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Owners Guide
and Installation Manual for
the ASI-1000
Low-voltage utility-interactive inverter:
On-grid photovoltaic inverter
Off-grid battery backup inverter
®
Copyright © Athena Energy Corp. All Rights Reserved
No part of this document may be reproduced, stored in a retrieval system, or transmitted, in any form or
by any means, electronic, mechanical, photographic, magnetic, or otherwise, without the prior written
permission of Athena Energy Corp.
Athena Energy makes no representations, express or implied, with respect to this documentation or any
of the equipment and/or software it may describe; including (with no limitation) any implied warranties
of utility, merchantability, or fitness for any particular purpose. All such warranties are expressly
disclaimed. Neither Athena Energy nor its distributors or dealers shall be liable for any indirect,
incidental, or consequential damages under any circumstances.
(The exclusion of implied warranties may not apply in all cases under some statutes, and thus the above
exclusion may not apply.)
Specifications are subject to change without notice. Every attempt has been made to make this
document complete, accurate, and up-to-date. Readers are cautioned, however, that Athena Energy
reserves the right to make changes without notice and shall not be responsible for any damages,
including indirect, incidental or consequential damages, caused by reliance on the material presented,
including, but not limited to, omissions, typographical errors, arithmetical errors, or listing errors in the
content material.
Restrictions on Use
The ASI-1000 Inverter shall not be used in connection with life support systems, lifesaving or other
medical equipment or devices. Use of this particular equipment is at your own risk.
Revision History
Rev. No.
0.1
0.2
0.9
1.0
1.1
1.2
Date
11/11/2011
12/21/2011
1/07/2012
5/30/2012
7/18/2012
3/5/2013
By
D. Katsis
M. Craton
M. Craton
D. Katsis
D. Katsis
D. Katsis
Reason
Alpha Draft
Beta Draft
Preliminary Release
Adjustment for Certification
Adjustment for Certification
Final Adjustment for Certification
Owners Record:
The serial number is located on the front of the ASI-1000 Inverter. Record the serial number in
the space provided below and refer to it whenever you call upon your Athena Energy dealer
regarding this product. Model: ASI-1000 Serial No. ___________________________
Athena Energy Corp.
13602 Ulysses Court Bowie, MD 20720-5409 U.S.A.
Tel/Fax (+1) 301.352.8454
www.athenaenergycorp.com
www.athenaenergysolar.com
ASI-1000 GT Owner’s Guide and Installation Manual (Copyright 2013, Athena Energy Corp.)
IMPORTANT SAFETY INSTRUCTIONS
INSTRUCTIONS DE SÉCURITÉS IMPORTANTES
SAVE THESE INSTRUCTIONS
CONSERVER CES INSTRUCTIONS
This manual contains important instructions for the ASI-1000 that must be followed during
installation and maintenance of the inverter. The ASI-1000 is designed and tested according to
international safety requirements, but as with all electrical and electronic equipment, certain
precautions must be observed when installing and/or operating the ASI-1000. To reduce the
risk of personal injury and to ensure the safe installation and operation of the ASI-1000, you
must carefully read and follow all instructions, cautions, and warnings in this Installation Guide.
Safety and Hazard Symbols
DANGER / CAUTION: This symbol is used to call attention to important
information that you must have when installing and/or operating the ASI-1000.
Failure to read and follow instructions marked with this symbol could result in
injury or death and/or damage to the equipment.
HIGH VOLTAGE: This symbol appears beside instructions and warnings that deal
with dangerous voltages that can injure or kill people who come in contact with
them.
This symbol appears beside instructions, cautions, and warnings that deal with
portions of the equipment that can operate at temperatures high enough to
cause burns.
Cautions and Warnings
WARNING: A Warning describes a hazard to personnel. It calls attention to a
procedure or practice, which, if not correctly performed or adhered to, could
result in damage to or destruction of part or all of the ASI-1000 equipment
and/or other equipment connected to the ASI-1000 equipment or personal
injury
CAUTION: A Caution describes a hazard to equipment. It calls attention to an
operating procedure or practice, which, if not correctly performed or adhered
to, could result in damage to or destruction of part or all of the ASI-1000
equipment and/or other equipment connected to the ASI-1000 equipment
Warnings and Cautions may also be accompanied by one or more of the safety and hazard
symbols described above to indicate the type of hazard described therein.
ASI-1000 GT Owner’s Guide and Installation Manual (Copyright 2013, Athena Energy Corp.)
Other Symbols
In addition to the safety and hazard symbols described on the previous pages, the following
symbol is also used in this Installation Guide:
DC INPUT: Apply DC sources only to circuits labeled with the symbol
shown
AC INPUT: Apply AC sources only to circuits labeled with the symbol
shown
GROUND: Apply ground connections only to circuits labeled with the
symbol shown
General Warnings
All electrical installations must be done in accordance with the local and
National Electrical Code ANSI/NFPA 70.
The ASI-1000 contains no user-serviceable parts. Always return the unit
to an authorized Athena Energy Service Center for repairs and
maintenance.
WARNING: Before installing or using the ASI-1000, read all of the
instructions, cautions, and warnings on the ASI-1000, the PV array, and
in this Installation Guide.
You must not connect the ASI-1000 to the electrical utility grid until you
have received prior approval from the utility company. This connection
must be made only by qualified personnel.
PV arrays produce electrical energy when exposed to light and thus can
create an electrical shock hazard. Completely cover the surface of all PVarrays with opaque (dark) material before wiring them.
Risk of electric shock from energy stored in capacitor.
Do not remove cover until 1 minute after disconnecting ALL sources of
supply
ASI-1000 GT Owner’s Guide and Installation Manual (Copyright 2013, Athena Energy Corp.)
The ASI-1000’s enclosure acts as a heat sink to cool the internal
components. This heat sink can reach temperatures as high as 158° F
(70°C). To avoid the risk of burns, do not touch the ASI-1000’s heat sink
while the unit is in operation.
Important Battery Safety Instructions
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Be very careful when working around batteries, they can produce extremely high currents
if short-circuited. Read the battery supplier’s precautions before installing the inverter
and batteries.
Wear eye protection such as safety glasses when working with batteries.
Remove all jewelry such as rings, watches, bracelets, etc., when installing or performing
maintenance on the inverter.
Never work alone. Always have someone near you when working around batteries.
Use proper lifting techniques when working with batteries.
Never use old or untested batteries. Check each battery’s label for age, type and date
code to ensure all batteries are identical.
Batteries are sensitive to changes in temperature. Always install batteries in a stable
environment.
Install batteries in a well-ventilated area. Batteries can produce explosive gasses. For
compartment or enclosure installations, always vent batteries to the outside.
Provide at least one inch of air space between batteries to provide optimum cooling.
Never smoke when in the vicinity of batteries.
To prevent a spark at the battery and reduce the chance of explosion, always connect the
cables to the batteries first. Then connect the cables to the inverter.
Use insulated tools at all times.
Always verify proper polarity and voltage before connecting the batteries to the inverter.
To reduce the chance of fire or explosion, do not short-circuit the batteries.
In the event of accidental exposure to battery acid, wash thoroughly with soap and water.
In the event of exposure to the eyes, flood them for at least 15 minutes with running
water and seek immediate medical attention.
Recycle old batteries.
Warranty
All ASI-1000 inverters sold in the USA have a two-year factory warranty, as indicated on the
warranty card included in the ASI-1000 shipping container. For warranty coverage questions
offered by the distributor, please contact your distributor. If you have questions about the ASI1000 factory warranty please refer to the information posted on: www.athenaenergycorp.com.
ASI-1000 GT Owner’s Guide and Installation Manual (Copyright 2013, Athena Energy Corp.)
Table of Contents
1.
Introduction ............................................................................................................................. 7
2.
Product Overview .................................................................................................................... 9
Feature Overview .................................................................................................................... 9
3.
Safety ..................................................................................................................................... 10
Anti-Islanding Protection .......................................................................................................... 10
FCC Compliance ..................................................................................................................... 10
Interconnection Code Compliance ........................................................................................ 10
PV Series Fusing ..................................................................................................................... 10
4.
Specifications ......................................................................................................................... 10
Trip Limits / Trip Times .............................................................................................................. 12
Wire Size and Torque ................................................................................................................ 12
5.
ASI-1000 Basic Wiring Diagram ............................................................................................. 12
On-grid Connection ................................................................................................................... 12
6.
Photovoltaic PV (Solar) Panel Configurations ....................................................................... 14
7.
Standalone Off-Grid connection ............................................................................................ 19
System Features in “off-grid” mode.......................................................................................... 20
8.
Installation ............................................................................................................................. 23
Section 1: Unpacking and Inspection ........................................................................................ 23
Section 2: Mounting the ASI-1000 ............................................................................................ 24
Dimensions and Clearances ................................................................................................... 24
Wall mount guidelines for your ASI-1000 ............................................................................. 25
Section 3: Wiring the ASI-1000 ................................................................................................. 27
DC Connection Requirements ............................................................................................... 32
AC Connection Requirements ............................................................................................... 34
Section 4: Final Steps................................................................................................................. 36
Section 5: Displays and Messages ............................................................................................. 37
9.
10.
Troubleshooting..................................................................................................................... 39
Troubleshooting the GFDI fuse .......................................................................................... 40
ASI-1000 GT Owner’s Guide and Installation Manual (Copyright 2013, Athena Energy Corp.)
Table of Figures
Figure 1. Athena Energy ASI-1000 Installed in a typical grid-tie PV System ................................... 7
Figure 2. ASI-1000 used as an off-grid inverter with PV-only ......................................................... 8
Figure 3. ASI-1000 used as an off-grid inverter with battery-only ................................................. 8
Figure 4. ASI-1000 Wiring Diagram (on-grid mode) using a single PV array ................................ 13
Figure 5. ASI-1000 (on-grid mode) using a two-PV array configuration. ..................................... 13
Figure 6. System wiring when using “off-grid” standalone AC inverter mode ............................. 19
Figure 7. ASI-1000 Wiring Diagram (off-grid) ............................................................................... 22
Figure 8: Dimensions and Hole Placement mm (inches) ............................................................... 24
Figure 9. Cradle Mounting for solid wall installations. ................................................................. 25
Figure 10. Wiring through the bottom cradle prior to mounting inverter to the wall. ................ 26
Figure 11. View from bottom of the inverter. Note the positions of the access points for AC and
DC connections. ............................................................................................................................ 28
Figure 12. Bottom cover removal. ................................................................................................ 29
Figure 13. BACK VIEW of the inverter with the knockout cover removed. Note the screw-terminals
for AC connections, DC + solar, DC – solar, DC – battery, DC + battery. ...................................... 29
Figure 14. Simplified Electrical Wiring Diagram of a PV System................................................... 30
Figure 15. DC Input Connections. For grid-tie: connect SOLAR+ to BATT+ .................................. 30
Figure 16. AC output connections, Neutral, Earth Ground, and Line (Hot). ................................. 31
Figure 17. Use this chart to determine wire size for your system. ............................................... 32
Figure 18. Display progression for on-grid inverter operation. .................................................... 37
Figure 19. AC/DC Connection-board and GFDI Fuse .................................................................... 40
ASI-1000 GT Owner’s Guide and Installation Manual (Copyright 2013, Athena Energy Corp.)
1. Introduction
This installation guide provides all the information needed to mount, wire, and operate the
Athena Energy ASI-1000 grid-tied photovoltaic (PV) inverter. The Athena Energy ASI-1000 is the
first low-voltage string inverter to provide backup power then the grid is not available. Its
compact size and economical price make it ideal for starter or demonstration systems. It is also
perfectly suited for adding more power to an existing solar system. Its modular design makes
expansion to almost any size system easy. A wide input voltage ranges make the Athena Energy
ASI-1000 a versatile choice with not only PV panels, but also fuel cells, motor/generators, and
batteries. The ASI-1000 is always capable of direct conversion of solar power to utility power.
This is done without batteries and simply finds the maximum amount of solar power available.
This same system can be used to power your appliances off-grid with the addition of a battery.
In other words, the Athena Energy ASI-1000 can be used as either a utility interactive inverter
when connected to the utility or as an OFF-GRID standalone AC power source when needed. A
basic setup of an ASI-1000 system used for utility interactive ON_GRID operation is diagrammed
in Figure 1. All ASI inverters feature backup off-grid power. If solar panels are illuminated, the
ASI-1000 will provide off-grid power directly from solar panels, see Figure 2. If batteries are
available, the ASI-1000 will provide off-grid power directly from 12, 24, or 48V battery packs,
Figure 3. Battery charging is not built into this grid-tie model.
Utility Interactive Inverter:
ASI-1000
Athena Energy
Utility Interactive
Inverter
DISPLAY
Vin: Input DC
Vout: Output AC V
Pout: Output AC W
Phr: Total kWhr Out
Athena Energy
ASI1000
S/N
PV Input
PV Disconnect
Home / Utility
Connection
Figure 1. Athena Energy ASI-1000 Installed in a typical grid-tie PV System
ASI-1000 GT Owner’s Guide and Installation Manual (Copyright 2013, Athena Energy Corp.)
Utility Interactive Inverter:
ASI-1000
Printer
Athena Energy
Utility Interactive
Inverter
computer
DISPLAY
Vin: Input DC
Vout: Output AC V
Pout: Output AC W
Phr: Total kWhr Out
lighting
Tools
Athena Energy
ASI1000
S/N
PV Input
PV Disconnect
Power Outlet
to appliances
Figure 2. ASI-1000 used as an off-grid inverter with PV-only
12V Battery
Printer
Athena Energy
Utility Interactive
Inverter
DISPLAY
Vin: Input DC
Vout: Output AC V
Pout: Output AC W
Phr: Total kWhr Out
computer
12V Battery
lighting
Athena Energy
12V Battery
ASI1000
S/N
Tools
12V Battery
Battery Input
DC Disconnect
Power Outlet
to appliances
Figure 3. ASI-1000 used as an off-grid inverter with battery-only
Note: To help avoid problems during the installation, familiarize yourself with the installation
process by reading the entire Installation Guide before starting the installation.
ASI-1000 GT Owner’s Guide and Installation Manual (Copyright 2013, Athena Energy Corp.)
WARNING: In power conversion devices, such as an Athena Energy ASI1000 inverter, dangerous voltages are present. For this reason, it is
recommended that only trained professionals install this equipment.
2. Product Overview
The ASI-1000 takes DC power generated by a PV array or other DC source and converts it to AC
power, identical to the power available to you from your utility company. This means that any
power you use is offset by the power generated by your ASI-1000. In some cases your utility
meter may even “spin backwards” if your inverter generates more power than what is used by
your home while connected to the utility grid. Depending on your interconnection agreement
with your power company you may be credited with the extra power you have generated.
Note: Utility company policies vary. Consult with a representative of your
utility company before planning and installing a PV system.
Feature Overview
The ASI-1000 combines the latest generation of power devices and microcontroller technology
to track solar power all day while generating high quality AC power for your home. Extra
emphasis is made on design for high reliability and ease of use.
Your utility-interactive inverter includes:
 Certification to UL 1741/IEEE 1547
 5-year warranty standard
 Rugged aluminum enclosure for indoor installations in dry locations up to 40°C
 Exceptional reliability and energy capture
 High efficiency as a transformer-isolation type AC inverter
 Easy to install four-point mounting system for simple installation
 Modular design allows simple system expansion without extra cables or hardware
 4-digit scrolling LED information display for input/output voltage, power, and total energy
generated
 Built-in array combiner for dual-array systems
 Flexible DC input voltage range for use with most solar panels from 48 to 80VDC
Additionally your inverter is capable of off-grid operation for backup power
 Automatic battery voltage sensing: 12V, 24V, and 48V
 Automatic battery monitor with low-battery alert and low-battery shutdown
 Stand-by search mode to reduce power consumption when AC loads are disconnected
 Automatic cooling fan operation to reduce inverter noise under light-load
 Ability to operate with PV panels only. The ASI-1000 can start with 80W PV panels
 Extensive fault protection and user error message feedback
 Automatic startup protection if mode switch is in “off-grid” mode when connected to a
live AC line
ASI-1000 GT Owner’s Guide and Installation Manual (Copyright 2013, Athena Energy Corp.)
3. Safety
Anti-Islanding Protection
Islanding is a condition that can occur when the ASI-1000 (or any such inverter) is
disconnected from the utility grid when the load is resonant at 60 Hz, matching the output
of the ASI-1000 perfectly. Islanding is highly unlikely and has not been witnessed outside
of a controlled laboratory. Nevertheless, the ASI-1000 incorporates an advanced antiislanding protection feature to insure that the system will not create AC power unless it
is connected to the active utility.
FCC Compliance
The ASI-1000 has been tested and certified by a nationally recognized testing laboratory
and conforms to all FCC Part 15 B EMI/EMC emissions regulations.
Interconnection Code Compliance
The ASI-1000 has been tested and certified by ETL to meet the requirements of UL1741
Static Inverters and Charge Controllers for use in Photovoltaic Power Systems as well as
IEEE-929-2000 Recommended Practice for Utility Interface of Photovoltaic Systems and
IEEE 1547 Standard for Interconnecting Distributed Resources with Electric Power
Systems.
PV Ground Fault Detection and Interruption
The ASI-1000 is equipped with ground fault interruption. If a ground fault current is
detected, the ASI-1000 will shut down and display the fault condition on the display. Once
the ground fault is corrected, the error will need to be manually cleared before the
inverter can resume normal operation. Please see section 10.
PV Series Fusing
Series fusing may be required depending on the type of PV module used in the system.
PV system fusing is not included in the ASI-1000. See NEC 690.9
UL1741 is the standard applied by Underwriters Laboratories to the
ASI-1000 to certify that it meets the requirements of the NEC and
IEEE-929-2000. IEEE 929-2000 provides recommendations
regarding the proper equipment and functionality necessary to
ensure compatible operation when power generation is connected
to the utility grid.
Note: Contact the local utility and/or the local authority having jurisdiction prior to
connecting the ASI-1000 to the utility grid.
4. Specifications
Maximum input voltage (batt / solar input)
Range of input PV operating voltage
Maximum Continuous DC input current
Maximum DC input short circuit current
80 VDC
48-80VDC
25 A DC
100 A DC
ASI-1000 GT Owner’s Guide and Installation Manual (Copyright 2013, Athena Energy Corp.)
Maximum input source backfeed current to
input source
Output power factor rating
Operating voltage range (ac)
Operating frequency range
Nominal output voltage (ac)
Nominal output frequency
Maximum AC Continuous Output Current
Maximum AC Continuous Output Power (offgrid)
Maximum AC Continuous Output Power (ongrid)
Maximum Output Fault Current
Maximum Output Over-current Protection
0.8 A
0.99
120 (104 – 132) V ± 10%
59.3 – 60.5 Hz
120 V
60 Hz
9.43 A
1000W @ 35°C
1000W @ 35°C
230 A (182 µs)
15 A
Voltage trip time: V < 50 %
50 % ≤ V < 88 %
110% < V < 120 %
V ≥ 120 %
0.16 s
2.0 s
1.0 s
0.16 s
Frequency Trip Time: Freq > 60.5 Hz
Freq < 59.3
0.16 s
0.16s
Synchronization In-Rush Current
Trip Limit Accuracy: Voltage
Trip Limit Accuracy: Frequency Deviation
Trip Limit Accuracy: Time / Voltage
Trip Limit Accuracy: Time / Frequency
Normal Operation Temperature Range
Maximum full power operating ambient
temperature
Maximum continuous DC Power Input
Current THD
Peak Inverter Efficiency
Cooling
PV Start Voltage (Direct Current Input)
PV Maximum Power Tracking Voltage
DC Voltage Ripple
Power Consumption
< 400 mA
3%
< 0.5 %
3%
< 0.5 %
-20°C to 35°C
Enclosure
35°C
1250 W
Less than 3%
88%
automatic fan control
12 V
48 – 80V
Less than 5%
0.5 W night-time, 3W standby
20 W in-operation
Extruded Aluminum with Powder coated
steel back
ASI-1000 GT Owner’s Guide and Installation Manual (Copyright 2013, Athena Energy Corp.)
Dimensions
9.5” W x 18.5 “H x 3.25” D inches
241 W x 470 H x 83 D mm
6 kg (13.3 lbs)
UL 1741,
IEEE 519, IEEE 929,
Weight
Compliance
Trip Limits / Trip Times
Nominal Voltage
(VAC rms)
120 VAC
Nominal
(Hz)
Voltage Range
(VAC rms)
V < 50%
50% < V < 88%
110% < V < 120%
V > 120%
Frequency
60 Hz
Trip Time (s)
0.16
2
1
0.16
Trip Limit (Hz)
Trip Frequencies (Hz)
Trip times (s)
> 60.5
< 59.3
60.5
59.3
Max. 0.1602
Max. 0.1602
Wire Size and Torque
Flat-Head Screw Terminals
AC
Protective Earth
DC
In. lbs
5.3
5.3
12
Nm.
0.6
0.6
1.36
Wire Size
10-18 AWG
10-18 AWG
6-14 AWG
5. ASI-1000 Basic Wiring Diagram
On-grid Connection
In ON-GRID operation the energy from sunlight is converted to DC electricity by the PV panels.
This electricity is then converted to AC power by the ASI-1000 and sent to the utility AC
connection. A battery should never be used in this configuration as its stored energy will be
connected to the AC utility and quickly discharged by the ASI-1000.
On-grid wiring is typically done with multiple solar panels connected in series to achieve the
correct voltage for correct operation of the inverter. A total system DC optimum operating
voltage for the PV panels is from 48V to 80V. This is desirable for the most efficient operation of
the system.
A wiring diagram of the ASI-1000 in both on and off grid is shown in Figure 4 for a single PV array
system. Figure 5 shows the basic wiring diagram for a two-PV array system. The ASI-1000
includes two DC input connections to allow the user to combine two PV arrays without a separate
ASI-1000 GT Owner’s Guide and Installation Manual (Copyright 2013, Athena Energy Corp.)
combiner box. These connections are labeled BATT and SOLAR. PV panels can be connected to
either input. If PV panels are connected to both inputs, make sure that the PV panel voltages are
equal on each circuit.
ASI-1000
In “ON-GRID” mode
BATT +
BATT -
SOLAR +
SOLAR -
PV disconnect
Connection to
AC Breaker Box:
120 VAC
PV solar array input:
Open circuit: 48 – 80 VDC
Figure 4. ASI-1000 Wiring Diagram (on-grid mode) using a single PV array
PV Disconnect
BATT +
BATT SOLAR +
PV Inputs:
Open circuit: 48 – 80 VDC
SOLAR -
Connection to
AC Breaker Box:
120 VAC
Figure 5. ASI-1000 (on-grid mode) using a two-PV array configuration.
ASI-1000 GT Owner’s Guide and Installation Manual (Copyright 2013, Athena Energy Corp.)
6. Photovoltaic PV (Solar) Panel Configurations
CAUTION! Photovoltaic PV (solar) panels create a potentially dangerous DC
voltage when illuminated. Exercise care in connecting DC cables from an
illuminated PV (solar) array to the inverter.
The PV input to the ASI-1000 consists of two PV array connections: BATT +, BATT -, SOLAR +, and
SOLAR -. It is important to maintain the same input voltage for PV panels connected to these DC
inputs. PV panel configurations in Table 1 show how several PV panels can be connected to the
ASI-1000. The different connections for multiple PV panels are explained for different voltage
panels. Please refer to the figures in table 1 to obtain the highest power from your PV array.
It is always recommended to use similar power/voltage rated panels. If a configuration of
different voltage PV panels used, make sure that the voltages are balanced when connecting two
separate strings to the SOLAR and BATT inputs. If one string is higher voltage than the other, only
power from the higher string will be used, the lower voltage string will not always add power to
the system.
Definitions:
 Voc = open-circuit voltage of the PV panel when illuminated but not connected to the ASI1000.
 Voc total = open-circuit voltage of the combination of PV panels when illuminated but
not connected.
 Vmp = voltage of PV panel when connected to the inverter and producing maximum
power.
 Isc = short circuit current range of a typical PV panel depending on the size of solar panel.
 Power = power range of a typical system depending on the size of solar panel connected.
Table 1. PV array configuration for the ASI-1000
Configurations for on-grid PV
Typical Array
Configuration:
(please note that
actual numbers may
vary)
Connection of solar panels to the ASI-1000 BATT
and SOLAR input
ASI-1000 GT Owner’s Guide and Installation Manual (Copyright 2013, Athena Energy Corp.)
GOOD
CONFIGURATION
CONFIGURATION 1
Single String:
 1 or 2 PV panels
 Voc = 35V
 Voc total = 70V
 Vmp = 59V
 Isc = 4 – 20 A
Power =200 - 800W
BEST
CONFIGURATION
CONFIGURATION 2
Dual String:
 2 or 4 PV panels
 Voc = 35V
 Voc total = 70V
 Vmp = 56V
 Isc = 8 – 30 A
Power =400 1250W
ASI-1000 GT Owner’s Guide and Installation Manual (Copyright 2013, Athena Energy Corp.)
GOOD
CONFIGURATION
CONFIGURATION 3
Single String:
 3 PV panels:
 Voc = 21 V
 Voc total = 63 V
 Vmp = 50 V
 Isc = 6 – 17 A
Power =300 - 850W
All available panels
should be grouped
to a single string to
get
the
most
voltage
without
going over 80V.
BEST
CONFIGURATION
CONFIGURATION 4
Dual String:
 6 PV panels:
 Voc = 21V /
panel
 Voc total = 63V
 Vmp = 50V
 Isc = 12 – 30 A
Power=600-1250W
Two equal groups
of panels should be
connected
like
shown for best
performance.
ASI-1000 GT Owner’s Guide and Installation Manual (Copyright 2013, Athena Energy Corp.)
INCORRECT
CONFIGURATION
CONFIGURATION 5
This system has
different voltages
connected to the
DC inputs. The
most power from
string 1 will be
used. Very little or
no power from
string 2 will be
used.
Use this only if
larger string is
subject to frequent
shading.
WEAK
CONFIGURATION
CONFIGURATION 6
Dual String:
 2 PV panels:
 Voc = 20-35 V
 Voc total = 35 V
 Vmp = 28 V
 Isc = 12 – 30 A
Power =200 - 800W
This system has low
voltages connected
to the DC inputs. It
will operate but for
the most efficient
operation connect
both panels in
series on one input.
(see
CONFIGURATION 1)
ASI-1000 GT Owner’s Guide and Installation Manual (Copyright 2013, Athena Energy Corp.)
INCORRECT
CONFIGURATION
The ASI-1000 Gridtie is not configured
for battery and
solar
together.
Please use our AC
backup ASI-1000 RE
system for batterysolar
backup
instead.
Batteries or Solar
can
be
used
separately but NOT
together on the
ASI-1000 GT
ASI-1000 GT Owner’s Guide and Installation Manual (Copyright 2013, Athena Energy Corp.)
7. Standalone Off-Grid connection
The Athena Energy ASI-1000 utility interactive inverter is also a 1000W energy source for
standalone “off-grid” use when PV backup power is necessary or for use in remote locations
where grid-tie is unavailable. The true-sine wave output of this inverter is well suited to sensitive
loads and motor loads such as ceiling fans or room air circulators. This built-in “off-grid” ability is
only available to the user if the AC power from the utility has been disconnected or if the system
is used remote from other AC power sources. Typical input battery voltages are either 24VDC or
48VDC for full-power off-grid operation. Limited power availability (about 400W) is also available
for a single 12VDC battery. A standard battery-powered hookup is shown in Figure 6.
CAUTION! The inverter is NOT reverse polarity protected. Use care not to
connect the negative and positive battery voltage backward or damage
to the inverter will result. Verify the correct voltage polarity before
connecting the DC wires.
Switch Unit to “OFF-grid”
Disconnect
DC Fuse
AC appliances
Figure 6. System wiring when using “off-grid” standalone AC inverter mode
If the system is inadvertently connected to a live AC circuit during
standalone operation in “off-grid” mode, immediate system
damage or an over-current trip will occur. This will void the
warrantee.
ASI-1000 GT Owner’s Guide and Installation Manual (Copyright 2013, Athena Energy Corp.)
System Features in “off-grid” mode
Energy Saving Search Mode
To save energy, the ASI-1000 is programmed to enter a search mode when AC output falls below
5W. Every three seconds the ASI-1000 generates a small burst of AC power to see if a load is
present. Search mode cannot be disabled by the user; however a small load >5W will force the
unit to operate continuously.
Overcurrent protection
The ASI-1000 displays and controls output AC power with a built-in current sensor. This sensor is
capable of protecting against over current surges and some short-circuits. In certain situations
the system may not detect all short-circuits. When “Iout_trip” or “Iout_HOT” is displayed, DC
battery power needs to be disconnected to the unit in order to reset the trip and allow the unit
to restart.
Live AC grid startup protection
The existence of live AC before connecting DC will not damage or affect the ASI-1000 Inverter. If
the mode switch incorrectly moved from “on-grid” to “off-grid”, the ASI-1000 will sense the AC
voltage and disable operation without damage. The LED indicators will scroll the message:
“GRID_FLIP”. This message will be displayed to tell the user to return the unit mode-switch to
on-grid operation with PV panels. Otherwise a “GRID_TRIP” message will also be displayed on
the LED display. In either case AC output will not be produced until the mode switch is changed
or the system is disconnected from the live AC circuit.
Input overload
DC input power must exceed the rating of the devices plugged in. If the DC input voltage drops
“Vin_too_low” will display and “BATT_Trip” will also display and will shut down the unit. The
system will then go into automatic recovery mode and attempt to restart 5 times before shutdown is required. Check if the DC cables are worn or incorrect size for the load.
Automatic Battery Sensing and Under-voltage Shutdown
The ASI-1000 will operate with any DC power source from 12 to 48 VDC input when used with
batteries in “off-grid” mode. It is recommended that at least 24VDC batteries be used with the
inverter for maximum AC power. This will allow for efficient operation. Starting larger loads such
as motors and refrigerators will require 2000W surge capacity. To achieve full surge capacity it is
necessary to operate at either 24 VDC or 48 VDC input for reliable operation of such loads.
The ASI-1000 automatically senses and monitors the input battery voltage configuration for 12,
24, and 48 VDC. There is no need for the user to manually setup the inverter for these voltages.
Table 2 provides the inverter operating ratings for the three automatically sensed battery
voltages.
Table 2. Battery voltage and power limits for the ASI-1000
Battery Voltage
12
24
48
Power Limit
400 W (peak)
1000W (cont.) 2000W (peak)
1000W (cont.) 2000W (peak)
Battery Low-Voltage Trip
11 VDC
21 VDC
42 VDC
ASI-1000 GT Owner’s Guide and Installation Manual (Copyright 2013, Athena Energy Corp.)
Battery Bank
When planning a battery bank, consider the following:
CAUTION: Hazard to Equipment: Batteries can emit vapors which
are corrosive over long periods of time. Installing the inverter in
the battery compartment may cause corrosion which is not
covered by the product warranty.
WARNING: Observe correct battery polarity when connecting to
the inverter DC input. Reverse polarity connection will result in
immediate inverter damage and will void the warrantee.
CAUTION: Fire Hazard: Battery fuse protection is required for this
inverter. Observe correct short-circuit current and voltage limits
when sizing fuses for connections made to BATT + or SOLAR +.
Cables: Recommendations for battery cable size and length are shown on page 17. The
maximum length will determine the placement of the battery bank. Other local codes or
regulations may apply and may take priority over Athena Energy recommendations.
Battery Type: The ASI-1000 works best with lead-chemistry batteries intended for deep
discharge. These include batteries for marine, golf-cart, and forklift applications. They also
include gel-cell batteries and absorbed glass-mat (AGM) batteries. Athena Energy
recommends the use of batteries designed specifically for renewable energy applications.
Automotive batteries are strongly discouraged and will have a short life if used in inverter
applications.
Bank Size: In backup or off-grid applications, the battery bank size should be calculated
based on expected loads and run time. If other charging devices are present, the
minimum bank size should be determined by adding the battery charger rate to any other
chargers and multiplying the result by five. Example: If the system’s combined charge rate
is 16 ADC, the minimum battery bank size should be 80 amp-hours.
CAUTION, Ventilation: A vented enclosure for the battery bank may be required by
electric code and is recommended in most cases for safety reasons. It may be necessary
to use a fan to ventilate the battery enclosure. Batteries must be regularly maintained
according to the instructions of the battery manufacturer.
PV Panel Operation
In many cases the ASI-1000 will also provide useful standalone “off-grid” power with only a PV
panel. The ASI-1000 uses a soft-start feature to gently recover power from the smallest PV panels.
Panels tested down to 50W will allow the ASI-1000 to generate usable AC power for small loads
such as cell-phone chargers and small electronic appliances. It may be necessary to apply a small
load to make sure that the total AC consumption of the system exceeds 7W. This will allow
continuous AC power to be generated and exit “search mode”.
ASI-1000 GT Owner’s Guide and Installation Manual (Copyright 2013, Athena Energy Corp.)
AC surge power is greatly diminished in PV panel operation. Large loads
such as refrigerators will not start using a PV panel as a DC input source.
To ensure proper startup of loads with PV panels only, the surge rating
of the load must be matched by the PV panels.
AC appliance overload
Appliances such as refrigerators and incandescent lights require very high in-rush currents.
Connection of incandescent lamps must be done in stages to allow the system to recover without
an overcurrent trip. For example a 600W or 1000W space heater can be connected to the system
with no trip but a 250W incandescent lamp may potentially trigger a protective over-current trip.
Small – medium sized home refrigerators have been tested to operate with the inverter at both
24V and 48V. Higher currents are required to start even these appliances. These high currents
cannot be started with 12V batteries. This inverter has been tested to start loads of up to 2000W
at 24VDC and to start many modern full-size energy-star refrigerators.
For larger loads, it may be helpful to use 48VDC instead. Maximum continuous power must never
exceed 1000W and surge must never exceed 2000W for more than 5s or the unit will shut down
and display “IOut_triP” or “IOut_hOt” until the DC input power to the inverter is disconnected
and re-connected.
SOLAR +
SOLAR -
BATT +
To 120 VAC
60 Hz loads
BATT -
FUSE
DC Disconnect
Battery or Solar Input: 12 – 80VDC
Figure 7. ASI-1000 Wiring Diagram (off-grid)
ASI-1000 GT Owner’s Guide and Installation Manual (Copyright 2013, Athena Energy Corp.)
8. Installation
The installation of your ASI-1000 inverter is a simple five step process that this section will guide
you through.
Section 1: Unpacking and Inspection
This section provides instructions and information for unpacking the ASI-1000, inspecting it for
shipping damage, and if necessary, returning a damaged ASI-1000.
Section 2: Mounting the ASI-1000
This section includes guidelines to help you select the best mounting location, cautions and
warnings that you should follow to avoid injury and/or equipment damage, and step-by-step
instructions for mounting an ASI-1000 inverter.
Section 3: Wiring the ASI-1000
This section includes guidelines for selecting the correct wire sizes, cautions and warnings that
you should follow to avoid injury and/or equipment damage, and step-by-step instructions for
setting the internal voltage-range jumper, wiring an ASI-1000 to a PV array, household electrical
circuits, and the utility grid. Procedures are also included for connecting optional datacommunication cables to the ASI-1000.
Section 4: Final Steps
Commissioning involves applying DC input power to the ASI-1000, observing the LED indicators
on the cover.
Section 5: Troubleshooting
Typical display data is explained in this section along with tips and procedures for resolving
problems that can occur during installation.
Section 1: Unpacking and Inspection
Sometimes damage occurs during the shipping process. Please report any damage you find upon
unpacking your inverter to your distributor and the shipping company.
WARNING: The ASI-1000 weighs about 6 kg (13.2 lbs). Be careful to avoid injury
while lifting or moving the ASI-1000. If possible, have someone help you unpack
and install your ASI-1000
If you need to return your ASI-1000, you can contact your installer or distributor for a
return merchandise authorization (RMA) and shipping instructions.
ASI-1000 GT Owner’s Guide and Installation Manual (Copyright 2013, Athena Energy Corp.)
Section 2: Mounting the ASI-1000




Find a place to install your ASI-1000 in a location not exposed to direct sunlight. Higher
temperatures from direct sunlight can lead to reduced performance of your unit and may
make it difficult to read the information display.
Use the supplied bottom cover as the mounting cradle. This part can be attached to the
wall to hold the inverter in place while mounting screws are put into the wall.
The ASI-1000 is not a toy and should not in any circumstance be operated by, or accessible
to children.
The ASI-1000 should be mounted vertically at eye level to a surface strong enough to hold
its weight (5.5kg, or 12lbs)
Dimensions and Clearances
The dimensions of the ASI-1000 are shown in figure 4. Please note that the top of the unit is the
hot-air discharge for the cooling fan. There must be 2 inches of space above the top of the unit
and its fan opening to allow sufficient cooling air-flow.
There should be at least 8 inches, 20mm of clearance on either side of the inverter cooling fins.
WARNING: To avoid injury, lift the ASI-1000 carefully, and handle
it carefully to prevent the weight of the inverter from causing you
to lose your balance and fall. If possible, have someone help you
when you mount the ASI-1000.
+
+
+
+
+
+
0.125” 3.18mm
(13.00”)
330.2 mm
(10.00”)
254 mm
(11.00”)
279.4 mm
+
+
+
+
+
+
(15.00”)
279.4 mm
(18.5.00”)
470 mm
(8.875”)
225.43 mm
(9.5”) 241.3 mm
(3.25”) 83mm
Figure 8: Dimensions and Hole Placement mm (inches)
ASI-1000 GT Owner’s Guide and Installation Manual (Copyright 2013, Athena Energy Corp.)
Wall mount guidelines for your ASI-1000
The ASI-1000 is designed to make wall-mounting easy for the professional and do-it-yourself
installer. The bottom cradle containing the knockouts for the AC and DC inputs is removable and
can be used to hold the inverter in place while the position holes are measured and drilled for
final inverter mounting.
1. Mark where holes should be drilled, positioning the marks where it will be level.
2. Drill holes ensuring the diameter of the holes you drill are appropriate
Material
Concrete
Wall with wooden studs
Hole Diameter
The same as the outside diameter of the
concrete anchors you intend to use
The correct size for the lag screws you intend
to use
3. Attach the bottom cradle to the wall. This will give you a place to rest the inverter so that
it will be easier to attach the screws holding the inverter to the wall. See Figure 9.
Figure 9. Cradle Mounting for solid wall installations.
4. Pull through AC and DC cables from the cradle and out to the inverter. Place the inverter
on a steady surface. The inverter should be facing down to reveal the screw terminals
used to hold the AC and DC connections to the inverter. Make the connections and place
the inverter into the cradle.
ASI-1000 GT Owner’s Guide and Installation Manual (Copyright 2013, Athena Energy Corp.)
Figure 10. Wiring through the bottom cradle prior to mounting inverter to the wall.
Carefully, with help if available, position the inverter on the wall as in figure 5, lining up the holes
on the side flanges with the pilot holes drilled in the wall. Insert four steel lag screws through the
holes and into the holes you drilled in the wall. Tighten the screws until the inverter is held firm
against the wall, being careful not to over tighten them. Be sure to attach lock-washers and
screws that were removed from the bottom of the cradle.
CAUTION: The enclosure can reach temperatures up to 70°C (158°F)
during normal operation. Vertical Mounting is recommended to vent
excess heat from the enclosure. Allow 4” (100mm) of space along the
sides of the unit to provide sufficient cooling airflow.
CAUTION: The ASI-1000 weighs 6 kg (13 lb.). Ensure that the surface on
which you mount the ASI-1000 is strong enough to hold the weight. Do
not mount the ASI-1000 on plasterboard (sheet-rock) or thin wood
paneling without sufficient load-rated screws or bolts.
CAUTION: All electrical conduits and any communication cables must be
positioned and/or sealed so that no water can enter the inverter
enclosure through these conduits and cables.
CAUTION: If you are installing the ASI-1000 in a cabinet, closet, or other
relatively small enclosed area, you must provide sufficient air circulation
to dissipate the heat generated by the inverter.
ASI-1000 GT Owner’s Guide and Installation Manual (Copyright 2013, Athena Energy Corp.)
WARNING: When the ASI-1000 is operating, individual parts of the
enclosure may reach temperatures of 158° F (70° C). To prevent burns,
ensure that nothing comes in contact with the heat sink and that
surrounding materials are sufficiently heat-resistant.
WARNING: To prevent electrical shock or other injury, check for existing
electrical or plumbing installations in the walls where you plan to drill
WARNING: To avoid injury, lift the ASI-1000 carefully, and handle it
carefully to prevent the weight of the inverter from causing you to lose
your balance and fall. If possible, have someone help you when you
mount the ASI-1000.
Note: The National Electrical Code may require significantly larger working clearances (see NEC
Section 110.26).
Section 3: Wiring the ASI-1000
The ASI-1000 is designed to feed 106VAC to 132VAC to the utility grid or an isolated system at
60Hz. Be sure all AC and DC sources are de-energized by switching off all AC and DC disconnects
and breakers.
WARNING: All electrical installations must be done in accordance
with all local electrical codes and the National Electrical Code
(NEC), ANSI/NFPA 70. Use Copper Conductors Only
CAUTION: The input and output circuits of this inverter are
isolated from the enclosure. System grounding, when required
by Sections 690.41, 690.42, and 690.43 of the National Electric
Code, ANSI/NFPA 70 is the responsibility of the installer
WARNING: You must connect the wires that carry the AC voltage
from the ASI-1000 to the utility grid and the wires that carry the
DC voltage from the PV array to the ASI-1000 in the order
described in the procedures in this section. Deviating from these
procedures could expose you to lethal voltage that can cause
serious injury.
WARNING: Always turn OFF all breakers and switches in the PV
system. Do this before connecting any wires to the ASI-1000 or
disconnecting any wires from the ASI-1000.
ASI-1000 GT Owner’s Guide and Installation Manual (Copyright 2013, Athena Energy Corp.)
WARNING: Always wait a minimum of 1 minute for the stored
potential in the ASI-1000 to discharge completely before
opening the enclosure.
WARNING: Before connecting the ASI-1000 to the electrical utility
grid, contact the local utility company. This connection must be
made only by qualified personnel.
WARNING: Never apply power to the ASI-1000 with the cover
removed.
DC INPUT: Apply DC sources only to circuits labeled with the
symbol shown
AC INPUT: Apply AC sources only to circuits labeled with the
symbol shown
GROUND: Apply ground connections only to circuits labeled with
the symbol shown
Battery or
Solar
Input
Figure 11. View from bottom of the inverter. Note the positions of the access points for AC and DC connections.
AC
Output
Solar Input
ASI-1000 GT Owner’s Guide and Installation Manual (Copyright 2013, Athena Energy Corp.)
Remove these screws only (save lock-washers)
Figure 12. Bottom cover removal.
Battery
+
and/or
Solar +
Minus (-) for
Batt /Solar
Solar +
(Solar only)
AC Output:
Line / Earth / Neutral
Note: AC Neutral is not
bonded to ground
Figure 13. BACK VIEW of the inverter with the knockout cover removed. Note the screw-terminals for AC
connections, DC + solar, DC – solar, DC – battery, DC + battery.
The bottom cover with conduit connections must be removed to attach wiring. Knockouts on the
cover fit ¾” conduit. Refer to Figure 12 to remove the bottom cover. Looking up at the inverter,
the AC connections on the left are “Neutral,” “Earth-Ground,” and “Line Hot.” As shown in Figure
13. The AC line should be connected between Hot and Neutral.
ASI-1000 GT Owner’s Guide and Installation Manual (Copyright 2013, Athena Energy Corp.)
AC output (neutral) is NOT bonded to ground in this inverter.
The ground connection must be connected to the AC service ground connection. When a fault
occurs, the ground connection provides a low-impedance path to earth. The ground cable should
be connected according to local electric codes. The DC input connections are shown in Figure 14.
If a small panel <300W is used, it can be connected directly to SOLAR + and SOLAR -. Large solar
arrays however will be connected to SOLAR AND BATTERY together, please refer to the PV
connection guide found in Table 1.
Refer to Table 1 for
all PV array
configurations
SOLAR
PANEL
- +
SOLAR
PANEL
- +
DC
+ BATTERY
- BATTERY
BREAKER
- SOLAR
MODE
+ SOLAR
LINE HOT---
NEUTRAL --
- GROUND-
AC
SOLAR
PANEL
- +
To 120VAC 60Hz System via Approved Disconnect
Figure 14. Simplified Electrical Wiring Diagram of a PV System
Figure 15. DC Input Connections. For grid-tie: connect SOLAR+ to BATT+
ASI-1000 GT Owner’s Guide and Installation Manual (Copyright 2013, Athena Energy Corp.)
Figure 16. AC output connections, Neutral, Earth Ground, and Line (Hot).
Note: All AC, DC, and Protective Earth (PE) connections must be
done in accordance with all local electrical codes and with the
National Electrical Code (NEC), ANSI/NFPA 70.
o For all AC and Protective Earth (PE) connections to the ASI1000, use 6-14 AWG solid or stranded copper wire rated at
least to 90° C (194° F)
o For all DC wiring connections to the ASI-1000, use 6-10
AWG solid or stranded copper wire rated at least to 90° C
(194° F).
WARNING: Always wait a minimum of 1 minute for the stored
potential in the ASI-1000 to discharge completely before opening
the enclosure.
WARNING: All electrical installations must be done in accordance
with all local electrical codes and the National Electrical Code
(NEC), ANSI/NFPA 70.
WARNING: Before connecting the ASI-1000 to the electrical utility
grid, contact the local utility company. This connection must be
made only by qualified personnel.
ASI-1000 GT Owner’s Guide and Installation Manual (Copyright 2013, Athena Energy Corp.)
Percent Voltage Drop at full power for AC cables
2.0
1.6
Athena Energy Recommends no greater than
1.5% voltage drop for AC connection
1.2
0.8
0.4
0.0
Figure 17. Use this chart to determine wire size for your system.
Note: The AC input and AC output circuits are isolated from the enclosure and system
grounding, if required by section 250 of the National Electric Code, ANSI/NFPA 70, is the
responsibility of the installer.
Note: The Photovoltaic System Grounding shall be installed per the requirements of sections
690.41 through 690.47 of the National Electric Code, ANSI/NFPA 70, and is the responsibility of
the installer.
DC Connection Requirements
Please refer to Figure 17 for array cable sizing. When using other DC sources, parallel cables from
a DC source such as a battery may be brought to BOTH SOLAR + and BATT +.
WARNING: The external DC disconnect for the system must have
a minimum rating of 80 VDC and 30 ADC continuous.
CAUTION: Overcurrent protection for the battery circuit (if used)
is to be provided by others, such as an external fuse.
CAUTION: The open-circuit voltage of the connected DC string
must never exceed the maximum DC input-voltage Applying an
open-circuit voltage that exceeds the maximum DC input voltage
ASI-1000 GT Owner’s Guide and Installation Manual (Copyright 2013, Athena Energy Corp.)
will cause irreversible damage to the ASI-1000 and will void the
warranty.
WARNING: PV arrays are energized when exposed to light. Use
safe working practices when working on PV arrays.
CAUTION: Verify the polarity and the open-circuit voltage from
the PV strings before you connect the DC wires to the ASI-1000.
Applying an open-circuit DC-input voltage that has reversed
polarity will cause irreversible damage to the ASI-1000 and will
void the warranty.
CAUTION: Avoid using wire nuts to join any wires together or to
make any connections anywhere in the PV system. Wire nuts are
a frequent cause of unreliable connections, resistive connections,
and ground faults.
1. Wire from the PV Panels to the DC disconnect
2. Wire from the DC disconnect to the ASI-1000
WARNING: You must connect the wires that carry the DC voltage
from the PV array to the ASI-1000 in the order described in the
following procedure. Deviating from this procedure could expose
you to lethal voltages that can cause serious injury and/or death.
a. Verify that the main breaker in the main utility breaker box is OFF.
b. Open the DC disconnect in the DC disconnect enclosure.
c. Install two ¾” conduits (if the system does not already have these installed). The
conduit feed-through connectors fit in the ASI-1000’s DC wiring knockouts. The DC
knockouts are the two knockouts on the left-bottom of the ASI-1000 as shown in
Figure 12. Fasten the clamp-fitting or conduit-feed through on the inside of the
ASI-1000 with the nut supplied with the fitting.
d. Install ¾” conduits between the DC disconnect enclosure and the ASI-1000’s DC
wiring knockouts
e. Pull the DC wires from the DC disconnect through the conduit into the interior of
the ASI-1000
f. Connect the positive DC wire to the terminal labeled BATT+ in the ASI-1000.
g. Connect the negative DC wire to the terminal labeled BATT- in the ASI-1000.
h. Connect the positive and negative DC wires to the appropriate terminals in the
DC disconnect enclosure.
i. Fasten the wires while applying a torque.
j. Verify that all connections are correctly wired and tight to proper torque (see table
-2 for correct torque ratings).
ASI-1000 GT Owner’s Guide and Installation Manual (Copyright 2013, Athena Energy Corp.)
Table – 2. Tightening torque
N-m (pound-inch)
k. Note: The ASI-1000 has provisions for combining either one or two PV strings.
The DC input terminal block has four positions: BATT +, SOLAR +, BATT -, and
SOLAR -. PV arrays can be wired so two pairs of PV arrays can be connected in
parallel. See Table 1
AC Connection Requirements
1. Using the mode switch, select on-grid (typical SOLAR installation) or off-grid mode (for
DC battery backup only)
2. Connect the ASI-1000 to a dedicated circuit of correct voltage (120VAC for US versions)
WARNING: The National Electrical Code (NEC) states that the
inverter must be connected to a dedicated circuit, and that no
other outlets or devices can be connected to the same circuit. See
NEC Section 690-64(b) (1). The NEC also imposes limitations on
the size of the inverter and the manner in which it is connected to
the utility grid. See NEC Section 690-64(b) (2).
WARNING: “To reduce the risk of fire, do not connect to an AC
load center (circuit breaker panel) having multi-wire branch
circuits connected.
WARNING: To reduce the risk of fire, connect only to a circuit
provided with 15 amperes maximum branch circuit over-current
protection in accordance with the National Electric Code,
ANSI/NFPA 70.
WARNING: You must connect the wires that carry the AC voltage
from the ASI-1000 to the utility grid in the order described in this
ASI-1000 GT Owner’s Guide and Installation Manual (Copyright 2013, Athena Energy Corp.)
procedure. Deviating from this procedure could expose you to
hazardous voltages that can cause serious injury and/or death.
WARNING: When in off-grid mode if the ASI-1000 is generating AC
power be sure not to connect the inverter into a live AC receptacle
connected to the grid. Serious damage to the inverter will occur.
This is not covered by your warrantee.
This unit or system is provided with fixed trip limits and shall not
be aggregated above 30 kW on a single Point of Common
Connection.
Note: While in off-grid mode, if the inverter is suddenly switched to on-grid mode, the unit
will stop making AC power and will wait to see AC voltage from the power company. If a
correct voltage is found, the inverter will begin operating as a grid-tie inverter.
If while selling power in on-grid mode and the mode switch is changed from on-grid to offgrid, the unit will stop selling power and display the GFDI message. The unit must be reset by
disconnecting DC sources (solar panels and batteries). If message persists, the GFDI fuse must
be checked and/or replaced. See section 10.
3. Replace the cover
When you have finished connecting the AC-output wires, the DC-input wires, and the
grounding wires, re-check all your connections to ensure that everything is in the right
place and that all connections and knockout fittings are secure, properly torque, and
undamaged. Check all of the knockout fittings on the bottom of the ASI-1000 to
ensure that they provide a tight seal. Carefully position the cover back on the
enclosure and attach with the two screws and lock washers you previously removed
insuring that they are fully tightened
4. Verify the mode switch is in the “ON-GRID” position
5. Turn the DC switches or breakers on
6. Turn the AC switches or breakers on
7. Now that power is available from the solar array, status will display on the ASI-1000
a. The display will first read “ON-GRID”
b. The system will charge up while displaying “HOLD”
c. If in off-grid mode and a voltage is detected on the AC line, “GFDI” will be displayed
until the system is reset
8. When ready, if in on-grid mode, the inverter will display “HOLD” while satisfying the
measurement safety requirements of the AC power company.
9. Your inverter will begin to produce power, displaying input voltage, output voltage, power
and energy: “VIN XXXX VOUT XXXX POUT XXXX Phr XXXX”
Note: Whenever you disconnect the ASI-1000, first turn off all AC disconnects and then all dc
disconnects. It is important to disconnect the AC system before the DC system.
ASI-1000 GT Owner’s Guide and Installation Manual (Copyright 2013, Athena Energy Corp.)
WARNING: Follow the steps in the installation procedure in the
order they are presented. Deviating from these procedures could
expose you to lethal voltages that can cause serious injury and/or
death.
CAUTION: Follow the steps in the commissioning procedure in the
order they are presented. Deviating from these procedures could
cause irreversible damage to the ASI-1000 and void the warranty.
Note: If there is a ground fault in the array, the GFDI error message will be displayed and the
GFDI fuse may clear. If this error message is encountered, switch off the DC and AC disconnects
to the ASI-1000 and troubleshoot the array. The GFDI fuse will need to be replaced with a 0.63A
(630mA) 5 x 20mm fuse. A complete power-down and restart will be needed to clear the GFDI
fault.
Note: If the ASI-1000 is not operating as expected after the commissioning procedure has been
completed, refer to Section 6: Displays and Messages and to Section 7: Troubleshooting.
Note: If there is adequate solar irradiation and the resulting PV input voltage is sufficient, the
ASI-1000 will automatically begin feeding power to the utility grid after a 5-minute wait time.
Note: Anytime the AC power is disconnected from the inverter, either manually or as a result
of an AC disturbance, the inverter will wait 5 minutes after the AC power has been restored to
reconnect. When servicing the inverter, always disconnect the AC first, then the DC.
Section 4: Final Steps
Ensure that your inverter is operating correctly and that no error messages are showing. If this is
the case you can observe the power and energy being produced from the LED display. Total
energy harvested is shown as a total in the “Phr” message and is stored as kilowatt hours. This
number is the life-time energy that the system has produced. The maximum is 9999 kilowatt
hours. This can be achieved from 6 – 10 years of continuous operation depending on climate and
solar panel size. Phr will update every half-hour and round to the nearest kilowatt-hour each day.
The day’s production is always added to the previous day’s total.
The progression of display messages are as shown in Figure 18 for a normal “on-grid” day of
operation with a PV array.
ASI-1000 GT Owner’s Guide and Installation Manual (Copyright 2013, Athena Energy Corp.)
Figure 18. Display progression for on-grid inverter operation.
Section 5: Displays and Messages
LED indicators: Scrolling 4-digit, 7 segment display
Message
ON-GRID
OFF-GRID
HOLD
LOAD TOO HIGH
Explanation
Mode message: The system is in ON-GRID
mode This is the mode for connecting a PV
array or other DC source to the live AC grid.
Mode message: The system is in OFF-GRID
mode. This is the mode for operation as a
stand-alone inverter.
This message is displayed while in on-grid as
the inverter is preparing to attach to the AC
line. In off-grid mode it is displayed briefly
when first connected to a battery or solar
panel.
There is not enough power being supplied by
the solar panels to power the load provided,
or the load provided exceeds the capabilities
of the inverter. This message is displayed on
startup while the unit charges and prepares to
sell power.
ASI-1000 GT Owner’s Guide and Installation Manual (Copyright 2013, Athena Energy Corp.)
VIN XXXX
VOUT XXXX
POUT XXXX
Phr XXXX
GRID FLIP
GRID TRIP
VIN TOO HIGH
VIN too LOW
Iout HOT
OVP
GFDI (ON GRID Only)
During operation: the voltage supplied by
your solar array, or, TOO LO if the voltage is
not high enough to generate power
During operation: the voltage supplied to the
grid or power consuming devices
During operation: the power provided to the
grid or power consuming devices
During on-grid operation only: total amount of
kilo-Watt hours sold to the grid over operating
lifetime
When a line voltage is detected in off-grid
mode, the GRID FLIP message is displayed.
System will not work until you flip the mode
switch to on-grid.
This is displayed for 5 minutes during startup
or when an on-grid violation has occurred of
either voltage or frequency.
A voltage on the input has appeared that is too
high for the unit to operate safely.
The input voltage is too low to produce power
The operating temperature is too high (Fan
will operate to cool down the unit while this
message is displayed)
In off-grid mode this message indicates a
serious output overcurrent condition. Check
your cables and disconnect DC, reconnect DC
to clear the message and restore operation.
The over-voltage monitor recorded a DC input
exceeding 100VDC. The unit may continue
operating normally but there is a high
likelihood that damage was sustained. It is
recommended that you return the unit for
service.
A ground fault error has occurred and the unit
must be restarted. The GFDI fuse must be
checked and/or replaced. The solar array may
have sustained substantial damage if this fault
has occurred and should be checked for a DC
– Earth fault
ASI-1000 GT Owner’s Guide and Installation Manual (Copyright 2013, Athena Energy Corp.)
9. Troubleshooting
Problem
Solution
Inverter not making power / Display off
GFDI message displayed
Check AC and DC connections/fuse and polarity
Check and/or replace GFDI fuse. Check polarity of
connections. Make sure PV array conductors are
not grounded.
Verify the load requirement is within the power
supply restrictions of the inverter, and that the
power that the solar panels are producing is
greater than the power required
When a line voltage is detected in off-grid startup,
the GRID FLIP message is displayed to protect
inverter. Flip the mode switch to on-grid to begin
selling power to the grid.
This fault is shown for AC voltage/frequency
deviation. Check wiring for problems. It is also
shown for wiring faults.
The system must be restarted by removing DC
power and re-connecting. The battery voltage is
too low to continue operating.
The battery voltage is too low to continue
operating. Allow the system to charge the
batteries, or replace the batteries.
LOAD TOO HIGH message displayed
(This fault automatically resets with the timeout
time prescribed by UL1741 rules…typically 5
minutes)
GRID FLIP message displayed
(This fault is reset immediately upon switching the
ON/OFF Grid select switch to the proper mode)
GRID TRIP message displayed
(This fault automatically resets on startup with
timeout …typically 5 minutes)
BATT TRIP message displayed (OFF GRID)
(The battery is too low to safely operate the
inverter and should be disconnected)
BATT LOW message displayed (OFF GRID)
(The inverter will stop making AC power until the
batteries are charged, this fault will reset
automatically)
OVP (Overvoltage protection)
(This is an indication of a DC overvoltage caused
by a lightning strike or a wiring mistake. It cannot
be reset, but if the unit is operational it will be
displayed instead of kilowatt hours.)
VIN TOO HIGH
Input DC power should be immediately
disconnected and checked for excessive voltage.
VIN LOW
This fault automatically resets as soon as more
power is available.
Iout: (TRiP) or (Hot)
The over voltage protection indicator is set. The
unit may continue operating normally if no
damage was sustained, but it is recommended
that the unit be returned for service.
If the system does not recover, check the fuses in
the EMI protection board. Input voltage cannot
exceed 90V at any time.
No damage has been sustained, but the input
voltage is too low to produce power. This may
occur on a cloudy day or if a battery is dead.
These error codes are shown when the load is too
high or a short-circuit is detected. If the fan is
running a temperature fault exists.
CAUTION: Have the grid connection to the ASI-1000 checked only
by a qualified electrician.
WARNING: If troubleshooting methods require that you open the
ASI-1000, do so only after disconnecting all sources of power to
the ASI-1000
ASI-1000 GT Owner’s Guide and Installation Manual (Copyright 2013, Athena Energy Corp.)
WARNING: Always turn OFF all AC and DC breakers and switches
in the PV system and wait a minimum of 1 minute for the ASI1000 to completely discharge before connecting any wires to the
ASI-1000 or disconnecting any wires from the ASI-1000.
10. Troubleshooting the GFDI fuse
WARNING: These servicing instructions are for use by qualified
personnel only. To reduce risk of electric shock, do not perform
any servicing other than that specified in the operating
instructions unless you are qualified to do so.
WARNING: This unit is not provided with a certified GFDI device.
This inverter or charge controller must be used with an external
GFDI device as required by the Article 690 of the National
Electrical Code for the installation location.
If a persistent GFDI fault is displayed on the front panel, the internal GFDI fuse must be replaced.
To replace a fuse, you must first de-energize and disconnect all inputs and outputs to your
inverter. Next, remove the bottom cover as in Section 3, page 15. The back cover should slide off
to reveal the printed circuit board of the ASI-1000. Check the GFDI fuse, if it is broken or blown,
replace with an appropriate fuse. Refer to Figure 19.
BATT SOLAR
AC LINE
GFDI Fuse 0.63A 5 x 20 mm
Figure 19. AC/DC Connection-board and GFDI Fuse
Fuse
GFDI Fuse
Replacement
Littlefuse or equivalent
250V Fast acting IEC 5x20 (mm) 0.63A (630mA)
ASI-1000 GT Owner’s Guide and Installation Manual (Copyright 2013, Athena Energy Corp.)