Solax A1 Series User manual

Copyright Declaration
The copyright of this manual belongs to SolaX Power Network Technology(Zhe jiang) Co,. Ltd. .
Any corporation or individual should not plagiarize, partitially or fully copy (including
software,etc.), and no reproduction or distribution of it in any form or by any means. All rights
reserved. SolaX Power Network Technology (Zhe jiang) Co.,Ltd. reserves the right of final
interpretation.
A1 Series User Manual
6.0kw - 8.6kw
614.00384.00
Solax Power Network Technology(Zhe jiang) Co,. Ltd.
UL

Contents
Contents
1 Note on this Manual
1.1 Scope of Validity
1.2 Target Group
1.3 Symbols Used
2 Safety
2.1 Important Safety Instructions
2.2 Explanation of Symbols
4.3 Efficiency, Safety and Protection
4.4 General Data
4.5 HMI
4.2 Grid
4.1 DC Input
5.3 Mounting
5.1 Check for Transport Damage
5.2 Packing List
5 Installation
03
03
03
04
05
05
07
16
15
15
14
14
18
17
17
17
01
6 Electrical Connection 22
3 Introduction 09
3.1 Basic Features
3.2 External Terminals of Inverter
3.3 Internal Terminals in Wiring Box
3.4 Identification of A1-Series
09
11
12
13
4 Technical Data 14
6.3 Grid Connection
6.4 Ground Connection
31
34
6.1 Overview Of All Electial Wirings Method
6.2 PV Connection
23
26

1.1 Scope of Validity
This manual is an integral part of A1 Series invereter. It describes the assembly,
installation, commissioning, maintenance and failure of the product. Please read it
carefully before operating.
1 Notes on this Manual
Notes on this ManualContents
03
8 Operation Method
8.1 Check all below Steps before Staring Inverter
8.2 Start the Inverter
8.3 Shut Down the Inverter
9.1 Preparation
9.2 Software Version
10 Setting
10.1 Control Pemel
10.2 Menu Structure
10.3 LCD Operation
11 Troubleshooting
11.1 Trouble Shooting
11.2 Routine Maintenance
12 Discommissioning
45
45
46
46
9 Firmware Upgrading 47
47
47
73
73
77
79
02
A1-6.0-US A1-7.0-US A1-8.6-USA1-7.6-US
1.2 Target Group
This manual is for qualified electricians. The tasks described in this manual only
can be performed by qualified electricians.
Note: “A1” series means PV grid-tied inverter.
“6.0” means 6.0kW.
7.1 Overview of all Communcation Cables Method
7.2 LAN Connection
7.3 Meter Connection (optional)
7.4 Rapid Shutdown Connection(optional)
7.5 Monitoring Connection (optional)
7.6 Emergency Stop Swith Connection
7 Communication Cables Connection 35
35
40
41
42
43
44
50
50
51
52
12.1 Remove the Inverter
12.2 Packaging
12.3 Storage and Transportation
79
79
79
NOTE！
SAVE THESE INSTRUCTIONS– THIS MANUAL CONTAINS
IMPORTANT INSTRUCTIONS FOR A1 SERIES THAT SHALL BE
FOLLOWED DURING INSTALLATION AND MAINTENANCE OF
THE UNIT.
CONSERVER CES INSTRUCTIONS. CETTE NOTICE CONTIENT DES
INSTRUCTIONS IMPORTANTES CONCERNANT LA SÉCURITÉ.
WARNING!
THESE SERVICING INSTRUCTIONS ARE FOR USE BY QUALIFIED
PERSONNEL ONLY. TO REDUCE THE RISK OF ELECTRIC SHOCK, DO
NOT PERFORM ANY SERVICING OTHER THAN THAT SPECIFIED IN THE
OPERATING INSTRUCTIONS UNLESS YOU ARE QUALIFIED TO DO SO.
AVERTISSEMENT!
LE GÉNÉRATEUR PV EST MIS À LA TERRE DURANT ISO CHECK ET CES
INSTRUCTIONS D’ENTRETIEN SONT DESTINÉES AU PERSONNEL
QUALIF I É SEUL E MENT. A FIN DE RÉDUI RE LES R ISQUES
D’ÉLECTROCUTION, NE PAS EFFECTUER DE RÉPARATIONS AUTRES
QUE CELLES DONT IL EST FAIT MENTION DANS LES INSTRUCTIONS
D’UTILISATION, À MOINS DE POSSÉDER LES QUALIFICATIONS
NÉCESSAIRES.
9.3 Upgrading Steps 48

DANGER！
“Danger” indicates a hazardous situation which, if not avoided, will result in
death or serious injury.
NOTE！
“Note” provides tips that are valuable for the optimal operation of our
product.
WARNING!
“Warning” indicates a hazardous situation which, if not avoided, could result
in death or serious injury.
CAUTION！
“Caution” indicates a hazardous situation which, if not avoided, could result
in minor or moderate injury.
1.3 Symbols Used
The following types of safety instructions and general information appear in this
document as described below:
Notes on this Manual Safety
2 Safety
2.1 Important Safety Instructions
DANGER!
Danger to life due to high voltages in the inverter!
Before installing or using the product, read all the instructions,
cautions, and warnings in this manual.
Before connecting the product to the electrical utility grid, contact
the local utility company.
All work must be carried out by qualified electrician.
Children should be supervised to ensure that they do not play
with the appliance.
CAUTION!
Danger of burn injuries due to hot enclosure parts!
During operation, the upper lid of the enclosure and the enclosure
body may become hot.
Only touch the lower enclosure lid during operation.
CAUTION!
Possible damage to health as a result of the effects of radiation!
Do not stay closer than 20 cm to inverter for any length of time.
WARNING!
All electrical installations must be carried out in accordance with the
local electrical standards and the National Electrical Code
ANSI/NFPA 70 or the Canadian Electrical Code CSA C22.1.
This document does not replace and is not intended to replace any
local, state, provincial, including without limitation applicable in the
jurisdiction of installation. SolaX assumes no responsibility for the
compliance or non-compliance with such laws or codes in
conneciton with the installation of the product.
05
04
Do not operate the inverter when the device is running.
WARNING !
Risk of electric shock!
WARNING !

SafetySafety
06 07
Prior to the application, please read this section carefully to ensure correct and
safe application. Please keep the user manual in a safe place.
Only accessories shipped with the inverter are recommended, otherwise it may
result in a fire or injury to the user.
Make sure that existing wiring is in good condition and that wire is not
undersized.
Do not disassemble any parts of inverter which are not mentioned in installation
guide. It contains no user-serviceable parts. See Warranty for instructions on
obtaining service. Attempting to service the inverter yourself may result in a risk
of electric shock or fire and will void your warranty.
Keep the inverter away from flammable materials to avoid the risk of a fire.
The installation place should be away from humid or corrosive substance.
Authorized service personnel must use insulated tools when installing or
working with this equipment.
Never touch either the positive or negative pole of PV connecting device. Strictly
prohibit touching both of them at the same time.
The unit contains capacitors that remain charged to a potentially lethal voltage
after the MAINS or PV supply has been disconnected.
Hazardous voltage will present for up to 5 minutes after disconnection from
power supply.
CAUTION-RISK of electric shock from energy stored in capacitor, Never operate
on the inverter couplers, the MAINS cables or PV cables when power is applied.
After switching off the PV and Mains, always wait for 5minutes to let the
intermediate circuit capacitors discharge before unpluging DC and MAINS
couplers.
When accessing the internal circuit of inverter, it is very important to wait 5
minutes before operating the power circuit or demounting the electrolyte
capacitors inside the device. Do not open the device before hand since the
capacitors require time to sufficiently discharge!
Measure the voltage between terminals UDC+ and UDC- with a multi-meter
(impedance at least 1Mohm) to ensure that the device is discharged before
beginning work (35VDC) inside the device.
The unit's input and output circuits are isolated from the enclosure. The 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.
Lightning and Surge Protection
A1 Series inverter are designed and certified to meet stringent UL1741/IEEE
1547 and ANSI/IEEE 62.41/62.42 lighting and surge requirements.
However, every PV installation is unique, thus additional external UL/NEC AC.
and DC surge protection and solid grounding practice is recommended.
2.2 Explanation of Symbols
This section gives an explanation of all the symbols shown on the inverter and
on the type label.
Symbols on the Inverter
Symbol Explanation
Operating Display.
An error has occurred, please inform your installer immediately.
Battery status (not in use).
Store away from damp and corrosive materials!
WARNING !

Safety
08 09
Symbols on the Type Label
Symbol Explanation
Type 1 Arc-Fault Circuit-interrupter in PV side.
Beware of hot surface.
The inverter can become hot during operation. Avoid contact
during operation.
Danger of high voltages.
Danger to life due to high voltages in the inverter!
Danger.
Risk of electric shock!
Observe enclosed documentation.
Do not operate this inverter until it is isolated from mains and on-site
PV generation suppliers.
CSA certified.
PV
AFCI
Type 1
Danger to life due to high voltage.
• There is residual voltage existing in the inverter after powering off,
which needs 5 min to discharge.
• Wait 5 min before you open the upper lid or the DC lid.
Warning.
when a ground fault is indicated, normally grounded conductors
may be ungrounded and energized or normally ungrounded
conductors may be grounded.
3 Introduction
3.1 Basic Features
A1 Seires is a high-quality inverter which can convert solar energy to AC energy.
The inverter can be used to optimize self consumption or feedin to public grid.
Work mode depends on PV energy and user’s preference.
Overview ( main components )
Inverter power box
Wiring box
Bracket
LCD display
Lockable DC switch
Conduit Plugs
Dimension
560.0mm
913.0 mm
276.0 mm
Introduction

IntroductionIntroduction
System Diagram
1110
PV array #1 +
-
PV array #2 +
-
PV array #3 +
-
PV array #4 +
-
+
-
+
-
+
-
+
-
L1 L2N
PV1
PV2
PV3 PV4 GRID
Ground Bus-bar
L1
L2
N
Grid Breaker
GEN Breaker
Ground Bus-bar
Wiring Box of A1 Series Inverter
Main SwitchSolaX Meter
L1
L2
N
METER
LAN
Router
Loads
Object
A
B
C
D
E
I
J
H
F
G
K
L
PV connection area
NC
Grid output connection
NC
NC
DC Disconnection swatch
Waterproof valve
Communication port
Pocket WiFi/LAN/4G (optional)
USB port for upgrading
Smart plug(optional)
Description
3.2 External Terminals of Inverter
H IJK
A B CD E F
Please note the inverter power box (section O) is sealed at the factory and there are no
user-serviceable parts inside. All wiring to install the inverter is done in the wiring box.
L
M
N
G
M
N
Reserved
Wiring box
Inverter power box

Introduction Introduction
12 13
3.3 Internal Terminals in Wiring Box
Object
A
B
C
D
E
Description
Please note that not all communication wirings connected with the terminals
on the communication board are shown in the picture.
Please refer to the Section 7 for the details for communication connection.
PV Fuses
BC
D
A
B B B
E
PV terminals
Grid terminal
Grounding bar
All communication terminals on communication broad
Model: A1-8.6-US
No. of MPPT/Strings Per MPPT
DC Operaitng Voltage Range
Max.DC Current per MPPT
Max.DC Power
Nominal AC Voltage
Max.Continuous Power
Max.Continuous Current
Nominal AC Frequency
4/1
10A
10320W
60Hz
41.5A
8600VA
0.8 Leading- 0.8 Lagging
105-500Vdc
AC Power Factor Range
GRID OUTPUT
LISTED
intergrated
PV AFCI
TYPE 1
268693
41A
9460VA
OTHER
Enclosure Type Type 4X
PV INPUT
Inverter
SN:
UL 1741 / UL 1699B
UL 62109-1 / CSA107.1
59.3Hz-60.5Hz
Operating Frequency Range
GRID SUPPORT UTILITY-INTERACTIVE
TRANSFORMERLESS INVERTER
208Vac
240 Vac
Operating Temperature -68℉~+140℉ no
derating belo w 113℉
3.4 Identification of A1 Series
Nominal AC Voltage
Max.Continuous Power
Max.Continuous Current
Nominal AC Frequency 60Hz
41.5A
8600VA
0.8 Leading- 0.8 LaggingAC Power Factor Range
LISTED
intergrated
PV AFCI
TYPE 1
268693
41A
9460VA
OTHER
Enclosure Type Type 4X
Inverter
SN:
SolaX Power Network Technology (Zhe jiang) CO., LTD.
ADD:No.288 Shizhu Road,Tonglu Economic Development Zone,
TEL: [phone] E-mail: [e-mail]
www.solaxpower.com MADEINCHINA
Dongxing District,Tonglu City, Zhejiang Province, China.
612.0 1344.00
UL 1741 / UL 1699B
UL 62109-1 / CSA107.1
59.3Hz-60.5Hz
Operating Frequency Range
208Vac
240 Vac
Operating Temperature -68℉~+140℉ no
derating belo w 113℉
Series LablesModel Parameter
1. Every A1 series product of our company on the market should correspond to
a unique serial number under the unified management of the company. A1
series of machine serial number is divided into five parts: type (2 bits)+ power
(4 bits)+ year/month (2 bits)+ work order number (3 bits)+ stream number (3 bits)
a total of 14 bits.
2. Standard A1 series number preparation rules are as follows:
A1-7.0-USA1-6.0-US
60
A1 18 07 0 0 1
Modle Power Year Month Work order number Serial number
0 0 1
A1: Type A1series ---- A1: A1-XX.
60:Power ----7200 W; 70: 8400 W; 76: 9120 W; 86: 12320W.
18: Year ------ 18: 2018 (17: 2017; 19: 2019......)
07:Month ------ July (09: September; 10: Octover ; 11: November)
001:Work order number---- 001:001~999 (Reset every month)
001:Serial number---- 001:001~ZZZ (Clear each work order).

Technical Data
0
4 Technical Data
4.1 DC Input
4.2 Grid
Max. recommended DC power [W]
Max. DC power per MPPT [W]
Max. DC voltage[V]
Norminal DC operating voltage[V]
Operating voltage typical [V]
Full rating voltage range [V]
Max. input current Per MPPT[A]
Max. short circuit current [A]
System startup voltage [V]
Number of MPPT/INPUTs per MPPT
Backfeed current to PV array
7200
3600
600
360
105-500
360-500
10
12.5
150
2/1
0
Model
8400
3600
600
360
105-500
280-500
10
12.5
150
3/1
0
9120
3600
600
360
105-500
304-500
10
12.5
150
3/1
0
10320
3600
600
360
105-500
258-500
10
12.5
150
4/1
0
Norminal AC power[VA]
Rated grid frequency (range)[Hz]
Norminal AC current @208V[A]
Max. AC current @208V[A]
Norminal AC current @240V[A]
Max. AC current @240V[A]
Displacement power factor
Total harmonic distortion(THDi)
Load control
6000
29
32
25
28
7000
34
37
29
32
7600
37
40
32
35
8600
41.5
41.5
36
41
208Y/120 Vac（183Y/105.5Vac - 228Y/131.5 Vac）
120 / 240 Vac split phase（105.5/211 Vac - 132/264 Vac ）
60 (59.3~60.5)
0.8 leading...0.8 lagging
< 3%
optional
765/232
A1-Hybrid-7.0-US A1-Hybrid-7.6-US A1-Hybrid-8.6-US
Model
A1-Hybrid-6.0-US
Max. apparent AC power[VA] 6600 7700 9460(240V)
A1-6.0-US A1-7.0-US A1-7.6-US A1-8.6-US
A1-Fit-7.0-US A1-Fit-7.6-US A1-Fit-8.6-US
A1-7.0-US A1-7.6-US A1-8.6-USA1-6.0-US
Model A1-7.0-US A1-7.6-US A1-8.6-USA1-6.0-US
14 15
8360
Max. output fault current[A]/duration(ms)
4.3 Efficiency, Safety and Protection
YES
Varistor
Pre-start RISO
YES
YES
YES
YES
YES
I/IV
Max. PV-AC
CEC efficiency
Safety & Protection
DC disconnect device
Over voltage protection type
PV array ground fault detection
Ground fault monitoring
Grid monitoring
AC short circuit protection
ALL-pole sensitive RCMU
ARC fault circuit interrupter(AFCI)
Protection class/over voltage category
98.50%
97.00%
98.50%
97.00%
98.50%
97.00%
98.50%
97.00%
Model A1-7.0-US A1-7.6-US A1-8.6-USA1-6.0-US
4.4 General Data
Dimension (L*W*D)
Package dimension (L*W*D)
Weight
Package weight
Enclosure rating
Operation temperature range
Storage temperature range
Relative humidity
913*560*276mm(36*22*10.9in)
1016*667*397mm(40*26.3*15.6in)
56kg(123 lb)
60kg(132 lb)
Model
Type 4X
-4℉～+140℉,no derating below +113℉
-4℉～+140℉
A1-7.0-US A1-7.6-US A1-8.6-USA1-6.0-US
0-100% RH Condensing
＜20W
transformerless
Natural convection
UL1741,UL1741SA,IEEE1547,IEEE1547.1;CSA-C22.2N.107.1-01
Noise
Max. operation altitude without derating
Internal power consumption
Topology
Cooling concept
＜35dB
2000m
Safety and EMC UL1699B,FCC part15 CLASS B
Technical Data
Rated grid voltage(range)[V]

Technical Data
16 17
Display
LED
Touch button
Communication interface
Communication protocol
Firmware update
Meter
Warranty
LCD
3
4
RS485/LAN/WIFI(optional)/4G(optional)/RF(optional)
Model
Modbus/Sunspec.RTU
Local USB/Remote web
RS485
A1-7.0-US A1-7.6-US A1-8.6-USA1-6.0-US
5years (10 years optional)
4.5 HMI
Installation
H
I
J
Meter*1/ CT*2 (optional)
User manual
Warranty card
Wifi module (optional)
5 Installation
5.1 Check for Physical Damage
5.2 Packing List
Make sure the inverter is intact during transportation. If there is any visible
damage, such as cracks, please contact your dealer immediately.
Open the package and take out the product, please check the accessories first.
The packing list is shown as below.
Object
A
B
C
D
E
F
Inverter*1
Bracket*2
Expansion tubes*12( for mounting )
Expansion screws*12( for mounting )
3 PIN terminals ( for Meter connection and RPSD connection )
Description
G
AB C D
E F H I
J
G
6 PIN terminals*1 ( for EPO connection )

18
19
InstallationInstallation
Mounting Environment
A1 Series inverter is designed for outdoor installation (Type 4X).
Make sure the installation site meets the following conditions:
Not in direct sunlight.
Not in areas where highly flammable materials are stored.
Not in potential explosive areas.
Not in the cool air directly.
Not near the television antenna or antenna cable.
Not higher than altitude of about 2000m above sea level.
Not in environment of precipitation or humidity (＞95%).
Under good ventilation condition.
The ambient temperature in the range of -20℃ to +60℃.
The slope of the wall should be within ±5°.
The wall hanging the inverter should meet conditions below:
1.solid brick/concrete, or strength equivalent mounting surface;
2.Inverter must be supported or strengthened if the wall’s strength isn’t
enough(such as wooden wall, the wall covered by thick layer of decoration)
Please AVOIDE direct sunlight, rain exposure, snow laying up during installation
and operation.
5.3 Mounting Dimensions for Mounting
Ø
Recommended Clearances
Ø
If multiple inverters are mounted in areas with high ambient temperatures ,
increase the clearances between the inverters and ensure an adequate fresh-air
supply, if possible.
300mm 300mm300mm

Installation Installation
20 21
crimping pliers for binding post and RJ 45, screwdriver, manual wrench
and driller.
Installation Tools
Ø
Required Torques for Mounting
Ø
Part Required torque
Mounting expansion screw 92 Ibf.in
Install hex socket screws
2.3 Ibf.in
Straight screw for communication board terminal
and electricity meter
23 Ibf.in
Straight screws for terminal board and grounding
bar
13.8 Ibf.in
Lock the communication board screw inside the
box
23 Ibf.in
Install a waterproof plug 13.8 Ibf.in
Mounting Steps
Ø
Step 1: Screw the wall bracket on the wall
Step 2: Place the inverter on the wall mounted bracket by holding the handle on
the side.
Note: If necessary, customer can install an anti-theft lock on the left-bottom of the
inverter.
1.1 Place the two brackets on the wall and mark down the positions of the 12
holes. ( Please make sure the distance bewteen two brackets according to the
section “ dimension of mounting”. )
1.2 Drill holes with driller, and make sure the holes are deep enough (at least
60mm) to support the inverter.
1.3 Install the expansion tubes in the holes, and tighten them. Then install the
wall braket with the expansion screws.

Electrical Connection
22
23
6. Electrical Connection
DANGER!
Danger to life due to high voltages of the PV array
When exposed to sunlight, the PV array generatd dangerous DC
voltage which is present in the DC conductors and the live components
can lead to lethal electric shocks. If you unplug the terminal plate with
the connected DC conductors from DC-in slot under load, an electric
arc may occur, which can cause an electric shock and burns.
- Do not touch non-insluated conductors.
- Do not touch the DC conductors.
- Do not touch any live components of the inverter.
WARNING!
All electrical installations must be carried out in accordance with
the local electrical standards and the National Electrical Code
ANSI/NFPA 70 or the Canadian Electrical Code CSA C22.1.
Before connecting the inverter to the grid, contact your local grid
operator. The electrical connection of the inverter must be carried
out by qualified persons only.
WARNING!
Damage to seals on the enclosure lids in subfreezing condition
If you open the enclosure lids of the wiring box when temperatures are
below freezing, the enclosure lid seal could be damaged. As a result,
moisture can get into the wiring box.
Only open the enclosure lid of the wiring box if the ambient
temperature is at least 0℃ and there is no frost.
WARNING!
Damage to the inverter due to electrostatic discharge
Touching electronic components can cause damage to or destory the
inverter through electrostatic discharge.
Grounding yourself before touching any component.
WARNING!
Damage to the inverter due to moisture ingress during installation
Never open the inverter when it is raining or snowing, or the humidity
is over 95%.
For attaching the conduits to the enclosure, only use UL-listed rain-tight
conduit fittings or UL=listed conduit fittings for wet locations complying
with UL514B.
Seal all unused openings tightly.
Electrical Connection
6.1 Overview of all Electrical Wirings Method
All electrial wiring will be done in the wiring box, and all elelctrical wiring
method is similar. Therefore this section will introduce all electrical wiring
steps and requirements.
Removing the Wiring Box Cover
Ø
Required Wire Size and Torques
Ø
Terminals Required torqueWire size permitted
PV terminals
Grid terminals
Grounding block
Part Required torque
Removing wiring box cover screw
Removing conduit fitting
Step 1: Turn DC switch in “ OFF” position. Please note the cover can not be removed
when the DC swtich is in “ON” position.
Step2: Remove the 4 cover screws, then remove the cover.
Max. 23 Ibf.in
Max. 13.8 Ibf.in
14AWG,600V,90℃Max.11.5 Ibf.in
8AWG,120V,90℃ for A1-6.0/7.0-US
6AWG,120V,90℃ for A1-7.6/8.6-US
Max.11.5 Ibf.in

Electrical Connection Electrical Connection
Removing Wiring Box Waterproof Plugs
Ø
A1 series inverter has 3 1-ED holes and 2 1/2-ED holes for wiring connection.
And the 3 1-ED holes are used for electrical wiring connection.
7 1-ED conduit plugs and 3 1/2-ED conduit plugs has been installed on inverter at
the factory.
Before wiring connection, these conduit plugs should be removed by the operator.
Step1: Remote these conduit by placing a flat blade screwdriver in the slot on the
conduit plug face and turning while gripping the nut on the inside of the enclosure
to ensure it does not slip.
Step2: Unscrew the nut from the conduit plug and slip the conduit plug out of the
conduit opening.
Conduit Installation and Wiring Routing
Ø
1-ED
1/2-ED
1-ED 1-ED
1-ED 1-ED
1/2-ED 1/2-ED
Operator should use the standard size conduit which must fit with the holes on the
bottom of the inverter. And conduit fittings needs to be water tight, and insulated
type preferred.
Once conduit and fittings are installed, wirings should go through the conduit and
be locked into the corresponding terminals (refer to next section in details) .
conduit
wirings
24 25
Connecting Electrical Wirings to Terminals
Ø
Step1: Choose the appropriate wire according to specific connection.
Step2: Remove of insulation from the end of wire.12mm
Step e3: Insert stripped wires into terminal and nsure that all conductor strands
are captured in the terminal.
Step4: Compress the terminal head by using a crimping pliers and screw AC
down screw cap tightly.
trip length conduit
12mm
wirings

Electrical ConnectionElectrical Connection
26 27
6.2 PV Connection
WARNING!
Ensure no live voltages are present on pv input and AC output
circuit, and verify that the DC disconnect, AC disconnect, and
dedicated AC circuit breaker are in the “OFF” position, before
installation.
WARNING!
Please use a dark opaque sheets to cover the PV solar panels
before any wiring or connecting.
NOTE!
PV connection mode below is NOT allowed!
Inverter
PV array
PV1
PV2
+
-
+
-
+
-
+
-
+
-
x
WARNING!
Power fed from more than one source, more than one live circuit.
Please note that all DC and AC terminals may carry current even
without connected wires.
WARNING!
Ensure maximum protection against hazardous contact voltages
while assembling PV panels installations, both the positive and
negative leads must be strictly isolated electrically from the
protective ground potential(PE).
CAUTION!
Never reverse the polarity of the array string cables since inverter
would be damage. Always ensure correct polarity.
WARNING!
Select PV modules with excellent function and reliable quality.
Open-circuit voltage of module arrays connected in series should
be less than inverter Max. DC input voltage 500V.
Inverter warranty is vold if the DC input voltage exceeds the inverter
500V maximum.
WARNING!
Electric Shock Hazard. The DC conductors of this photovoltaic
system are normally ungrounded but will become intermittently
grounded without indication when the inverter measures the PV
array isolation.
DANGER!
DANGER — HIGH VOLTAGE;
DANGER — HAUTE TENSION
WARNING!
Electric Shock Hazard. The DC conductors of this photovoltaic
system are ungrounded and may be energized.
WARNING!
PV ARRAY IS GROUNDED DURING ISO check AND UNGROUNDED
DURING normal operation. REFER TO MANUAL. DISCONNECT AND
TEST BEFORE SERVICING THE INVERTER OR THE ARRAY.
AVERTISSEMENT!
LE GÉNÉRATEUR PV EST MIS À LA TERRE DURANT ISO CHECK ET
N’EST PAS MIS À LA TERRE DURANT NORMAL OPERATION. VOIR LE
MANUEL. DÉBRANCHER ET METTRE À L’ESSAI AVANT DE FAIRE
L’ENTRETIEN DE L’ONDULEUR OU LE GÉNÉRATEUR.

A1 Series inverter can be connected with PV modules in series with 2 MPPTs
for 6.0KW, 3 MPPTs for 7.0KW and 7.6KW , 4 MPPTS for 8.6KW.
The inverter is to be installed in accordance with NFPA 70, including Sec.
690.35 with an ungrounded PV array.
PV String Connection
For A1-8.6 inverter,
4 strings need to be connected
as shown in the picture on the
right.
For A1-7.6 inverter and A1-7
inverter,
3 strings need to be connected
as shown in the picture on the
right.
For A1-6.0 inverter,
2 strings need to be connected
as shown in the picture on the
right.
Electrical ConnectionElectrical Connection
28 29
PV Fuse Information
The provided string fuses may or may not be appropriate for user particular
installation. Proper sizing of overcurrent protection is based on the maximum
short circuit current Isc of module and calculated in accordance with NEC Article
690 requirement.
Selecting Appropriate Fuse
The string fuse rating should never exceed the Maximum Series Fuse rating
provided by the module manufacturer. This value is typically listed on the module
label.
The minimum string fuse size is calculated by multiplying the module Isc*1.56.
It is recommended to use the same brand fuse as the fuse provided with inverter.
A partial listing of the Littlefuse KLKD Fuses is shown as below.
KLKD 008 - 8A KLKD 009 - 9A KLKD 010 - 10A
KLKD 012 - 12A KLKD 015 - 15A KLKD 020 - 20A
if user perefer to use other brand fuse, the requirements shown as below must be
satisfied:
Fast-acting
Dimensions: 38.1mm in length and 10.31 fuse diameter. ( refer to picture below)
Interrupt Rating: >=10KA@600Vdc
UL and CSA approval of the fuse is manatroy
String fuse can be sized from 1A to MAX. 20A and rated for 600Vdc.
38.1mm ( 1.50") 10.31mm ( .406")
A1 Series inverter are shipped with several 15A 600Vdc Littelfuse KLKD 15 string
fuses.
A1-6.0 with 4 fuses A1-7.0 with 6 fuses
A1-7.6 with 6 fuses
A1-8.6 with 8 fuses
Ø
Ø
Terminals Required torqueWire size permitted
PV terminals 14AWG,600V,194℉max.11.5 Ibf.in
+-+-+-+-
+-+-+-
+-+-
Please refer to section 6.1 to get detailed wiring method.

String Fuse Replacement
String fuses are on the wiring broad on the wring box. Before replacing the fuses,
ensure no live voltage are present on PV input and AC circuit, and verify that the
DC disconnect, AC disconnect, and dedicated AC branch circuit breaker are in
the “OFF” position.
Step1: Pry the replaced fuse out
of the slot by using a flat blade
screwdriver slowly and gently.
fuses
wiring broad
wring box
Step2: Put the new fuse on the
slot and press it into the solt
with thumb strongly, and make
sure the fuse is fixed tightly.
Electrical ConnectionElectrical Connection
30 31
6.3 Grid Connection
A1 Series inverters are grid-tied to the public utility.
The connection procedure will vary depending on the grid configuration.
The following table provides an overview of the compatible grid configurations,
which voltage limit, frequency limit and conductors have to be connected to the
inverter to comply with the grid configuration. If applicable, which country data
set has to be set.
As standard, the inverter is meant for connection to a utility grid with a
240V/120V split-phase 60Hz system, and the country data set UL1741 is factory-
set.
CAUTION!
The installer is responsible for providing overcurrent protection.
To reduce the risk of fire, connect only to a circuit provided with 63
amperes maximum branch-circuit overcurrent protection in
accordance with the National Electrical Code, ANSI/NFPA 70.
Ø
Public Grid Configuration Allowed:
L1
L2
N
240V/120V Split Phase AC Grid
240V 180
L1
L2
N
L1
L2
N
L1
L2
N
240V 120
240V 120
240V 120
L1 L2
L3
240V Delta AC Grid
Ø
CAUTION!
utility interconnection may require approval from the authority
having jurisdiction.

L1 L2N
240V/120V split-phase
L1, L2, N
Grid Terminal Connection
Ø
Terminals Required torqueWire size permitted
Grid terminals max.1N.m (11.5 Ibf.in)
8AWG,120V,194℉ for A1-6.0/7.0-US
6AWG,120V,194℉ for A1-7.6/8.6-US
L1
L2
N
L1
L2
N
L1
L2
N
208V 120
208V 120
208V 120
L1 L2
L3
208V Delta AC Grid
L1
L2
N
240V/120V Stinger AC Grid
240V 120
240V 120 240V 120
L1 L2N
240V Delta AC Grid
240V Stringer connection
208V Delta AC Grid
L1, L2
L1 L 2N+ -
AC Circuit Breaker Requirements
There should be a AC circuit breaker to protect each AC line(L1 and L2) of A1
Series inverter. The circuit breaker should be able to handle the rated maximum
output voltage and current of the inverter.
Please refer to the table below to determine the appropriate circuit breaker size to
avoid potential fire hazards. And the AC circuit breaker selection and installation
must follow the National Electrical Code(NEC), ANSI/NFPA 70 or local electrical
codes.
A1 Series Inverter
AC circuit breaker Utility
A1-6.0-US
Inverter model Recommended AC branch protection
A1-7.0-US
A1-7.6-US
A1-8.6-US 63A 120/240 Vac, 15 KA
Max. AC output current
Grid Port
32A
41.5A
40A
37A
63A 120/240 Vac, 15 KA
63A 120/240 Vac, 15 KA
50A 120/240 Vac, 15 KA
Ø
32 33
Please refer to section 6.1 to get detailed wiring method.

Electrical Connection
34 35
There are ten ports on the Ground Bus-bar. Any one of them can be
connected with the earth wiring. The earth wiring shall be connected to the
exterior Ground Bus-bar
6.4 Ground Connection
User can additionally earth the inverter to the enclosure of a second earthing
or equipotential bonding if it is required by local safety. This prevents electric
shock if the original protective conductor fails.
Ground Wire Connection
Ø
Terminals Required torqueWire size permitted
Grounding block Max.11.5 Ibf.in
8AWG,120V,194℉ for A1-6.0/7.0-US
6AWG,120V,194℉ for A1-7.6/8.6-US
WARNING!
WHEN A GROUND FAULT IS INDICATED, NORMALLY UNGROUNDED
CONDUCTORS MAY BE GROUNDED.
AVERTISSEMENT!
LORSQU’UN DÉFAUT À LA TERRE EST SIGNALÉ, LES CONDUCTEURS
QUI, NORMALEMENT, NE SONT PAS MIS À LA TERRE PEUVENT ÊTRE
MIS À LA TERRE.
7 Communication Cables Connection
7.1 Overview of all Communication Cables Method
ALL communication cables will be done on the communication broad which
is in the wiring box, and all communication cables method is similar. Therefore
this section will introduct all communication cables steps and requirements.
Required Wire Size and Torques
Ø
Terminals Required torqueWire size permitted
LAN terminal
Meter terminal
WIFI terminal
USB terminal
RF terminal
Type
RJ45
3-pin terminal block
USB
RPSD terminal 3-pin terminal block
USB
USB
in the wiring box
-
-
-
-
-
-
2.3 Ibf.in
Plug-in
RPSD
Meter
LAN
BMS
communication broad
EPO
EPO terminal 6-pin terminal block
RJ45, 8-conductor
CAT5 non-crossover
20AWG
20AWG
20AWG
2.3 Ibf.in
2.3 Ibf.in
Communication Cables Connection
Please refer to section 6.1 to get detailed wiring method.

Communication Cables ConnectionCommunication Cables Connection
36 37
Removing the Communication Broad
Ø
Step1: Make sure the DC switch is in “OFF” position before removing the
communication broad.
Step2: Remove the 2 cover screw, then remove the broad.
Removing communication broad cover screw
Part Required torque
Removing conduit fitting
Conduit Installation and Wiring Routing
Ø
Operator should use the standard size conduit which must fit with the holes on the
bottom of the inverter. And conduit fittings needs to be water tight, and insulated
type preferred.
Once conduit and fittings are installed, wirings should go through the conduit and
be locked into the corresponding terminals (refer to next section in details) .
It is recommended that all communication cables should be connected through
two conduits from right hand side on the bottom of the inverter.
conduit
conduits for
electrical connections
conduits for
commumication
connections
13.8 Ibf.in
13.8 Ibf.in
wirings
ØConnecting Wirings to Terminal Block
Step1: Find the male terminal block in the accessories package.
Step : Choose the appropriate wire according to specific connection.2
Step : Remove of insulation from the end of wire.3 5mm
Step4: Insert stripped wires into male terminal and ensure that all
conductor strands are captured in the terminal.
Step5: Compress the male terminal head by using a crimping pliers and screw
down screw cap tightly.
Step6: Plug the male terminal block into the corresponding female terminal
block on the communication broad tightly.
trip length conduit
5mm
wirings
Step2/3
6-pin*13-pin*2
Step1
2-pin*1
Terminals Required torqueWire size permitted
Meter terminal
RPSD terminal
EPO terminal
Type
2.3 Ibf.in
20AWG
20AWG
20AWG
2.3 Ibf.in
2.3 Ibf.in
3-pin terminal block
3-pin terminal block
6-pin terminal block