SunSynk SUN300G3-EU-230 Instruction Manual

v.2 (02/01/23)
INSTALLATION/USER MANUAL
SUN300G3-EU-230/SUN500G3-EU-230/SUN600G3-EU-230/
SUN800G3-EU-230/SUN1000G3-EU-230/SUN1300G3-EU-230/
SUN1600G3-EU-230/SUN1800G3-EU-230/SUN2000G3-EU-230
Global Tech China Ltd, 3 Floor, Wai Yip Industrial Building.
171 Wai Yip Street, Kwun Tong, Kowloon, Hong Kong.
Tel: [phone] Fax: [phone]
www.sunsynk.com / [email protected]
Photovoltaic Grid-connected
Microinverter(Built-in WIFI-G3)

MICRO INVERTER | User Manual2
Table of Contents
1. SAFETY 4
1.1. General Safety 4
1.2. Safety Instructions 5
1.3. Radio Interference Statement 5
1.4. The Meaning of Symbols 6
2. MICROINVERTER SYSTEM INTRODUCTION 7
2.1. Microinverter Maximize PV Energy Production 8
2.2. More Reliable than Centralized or String Inverters 8
2.3. Simple to Install 8
3. MICROINVERTER INTRODUCTION 9
4. MICROINVERTER SYSTEM INSTALLATION 9
4.1. Additional Installation Components 10
4.2. Required Parts and Tools 10
4.3. Parts List 10
5. INSTALLATION PROCEDURES 11
6. MICROINVERTER SYSTEM OPERATING INTRODUCTIONS 15
6.1. To operate the microinverter PV system 15
7. TROUBLESHOOTING 16
7.1. Status Indications and Error Reporting 16
7.2. Troubleshooting a non-operating Microinverter 16
8. REPLACEMENT 18
9. TECHNICAL DATA 19
9.1. 300G3/500G3/600G3 Specication 19
9.2. 800G3/1000G3 Specication 20
9.3. 800G3/1000G3 Specication 21
10. WIRING DIAGRAMS 23
11. MONITORING PLATFORM 27

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12. HOW TO CONFIGURE THE MICROINVERTER TO THE ROUTER VIA
WEB 28
13. HOW TO CONNECT IN APP 32
13.1. Registration 32
13.2. Create a Plant 32
13.3. Add a Logger 33
13.4. Network Conguration 33

MICRO INVERTER | User Manual4
This manual contains important instructions to follow during the installation and maintenance of the
Photovoltaic Grid-connected Inverter(Microinverter). To reduce the risk of electrical shock and ensure
the safe installation and operation of the Microinverter, the following symbols appear throughout this
document to indicate dangerous conditions and important safety instructions.
Specications are subject to change without notice - please ensure you are using the latest manual
found on the manufacturer's website.
WARNING This symbol indicates information that if ignored, could result in personal
injury or even death due to incorrect handling.
CAUTION This symbol indicates information that if ignored, could result in personal
injury or physical damage due to incorrect handling.
PLEASE NOTE Indicates information that is considered important, but not hazard-related.
1. SAFETY
1.1. General Safety

MICRO INVERTER | User Manual5
1.2. Safety Instructions
DO NOT disconnect the PV module from the Microinverter without disconnecting the AC power.
Only qualied professionals should install and/or replace the Microinverter.
Perform all electrical installations in accordance with local electrical codes.
Before installing or using the Microinverter, please read all instructions and cautionary markings in the
technical documents, the Microinverter system, and the solar array.
Be aware that the body of the Microinverter is the heat sink and can reach a temperature of 80 ºC. To
reduce the risk of burns, do not touch the body of the Microinverter.
DO NOT attempt to repair the Microinverter. If it fails, contact technical support to obtain an RMA num-
ber and start the replacement process. Damaging or opening the Microinverter will void the warranty.
1.3. Radio Interference Statement
CE EMC Compliance: The equipment can comply with CE EMC, designed to protect against harmful inter-
ference in a residential installation. The equipment could radiate radio frequency energy, which might cause
harmful interference to radio communications if not following the instructions when installing and using the
equipment. But there is no guarantee that interference will not occur in a particular installation. If this equip-
ment causes harmful interference to radio or television reception, the following measures might resolve the
issues:
A) Relocate the receiving antenna and keep it well away from the equipment.
B) Consult the dealer or an experienced radio / TV technician for help.
Changes or modications not expressly approved by the party responsible for compliance may void the
user's authority to operate the equipment.
CAUTION
The external protective earthing conductor is connected to the inverter protective earthing terminal
through AC connector. When connecting, connect the AC connector rst to ensure the inverter earthing,
then make the DC connections. When disconnecting, disconnect the AC by opening the branch circuit
breaker rst but maintain the protective earthing conductor in the branch circuit breaker connected to
the inverter, then disconnect the DC inputs.
In any circumstance, DO NOT connect the DC input when the AC connector is unplugged.
Please install isolation switching devices on the AC side of the inverter.

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1.4. The Meaning of Symbols
Can be OEM Trademark.
Caution, risk of electric shock.
Caution, risk of burn - Do not touch.
Caution, hot surface.
The symbol for the marking of electrical and electronic devices according to
Directive 2002/96/EC. Indicates that the device, accessories and packaging
must not be disposed of as unsorted municipal waste and must be collected
separately at the end of the usage. Please follow Local Ordinances or Regula-
tions for disposal or contact an authorized manufacturer representative for
information concerning the decommissioning of equipment.
CE mark is attached to the solar inverter to verify that the unit follows the pro-
visions of the European Low Voltage and EMC Directives.
Refer to the operating instructions.
Qualied personnel
A person adequately advised or supervised by an electrically skilled person to
enable him or her to perceive risks and to avoid hazards which electricity can
create. For the purpose of the safety information of this manual, a "qualied
person" is someone who is familiar with requirements for safety, refrigeration
system and EMC and is authorized to energize, ground, and tag equipment,
systems, and circuits in accordance with established safety procedures. The
inverter and endues system may only be commissioned and operated by
qualied personnel.

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2. MICROINVERTER SYSTEM INTRODUCTION
The Microinverter is used in utility-interactive grid-tied applications, comprised of two key elements: · Mi-
croinverter · Router This series microinverter has a built-in WIFI module so it can communicate with the
router directly.
300 / 500 / 600 / 800 / 1000G3
1300 / 1600 / 2000G3
Meter
Distribution
Box
Ground
Neutral
PV
Module
Microinverter
Router Monitoring system
WIFI Boost
Meter
Distribution Box
Microinverter
Ground
Neutral
PV
Module
Router Monitoring system
WIFI Boost

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PLEASE NOTE
Suppose the wireless signal in the area where the micro inverter is weak. In that case, adding a wi
signal booster is necessary at a suitable place between the router and the microinverter.
This integrated system improves safety; maximizes solar energy harvest; increases system reliability, and sim-
plies solar system design, installation, maintenance, and management.
2.1. Microinverter Maximize PV Energy Production
Each PV module has individual Maximum Peak Power Tracking (MPPT) controls, which ensure that the
maximum power is exported to the utility grid regardless of the performance of the other PV modules in the
array. When PV modules in the array are aected by shade, dust, orientation, or any situation in which one
module underperforms compared with the other units, the Microinverter ensures top performance from the
array by maximizing the performance of each module within the array.
2.2. More Reliable than Centralized or String Inverters
The distributed Microinverter system ensures that no single point of system failure exists across the PV
system. Microinverter are designed to operate at full power at ambient outdoor temperatures of up to 149ºF
(65ºC). The inverter housing is designed for outdoor installation and complies with the IP65 environmental
enclosure rating.
2.3. Simple to Install
You can install individual PV modules in any combination of Module quantity, orientation, dierent types and
power rates. The Ground wire (PE) of the AC cable is connected to the chassis inside of the Microinverter, po-
tentially eliminating the installation of grounding wire (check local regulation). Data collection adopts internal
wi, and the wireless router is needed near the microinverter. When installing the microinverter, congure
the wireless router with internal wi(refer to the wi user manual). The data will be uploaded automatically.
Users can monitor and manage the microinverter through the corresponding website or APP.

MICRO INVERTER | User Manual9
3. MICROINVERTER INTRODUCTION
The Microinverter connect with the single-phase grid and can also use multiple Microinverter in the form of
a single-phase grid to achieve a three-phase grid. For more information, please see this manual's Technical
Data page (P17~20).
Model Number AC grid Max. # Per branch
SUN300G3-EU-230 50/60Hz, 230V 17 for 25A breaker
SUN500G3-EU-230 50/60Hz, 230V 10 for 25A breaker
SUN600G3-EU-230 50/60Hz, 230V 8 for 25A breaker
SUN800G3-EU-230 50/60Hz, 230V 6 for 25A breaker
SUN1000G3-EU-230 50/60Hz, 230V 5 for 25A breaker
SUN1300G3-EU-230 50/60Hz, 230V 4 for 25A breaker
SUN1600G3-EU-230 50/60Hz, 230V 4 for 45A breaker
SUN2000G3-EU-230 50/60Hz, 230V 3 for 45A breaker
4. MICROINVERTER SYSTEM INSTALLATION
A PV system using Microinverter is simple to install. Each Microinverter easily mounts on the PV racking
directly beneath the PV module(s). Low-voltage DC wires connect from the PV module directly to the Microin-
verter, eliminating the risk of high DC voltage. Installation MUST comply with local regulations and technical
rules.
Special Statement! An AC GFCI device should not be used to protect the dedicated circuit to the microinvert-
er, even though it is an outside circuit. None of the small GFCI devices (5~30mA) is designed for back feeding
and will be damaged if back feeding. Similarly, AC AFCIs have not been evaluated for back feeding and may
be damaged if back feeding with the output of a PV inverter.
WARNING
Perform all electrical installations in accordance with local electrical codes.
Only qualied professionals should install and/or replace Microinverter.
Before installing or using a Microinverter, please read all instructions and warnings in the
technical documents, on the Microinverter system itself, and on the PV array.
Be aware that installation of this equipment includes the risk of electric shock.
Do not touch any live parts in the system, including the PV array, when the system has
been connected to the electrical grid.
PLEASE NOTE
It strongly recommends installing Surge Protection Devices in the dedicated meter box

MICRO INVERTER | User Manual10
4.1. Additional Installation Components
AC Male and Female Interconnection Connectors (sold separately)
Sealing end caps(sold separately)
4.2. Required Parts and Tools
In addition to your PV array and its associated hardware, you will need the following items:
An AC connection junction box;
Mounting hardware suitable for module racking;
Sockets and wrenches for mounting hardware;
Continuous grounding conductor and grounding washers;
A Phillips screwdriver;
A torque wrench;
4.3. Parts List
Please check the following table to see whether all the parts are included in the package:
User
manual
Microinverter x1 User manual x1 AC power connectors x1
(optional)
*Antenna for WIFI module x1
* This antenna is for a microinverter that has a built-in wi module.

MICRO INVERTER | User Manual11
Step 1: Install the AC branch circuit junction box.
a. Install an appropriate junction box at a suitable location on the PV racking system (typically at the end of
a branch of modules).
b. Connect the open wire end of the AC cable into the junction box using an appropriate gland or strain
relief tting.
c. Wire the conductors of the AC(230/400Vac): L - red; N - black; PE - yellow green.
d. Connect the AC branch circuit junction box to the point of utility Interconnection.
WARNING
The wiring color code can be dierent according to local regulations. Check all the installation wires
before connecting to the AC cable to be sure they match. Wrong cabling can damage the microin-
verters irreparably. The warranty does not cover such an issue.
Step 2: Attach the Microinverter to the racking or the PV module frame.
a. Mark the location of the Microinverter on the rack concerning the PV module junction box or any other
obstructions.
b. Mount one Microinverter at each location using hardware recommended by your module racking ven-
dor.
5. INSTALLATION PROCEDURES

MICRO INVERTER | User Manual12
300 / 500G3 (1MPPT)
600 / 800 / 1000G3 (2MPPT)
Mounting
- 08 -
AC cable L=120m m
AC cable L=1940m m
AC cable L=1940mm AC cable L=120mm
1300 / 1600 / 2000G3 (4MPPT)
Mounting
AC cable L=85mm
AC cable L=1960m m
The AC wire on the micro inverter is a TC-ER wire with a wire cross-section area of 3.33mm².
WARNING
Before installing any of the microinverters, verify that the utility voltage at the point of common con-
nection matches the voltage rating on the microinverter label.
WARNING
Do not place the inverters (including DC and AC connectors) exposed to the sun, rain or snow, even
the gap between modules. Allow a minimum of 3/4 (1.5cm.) Between the roof and the bottom of the
Microinverter to allow proper airow.

MICRO INVERTER | User Manual13
Step 3: Connect the microinverter in parallel.
a. Check the Microinverter technical data page 5 for the maximum allowable number of Microinverter on
each AC branch circuit.
b. Plug the male AC connector of the Microinverter into the female connector to get it connected. AC con-
nector interface is as follows.
300/500G3 (1MPPT)
600/800/1000G3 (2MPPT)
Connect in parallel
1300/1600/2000G3 (4MPPT)
Connect in parallel
WARNING
DO NOT exceed the maximum number of Microinverters in an AC branch circuit, as displayed on
page 5 of this manual.

MICRO INVERTER | User Manual14
Step 4: Install an AC cable protective end cap at the end of AC cable.
Step 5: Connect microinverter to the PV modules.
PLEASE NOTE
When plugging in the DC cables, if AC is already available, the Microinverter should immediately blink
red light and will start work within the set time (default 60 seconds). If AC is unavailable, the red light
will blink three times quickly and repeat after one second until AC is connected.
7.5

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6. MICROINVERTER SYSTEM OPERATING INTRODUCTIONS
6.1. To operate the microinverter PV system
1. Turn ON the AC circuit breaker on each microinverter AC branch circuit.
2. Turn ON the main utility-grid AC circuit breaker. Your system will start producing power after a one-min-
ute waiting time.
3. The units should start blinking red one minute after turning on the AC circuit breaker. The blue led
blinked. This means they are producing power normally; the faster blinking of the blue led means more
power is generated.
4. Congure the internal wi module according to its user manual.
5. The Microinverter will send performance data over the wi module to the network every 5 minutes. It en-
ables customers to monitor the performance data of each microinverter through the website and APP.
PLEASE NOTE
When AC power is applied, but the microinverter is not started up, a power meter may measure about
0.1A current and 25VA(W) power for each microinverter. This power is reactive and not consumed by
the utility grid.

MICRO INVERTER | User Manual16
7. TROUBLESHOOTING
Qualied personnel can use the following troubleshooting steps if the PV system does not operate correctly:
7.1. Status Indications and Error Reporting
Status Error Reporting
Start up LED
One minute after DC power is rst applied to the microinverter; one short red
blinks indicate a successful microinverter startup sequence, be equal to or
greater than two short red blinks after DC power is rst applied to the mi-
croinverter indicate a failure during the microinverter setup
Operation LED
Flashing Slow Blue - Producing small power
Flashing Fast Blue - Producing big power
Flashing Red - Not producing power
Red blinking two times - AC low-voltage or high-voltage
Red blinking three times - Grid failure
GFDI Error
A four-time red LED indicates the Microinverter has detected a Ground Fault
Detector Interrupter (GFDI) error in the PV system. Unless the GFDI error has
been cleared, the LED will remain four times blinking.
Other Faults All other faults can be reported to the website and APP.
WARNING
Never disconnect the DC wire connectors under load. Ensure that no current is owing in the DC
wires before disconnecting. An opaque covering may be used to cover the module before discon-
necting the module.
7.2. Troubleshooting a non-operating Microinverter
There are two possible overall areas of trouble:
A. The Microinverter itself may be having problems.
B. The microinverter is working ne, but the communication between the microinverter and the network
has a problem.
The items below refer to Microinverter issues, not communication issues. One quick way to tell whether the
issue is the Microinverter or the communication problem:
1. Diagnosing from the Microinverter:
A red light–either blinking or solid on the Microinverter, or no light at all- is denitely the Microinvert-
er problem.
0 watts or 2 watts: Possibly a Microinverter problem.

MICRO INVERTER | User Manual17
2. Diagnosing from the network:
No-Data-Display: The website and APP does not display any data. Check the network conguration.
Only display microinverter is online but no data. This may be because the server is updating.
To troubleshoot a non-operating Microinverter, follow the steps below in order:
1. Verify the utility voltage and frequency are within ranges shown in the Technical Data section of this
manual.
2. Check the connection to the utility grid. Disconnect AC rst, then disconnect DC and make sure the utility
grid voltage can be measured at the AC connector. Re-connect the DC module connectors and watch for
three short LED ashes. Never disconnect the DC wires while the Microinverter is producing power.
3. Check the AC branch circuit interconnection between all the microinverter. Verify each inverter is ener-
gized by the utility grid as described in the previous step.
4. Make sure that any AC breaker is functioning properly and are closed. 5. Check the DC connections be-
tween the Microinverter and the PV module.
5. Verify the PV module DC voltage is within the allowable range shown in the Technical Data of this manu-
al.
6. If the problem persists, please contact technical support.
WARNING
Do not attempt to repair the Microinverter. If troubleshooting methods fail, please call Technical
Support.

MICRO INVERTER | User Manual18
8. REPLACEMENT
Follow the procedure below to replace a failed Microinverter:
1. Disconnect the Microinverter from the PV Module, in the order shown below:
a. Disconnect the AC by turning o the branch circuit-breaker.
b. Disconnect the AC connector of the microinverter.
c. Cover the module with an opaque cover.
d. Disconnect the PV module DC wire connectors from the Microinverter.
e. Remove the Microinverter from the PV array racking.
2. Remove the opaque cover and install a replaced Microinverter to the bracket.
a. Remember to observe the ashing LED light as soon as the new Microinverter is plugged into the DC
cables.
3. Connect the AC cable of the replacement Microinverter.

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9. TECHNICAL DATA
Model SUN300G3-EU-230 SUN500G3-EU-230 SUN600G3-EU-230
Input Data (DC)
Recommended 210~400W 210~600W 210~400W
Maximum input DC voltage 60V
MPPT voltage Range 25~55V
Operating DC voltage Range 25~60V
Max DC short circuit current 16A 16A 16A
Max input current 10.5A x1 12.5A x1 10.5A x2
Output Data (AC)
Rated output power 300W 500W 600W
Maximum output power 330W 550W 660W
Maximum output current 1.4A 2.4A 2.9A
Nominal voltage/range 230V / 184-265V
Nominal frequency 50 / 60Hz
Extended frequency/range 45~55Hz / 55~65Hz
Power factor >0.99
Maximum unit per banch 10
Max allowed altitude operating <4000m
Max inverter backfeed current to the
array 0A
Max output fault current 10A
Max output overcurrent protection 1.4A 2.4A 2.9A
Eciency
CEC weighted eciency 95%
Peak inverter eciency 96.5%
Static MPPT eciency 99%
Night time power consumption 50mW
Mechanical Data
Ambient temperature range -40 ºC ~ +65 ºC
Dimensions(WxHxDmm) 212x229x40mm (Does not include cable)
Weight(kg) 3.5
Cooling Natural Convection - No Fans
Enclosure environmental rating IP67
Protective class Class III
Features
Compatibility Compatible with 60,72 cell PV modules
Communication Power line / Wi / Zigbee
Compliance EN50549,VDE0126,VDE4105,IEC62109,CE,INMETRO
Warranty 10 Years
9.1. 300G3/500G3/600G3 Specication

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9.2. 800G3/1000G3 Specication
Model SUN800G3-EU-230 SUN1000G3-EU-230
Input Data (DC)
Recommended input power (STC) 210~600W
Maximum input DC voltage 60V
MPPT voltage Range 25~55V
Operating DC voltage Range 25~60V
Max DC short circuit current 16A
Max input current 12.5A x2
Output Data (AC)
Rated output power 800W 1000W
Maximum output power 880W 1100W
Maximum output current 3.8A 4.8A
Nominal voltage/range 230V / 184-265V
Nominal frequency 50 / 60Hz
Extended frequency/range 45~55Hz / 55~65Hz
Power factor >0.99
Maximum unit per banch 6 5
Max allowed altitude operating <4000m
Max inverter backfeed current to the array 0A
Max output fault current 10A
Max output overcurrent protection 3.8A 4.8A
Eciency
CEC weighted eciency 95%
Peak inverter eciency 96.5%
Static MPPT eciency 99%
Night time power consumption 50mW
Mechanical Data
Ambient temperature range -40 ºC ~ +65 ºC
Dimensions(WxHxDmm) 212x229x40mm (Does not include cable)
Weight(kg) 3.5
Cooling Natural Convection - No Fans
Enclosure environmental rating IP67
Protective class Class III
Features
Compatibility Compatible with 60,72 cell PV modules
Communication Power line / Wi / Zigbee
Compliance EN50549,VDE0126,VDE4105,IEC62109,CE,INMETRO
Warranty 10 Years