SunSynk SUN300G3-EU-230 Instruction Manual

Version 1.2 (12/08/2020)
Photovoltaic Grid-connected
Microinverter (Built-in WIFI-G3)
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]m / www.globaltechhk.com

INDEX
1. IMPORTANT SAFETY INSTRUCTIONS................................................................................................4
1.1. RADIO INTERFERENCE STATEMENT ..........................................................................................................5
1.2. SYMBOLS.................................................................................................................................................5
2. MICROINVERTER SYSTEM INTRODUCTION .....................................................................................6
2.1. MICROINVERTERS MAXIMIZE PV ENERGY PRODUCTION............................................................................7
2.2. MORE RELIABLE THAN CENTRALIZED OR STRING INVERTERS .....................................................................7
2.3. INSTALLATION -SIMPLICITY .....................................................................................................................8
3. MICROINVERTER INTRODUCTION......................................................................................................8
4. MICROINVERTER SYSTEM INSTALLATION.......................................................................................8
4.1. ADDITIONAL INSTALLATION COMPONENTS..............................................................................................9
4.2. REQUIRED PARTS AND TOOLS (USER SUPPLIED) .......................................................................................9
5. INSTALLATION PROCEDURES............................................................................................................9
6. MICROINVERTER SYSTEM OPERATING INSTRUCTIONS.............................................................13
7. TROUBLESHOOTING..........................................................................................................................13
7.1. STATUS INDICATIONS AND ERROR REPORTING.......................................................................................13
7.2. TROUBLESHOOTING A NON-OPERATING MICROINVETER........................................................................14
8. REPLACEMENT....................................................................................................................................15
9. TECHNICAL DATA...............................................................................................................................15
10. WIRING DIAGRAMS...........................................................................................................................19
11. MONITORING PLATFORM................................................................................................................23

LIST OF FIGURES
FIGURE 1-300G3/500G3/600G3/800G3/1000G3 MODELS......................................................................6
FIGURE 2-1300G3/1600G3/1800G3/2000G3. .......................................................................................7
FIGURE 3-INSTALLING THE AC BRANCH CIRCUIT JUNCTION BOX. ...............................................................9
FIGURE 4-300G3/500G3 (1MPPT) AND 600G3/800G3/1000G3 (2MPPT) MOUNTING............................ 10
FIGURE 5-1300G3/1600G3/2000G3 (4MPPT) MOUNTING. ................................................................... 10
FIGURE 6300G3/500G3 (1MPPT) AND 600G3/800G3/1000G3 (2MPPT) CONNECT IN PARALLEL......... 11
FIGURE 71300G3/1600G3/2000G3 (4MPPT) CONNECT IN PARALLEL.................................................. 11
FIGURE 8-L, N, AND PE CONNECTIONS.................................................................................................. 12
FIGURE 9-INSTALLING AC PROTECTIVE END CAP.................................................................................... 12
FIGURE 10 -CONNECTING THE MICROINVERTER TO THE SOLAR MODULES................................................. 12

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1. IMPORTANT SAFETY INSTRUCTIONS
This manual contains important instructions to follow when installing and maintaining the Photovoltaic
Grid-connected Inverter (Microinverter). The following symbols appear throughout this document to
indicate situations that might pose a risk to the user. These should be followed carefully, in order to
reduce the risk of electrical shock and ensure the safe installation and operation of the Microinverter.
Specifications are subjected to change without notice - please ensure you are using the latest manual
found at the manufacturer website.
◼DO NOT disconnect the PV module from the Microinverter without disconnecting the AC power.
◼Only qualified professionals should install and/or replace the Microinverters.
◼Perform all electrical installations in accordance with local electrical codes/guidelines.
◼Before installing or using the Microinverter, please read all instructions and cautionary markings in the
technical documents and 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°C. 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
number and start the replacement process. Damaging or opening the Microinverter will void the
warranty.
WARNING:
This box indicates a situation where failure to follow instructionsmay cause a serious hardware failure
or personnel danger if not followed appropriately. Use extreme caution when performing this task.
NOTE:
This box indicates information that is important for optimised Microinverter operation. Follow these
instructions strictly.
CAUTION:
The external protective earthing conductor is connected to the inverter protective earthing terminal
through the AC connector. When connecting, connect the AC connector first to ensure the inverter
earthing, then make the DC connections. When disconnecting, disconnect the AC by opening the
branch circuit breaker first but maintain the protective earthing conductor in the branch circuit breaker
connect to the inverter, then disconnect the DC inputs.

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◼In any circumstance, DO NOT connect DC input when the AC connector is unplugged.
◼Please install isolation switching devices on the AC side of the inverter.
Qualified Personnel:
A qualified person is one who has skills and knowledge related to the construction and operation of the
electrical equipment andhas received safety training on the hazards involved. It is authorized to energise,
ground, and tag equipment systems and circuits in accordance with established safety procedures. The
inverter and end-using system may only be commissioned by qualified personnel.
1.1. RADIO INTERFERENCE STATEMENT
CE EMC Compliance: The equipment can comply with CE EMC regulations, which are designed to
protect against harmful interference in a residential installation. The equipment can give out radio
frequency energy and this might cause harmful interference to radio communications if the instructions
presented below are not followed when installing the equipment. If this equipment 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 modifications not expressly approved by the party responsible for compliance may void the
user's authority to operate the equipment.
1.2. SYMBOLS
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
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

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2. MICROINVERTER SYSTEM INTRODUCTION
The Microinverter is used in utility-interactive grid-tied applications and it is comprised of two key
elements: the Microinverter and the router.
Figure 1 - 300G3/500G3/600G3/800G3/1000G3 models.

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
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


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Figure 2 - 1300G3/1600G3/1800G3/2000G3.
This integrated system improves safety, maximizes solar energy harvest, increases system reliability,
and simplifies solar system design, installation, maintenance, and management.
2.1. MICROINVERTERS MAXIMIZE PV ENERGY PRODUCTION
Each PV module has individual Maximum Peak Power Tracking (MPPT) controls, which ensures 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 affected by shade, dust, orientation, or any situation in
which one module underperforms compared with the other units, the Microinverter ensures peak
performance from the array by maximising 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. Microinverters are designed to operate at full power at ambient outdoor temperatures of up to
149℉(65℃). The inverter housing is designed for outdoor installation and complies with the IP65
environmental enclosure rating
NOTE:
If the wireless signal in the area where the Microinverter is weak, it is necessary to add a WIFI signal
booster at a suitable place between the router and the Microinverter.

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2.3. INSTALLATION - SIMPLICITY
You can install individual PV modules in any combination of Module quantity, orientation, different type,
and power rate. The Ground wire (PE) of the AC cable is connected to the chassis inside of the
Microinverter, potentially eliminating the installation of grounding wire (check local regulation).
Data collection adopts internal WIFI. A wireless router is needed near the Microinverter. When the
installation of the Microinverter is complete, configure a wireless router with internal WIFI (refer to the
WIFI user manual). The data will be uploaded automatically. Users can monitor and manage the
Microinverter through the corresponding website or APP.
3. MICROINVERTER INTRODUCTION
Microinverters connect with the single-phase grid, and we can also use multiple Microinverters in the
form of a single-phase grid to achieve a three-phase grid.
For more information, please see the Technical Data page (P17~20) of this manual.
Model Number
AC Grid
Max. # Per Branch
SUN300G3-EU-230
50/60Hz, 230 V
17 for 45A breaker
SUN500G3-EU-230
50/60Hz, 230 V
10 for 45A breaker
SUN600G3-EU-230
50/60Hz, 230 V
8 for 45A breaker
SUN800G3-EU-230
50/60Hz, 230 V
6 for 45A breaker
SUN1000G3-EU-230
50/60Hz, 230 V
5 for 45A breaker
SUN1300G3-EU-230
50/60Hz, 230 V
4 for 45A breaker
SUN1600G3-EU-230
50/60Hz, 230 V
4 for 45A breaker
SUN1800G3-EU-230
50/60Hz, 230 V
3 for 45A breaker
SUN2000G3-EU-230
50/60Hz, 230 V
3 for 45A breaker
4. MICROINVERTER SYSTEM INSTALLATION
A PV system using Microinverters is simpleto install. Each Microinverter easily mounts onthe PV racking,
directly beneath the PV module(s). Low voltage DC wires connect from the PV module directly to the
Microinverter, eliminating high DC voltage risk. Installation MUST comply with local regulations and
technical rules.
Special Statement! An AC Ground-Fault Circuit Interrupter (GFCI) should not be used to protect the
dedicated circuit to the Microinverter even though it is an outside circuit. None of the small GFCI devices
(5~30mA) are designed for back feeding and will be damaged if back feeding occurs. In a similar manner,
AC Arc-Fault Circuit Interrupter (AFCI) have not been evaluated for back feeding and may be damaged
if back feed occurs with the output of a PV inverter.

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4.1. ADDITIONAL INSTALLATION COMPONENTS
◼AC Male and Female Interconnection Connectors (sold separately)
◼Sealing end caps (sold separately)
4.2. REQUIRED PARTS AND TOOLS (USER SUPPLIED)
◼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
5. INSTALLATION PROCEDURES
Step 1 –Install the AC branch circuit junction box
Figure 3 - Installing the AC branch circuit junction box.
WARNING:
◼Perform all electrical installations in accordance with local electrical codes.
◼Be aware that only qualified professionals should install and/or replace Microinverters.
◼Before installing or using a Microinverter, please read all instructions and warnings in the technical
documents, as well as on the Microinverter system itself and the PV array.
◼Be aware that the 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.
NOTE:
Strongly recommend installing Surge Protection Devices in the dedicated meter box.

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◼Install an appropriate junction box at a suitable location on the PV racking system (typically at the end
of a branch of modules).
◼Connect the open wire end of the AC cable into the junction box using an appropriate gland or strain
relief fitting.
◼Wire the conductors of the AC(230/400Vac): L - red; N - black; PE - yellow-green.
◼Connect the AC branch circuit junction box to the point of utility Interconnection.
Step 2 –Attach the Microinverters to the racking or the PV module frame
a) Mark the location of the Microinverter on the rack, with respect to the PV module junction box or any
other obstructions.
b) Mount one Microinverter at each of these locations using hardware recommended by your module
racking vendor.
Figure 4 - 300G3/500G3 (1MPPT) and 600G3/800G3/1000G3 (2MPPT) mounting.
Figure 5 - 1300G3/1600G3/2000G3 (4MPPT) mounting.
WARNING:
Wiring colour codes can be different according to local regulations. Check all the wires of the
installation before connecting to the AC cable to be sure they match. Wrong cabling can damage the
microinverters irreparably. The warranty does not cover such an issue.