THREE PHASE GRID-TIED
PV STRING INVERTER
100K/110K/125K
( UserManual )
REV.1-Preliminary
S.MG-OM:SG 100-125T
About This Manual
This manual describes the installation, electrical connection, commissioning and maintenance, APP operation of Three-phase Grid-tied PV String Inverter. Please first read the manual and related documents carefully before using the product and store it in a place where installation, operation and maintenance personnel can access it at any time. The illustration in this user manual is for reference only. This user manual is subject to change without prior notice. (pecific please in kind prevail.)
Target Group
Three phase hybrid inverters must be installed by professional electrical engineers who have obtained relevant qualitications.
Scope
This manual is applicable to following inverters:
- 100K/110K/125K
Conventions
The following safety instructions and general information are used within this user manual.
 DANGER | Indicates an imminently hazardous situation which, if not correctly followed, will result in serious injury or death. |
 WARNING | Indicates a potentially hazardous situation which, if not correctly fnlInvenri, will result in serious injury or death. |
| CAUTION | Indicates a potentially hazardous situation which, if not correctly followed, could result in moderate or minor injury. |
| NOTICE | Indicates a potentially hazardous situation which, if not correctly followed, could result in equipment failure to run, or property damage. |
 NOTE | Call attention to important information, best practices and tips: supplement additional safety instructions for your better use of the Three phase hybrid inverter to reduce the waste of you resource. |
Safety
Before using the inverter, please read all instructions and cautionary markings on the unit and manual. Put the instructions where you can take them easily. The Three-phase Grid-tied IV String Inverter of ours strictly conforms to related safety rules in design and test. Local safety regulation shall be followed during installation, operation and maintenance. Incorrect operation work may cause injury or death and damage to the inverter and other properties belonging to the operator or a third party.
1.1 Safety Instructions
 | Risk of electric shock The device contains high voltages, Eath alternating and direct, and high leakage currents may be generated during operation. To avoid risk of electric shock during maintenance or installation, make sure that all DC and AC connection terminals are disconnected. First connect the grounding wire to grounding and disconnect it for maintenance. Check proper phase and neutral connection. If the unit is used without following the specifications of the manufacture, the protection provided by the equipment may be impaired. Disconnect the inverter from the grid and fram the photovalraic generator hefare cleaning photovoltaic strings. An unexpected capacitive current from the surface of the strings may surprise operator and cause them to fall from the roof. |
 | Hanging the PV inverter The PVinverter must only be handled by qualified service personnel. When the photovoltaic generator is exposed to sufficient light intensity, it generates a DC voltage and, when connected to the device, it charges the bulk capacitor. After having discannected the PV inverter from the grid and the PV generator, an electric charge may remain in the bulk capacitor. Please wait at least 10 minutes after disconnecting from the grid before handing, |
| Exclusively for the grid The PV inverter is designed for the sole purpase of converting from PV strings and injecting it into the grid. This inverter is not designed to be powered by saurces of primary energy other than PV strings or to be connected to different loads other than the public grid. |
 | Hot surfaces Although it has been designsd in accordance with international safsty standards, the PV inverter may become hut during operation. |
1.2 Safety Precaution
- Installation,maintenance and connection of inverters must be performed by qualified personnel, in compliance with local electrical standards, wiring rules and requirements of local power authorities and/or companies(for example: AS 4777 and AS/NZS 3000 IN Australia).
- To avoid electric shock, DC input and AC output of the inverter must be terminated at least 5 minutes before performing any installation or maintenance.
- The temperature of some parts of the inverter may exceed 60°C during operation. Do not touch the inverter during operation to avoid being burnt and let it cool before touching it.
- Ensure children are kept away from inverters.
• Don’ t open the front cover of the inverter. A part from performing work at the wiring terminal (as instructed in this manual), touching or changing components without authorization may cause injury to people, damage to inverters and annulment of the warranty. - Static electricity may damage electronic components. Appropriate method must be adopted to prevent such damage to the inverter; otherwise the inverter may be damaged and the warranty annulled.
- Ensure the output voltage of the proposed PV array is lower than the maximum rated input voltage of the inverter; otherwise the inverter may be damaged and the warranty annulled.
- When exposed to sunlight, the PV array generates dangerous high DC voltage. Please operate according to our instructions, or it will result in danger to life.
- PV modules should have an IEC61730 class A rating.
- If the equipment is used in a manner not specified by the manufacturer, the protection provided by the equipment may be impaired.
- Completely isolate the inverter before maintaining. Completely isolate the inverter should: Switch off the PV switch, disconnect the PV terminal, disconnect the battery terminal, and disconnect the AC terminal.
- Don’ t insert or pull the AC and DC terminals when the inverter is running.
- In Australia, the inverter internal switching does not maintain the neutral integrity, neutral integrity must be addressed by external connection arrangements.
- In Australia the output of backup side in switchbox should be labeled main switch UPS supply, the output or nbrmai ioaa side ins witcnioox snow De tame° mains switcn inverter suppiy.
Product Introduction
2.1 Outline and Dimensions
2.2 Route connection for PV strings installation
Route connecting for the installation of PV strings per inverter model is shown in below table:
100k totally 16 routes; 110k/125k totally 18 routes.
| Model MPPT1 MPPT2 | MPPT3 | MPPT4 | MPPT5 MPPT6 | MPPT7 | MPPT8 MPPT9 | ||
| 100k 2routes 2routes | 2routes | 2routes | 2routes 2routes | 2routes | 2routes | ||
| 110k/125k 2routes 2routes | 2routes | 2routes | 2routes | 12routes | 2routes | 2routes | 2routes |
Unpack and Storage
3.1 Packing list
| Items | Deliverables |
| A | The inverter |
| B | Rear panel |
| C | File package |
| D | RS485 connector |
| E | DC terminal connector group |
| F | M8 screws |
| G H | M12 Bolt group (including screw, nut) *4 (reserved for tightening the support and rear panel) |
| Removal tool for DC connectors |
3.2 Selecting the Mounting Location
Installation Environment Requirements
a The PVinverter protection class is IPG6 and can he monnted indoors ar autdoors
b. The mounting location must be inaccessible to unrelated personnel since the bracket and heat sinks are extremely hot during operation.
c. Do not install the PV inverter in areas containing highly flammable materials or gases.
d. To ensure optimum operation and long operation life, the ambient temperature must be below 50°C.
e. The PV inverter must be mounted in a well-ventilated environment to ensure good heat dissipation.
f. To ensure long operation life, the storage of the inverter must not be exposed to direct sunlight, rain, or snow. It is recommended that the inverter be mounted in a sheltered place.
g. The carrier where the inverter is mounted must be fire-proof. Do not mount the inverter on flammable building materials.
h. Do not install the inverter in a rest area since it will cause noise during operation.
i. The installation height should be reasonable and make sure it is easy to operate and view the display.
J. Product label and warning symbols shall be clear to read after installation.
k. Please avoid direct sunlight, rain exposure, snow lay up.
Installation Space Requirements
Reserve enough clearance around the inverter to ensure sufficient space for installation and heat dissipation, as shown in below image.
Support-mounting Inverter
| DANGER | 1.The walls must be fire-proot and non-flammable materials, otherwise there is atire risk 2.Before drilling holes, check whether there arz electrical pipes or other pipes buried in the walls to avoid risks, |
Inverteris installed on the wall or support by means of mounting bracket. The following, steps are illustrated with only support-mounted installation. The load-bearing capacity of the wall must be greater than LOKN/mi, M12 x 60mm stainless steel pressure- burst expansion bolts are recommended in wall- mounted installation.
Installation Self-check
- Ensure that the inverter is well fixed.
- Ensure that the inverter is locked on the support with an anti-theft lock installed.
Electrical Connection
4.1 Safety Caution
DANGER Before performing any electrical connections, ensure that both DC and AC switches are OFF. Otherwise, fatal injury can occur due to the high voltage generated from AC and DC cables. CAUTION Grounding the PV strings needs below prerequisites.
Anisolation transformer must be installed on the AC side of each inverter. Ensure that the neutral wire of the isolation transformer must be disconnected from the PGND cable, One isolation transformer is with ane PV inverter: do not install a single isolation transformer for multiple inverters. Otherwise, circulating current generated by the inverters will lead to operation failure.
4.2 Electrical Connections
Connecting Extern PGND Cables
NOTE
S: cross-sectional area of AC cable
Su: cross-sectional area of PE cable
The S, value is valid only when the PE cable and the AC cable are of the same material
NOTICE
Connecting External Protection Ground (PNGD) Cables can not substitute the PE of connecting the AC power cables. Ensure that both connecting are grounding well. Otherwise, warranty will be void if damage is caused by electrical connection faults.
AC circuit breaker
Connect the inverter with the power grid through installing one AC circuit breaker whose rated current is no less than 250A. Residual current protection function of square matrixes internally installed in the inverter and you can set leakage current protection value no less than the corresponding value in below table, if local utility department require leakage current protection function for AC circuit breaker. That set can save the inverter from its performance failure
| Inverter Model | Residual current |
| 100k | ≥110mA |
| 210k | ≥ 1230mA |
| 125k | ≥ 1330mA |
Connecting AC Output Cables
AC Cable Requirements:
NOTICE For your operation and safety sake, please prepare multi-stranded wire, crimping terminals and a proper crimping tool before AC wiring.
Connecting the PV Strings
Stept Remove an appropriate length of the insulation layer from the positive and negative power cables using a wire stripper, as shown in below Figure:
Step 2 Insert the exposed areas of the positive and negative cables into the metal terminals of the positive and negative connectors respectively and crimp them using a them using a crimping tool. Then insert the crimped positive and negative cables into the corresponding corresponding positive and negative connectors.
Step3 Insert the positive and negative connectors into the PV+/PV-port until a “click” sound is heard.
WARNING
When taking out DC connectors, please ensure that PV Strings aredisconnected. Otherwise, a fire can occur.
4.3 Connecting RS485 Communication Cables
RS485 Terminal Installation
RS485 communication mode with multiple inverters
Connect the differential positive and negative signal wires of the first RS485 cable from the data logger to Ping and PinT of the 8-Pin terminal respectively. If there is more than one inverter, connect Pin6 and Pin5 to Ping and PinT of another inverter.
RS485 communication address setting.
- Download the APP in either of the following ways
• Scan the QR code on the inverter to download the APP
• Download the APP from the App Store or Google Play.
Note: APP should access some permissions such as inverter’ s location. You need to allow all permissions to be granted in all pop-up windows when installing the APP or in your own phone setting. - Power on the inverter.
- Connect the Inverter. Open the Bluetooth on your own phone, then open the APP.
Then follow the instructions below.
- Go to Console > Communication Setting > RS485 Setting > Modbus Page, check the Modbus address (the default value is 1), and click to modify the address as required if necessary.
WITI/ LAN MODULE INSTALLATION (OPTIONAL)
For details, please refer to the corresponding Module Installation Guide in the packing.The appearance of modules may be slightly different. The figure shown here is only for illustration.
System Operation
5.1 System Operation
Switch ON the AC circuit breaker and set the DC SWITCH of the inverter to ON, Observe .Slatuses of gr\’d—conne(.tmg light o.n th? \’r\vsrlerfor.a while. \.Fthe \igh.ts display that the inverter has entered grid-connecting, it means the inverter is operating well. Any query during operating the PV inverter, call your dealer.
To power OFF the Inverter, switch off the circuit breaker at AC terminal, and set the DC SWITCH to OFF.
WARNING After the inverter power is off, the remaining electricity and heat may still cause eletrical shock and burns. Please only begin servicing the inverter 10 minutes after the poweralff,
5.2 Startup/Shutdown the System
Inspection
| No. | Items |
| 1 | Theinverteris firmly installed |
| 2 | Thereisenough heat dissipation space, no external objects or parts left on the invertar |
| 3 | Itis convenient for operation and maintenance |
| 4 | The wiring of the system is correct and firm |
| 5 | Check whether the DC and AC connections are correct with amultimeter, and whether there is a shart circuit, break, or wrong conngction, |
| 6 | Check whether the waterproof nuts of eac part are tightened |
| 7 | The vacant port has been sealed |
| 8 | All safety labels and warning labels on the inverter are complete and without occlusion or alteration |
After the inverter is powered off, the remaining electricity and hest may still cause electrical shock and body burns. If need to disconnect the inverter cables, please wait at least 10 minutes before touching these parts of inverter.
LED Indicator
| LED Indicator | status | descriptions |
| PV Indicator | on | Voltage of PV strings meets the requirements for inverter grid-connecting to generate power. |
| blink | Voltage of PV strings can not meet the requirements for inverter grid-connecting to generate power. | |
| Grid Indicator | blink | Grid abnormal, can not meet the requirements for inverter grid-connecting to generate power. |
| off | The inverter is connecting to the grid. | |
| on | The inverter has connected to the grid. The inverter is generating power. | |
| COM Indicator | blink | Communications data transmission is underway. |
| off | No external communications are connected or no communications data transmission. | |
| Waring Indicator | on/blink | Refer LED status in warning table. |
| off | No warning. |
LCD Screen
LED status and Warning code
Maintenance
6.1 Maintenance
Check periodically heat sink and the inlet/outlet of external FAN, clean them, and ensure that they are free dust and blockage. If any abnormal with the FAN, please replace it.
Routine Maintenance
Inverter Uninstall
Inverter uninstall requires below procedure Step1 Disconnectall electric connections including these of communications cables, DC input cables, AC output cables and the PGND cables.
When uninstalling DC input connzctors, insert removal wrench into the bayonet shown in Figure, press the wrench down, and take out the connector.
Step2 Remove the inverter from its rear panel
Step3 Remove the rear panel
WARNWG Before uninstalling DC input connector, please ensure that the DC SWITCH is set to OFF lo avert equipment damage and/or personal injury.
The Inverter Troubleshonting
Ifany abnormal phenomena occur, refer to below table fortrouble shooting.
If failed, call your dealer for help.
| Issue | Solution |
| No display | 1.Check DC switch of inverter is on or off 2.If there is PV combiner box. check fuse, terminal,wires |
| No generation | 1.Check AC breaker is on or off 2.Wait stronger sunshine 3.Check the number of PV panel 4.To operate according to inverter’s manua |
| Inverter abnormal | 1.Disconnect both AC and DC breakers 2.Wait as less 10 minutes and switch on AC and DC breaker 3.Check whether inverter run normally or not |
| Power generation is less than expected | 1.Ensure that inverter is free from direct sun exposure and good ventilation 2.Check that inverter isn’t dust clogging, fans run normally 3.Ensure enough installation distance between inverters |
Technical Specification
| Model | SG-100KWT | SG-110KVVT | SG-125KVVT |
| Efficiency | |||
| Max.efficiency | 99.% | 99.% | 99.% |
| European Ettioency | 98% | 98.% | 96.% |
| Input(PV) | |||
| Max. Input Voltage | 1100V | ||
| Max. PV configuration | 150% | ||
| Rated Input Voltage | 620V | ||
| Max. Input Current | 3’40A+5*32A | 3.40A+6.32A | |
| Max.Short Circuit Current | 3’50A+5’45A | 3’50A+6*45A | |
| Start Input Voltage/ Min. Operating Voltage | 250V/200V | ||
| MPPT Operating Voltage Range | 200V-1000V | ||
| Max. Number of PV Strings | 16(82) | 18(92) | |
| No. of MPPTs Output (Grid) | 8 | ||
| Rated AC Active Power | 100,000W | 110,000W | 125,000W |
| Max. AC Apparent Power | 110,000VA | 121.000VA | 137.500VA |
| Max. AC Active Power (PF=1) | 110,000W | 121,000W | 137,500W |
| Max. AC Output Current | 3968.8A | 3’187A | 3’167.3A |
| Rated AC Voltage | 400V. 3W+N+PE | 480V. 3W+PE | |
| AC Voltage Range* | 277V-520V (Adjustable) | 300V-550V (Adjustable) | |
| Rated Grid Frequency | 50Hz / 60Hz | ||
| Grid Frequency Range- | 45Hz-55Hz/55Hz-65Hz (Adjustable) | ||
| THDI | <3% (Rated Power) | ||
| DC Current Injection | <0.5%ln | ||
| Power Factor | > 0.99 Rated power (Adjustable 0.8 LD – 0.8 LG) | ||
| Protection | |||
| DC switch | Support | ||
| Anti-islanding protection | Support | ||
| AC overcurrent protection | Support | ||
| AC short circuit protection | Support | ||
| DC reverse connection | Support | ||
| Surge Arrester | DC Type II/AC Type II | ||
| Insulation detection | Support | ||
| Leakage current protection | Support | ||
| AFC! | Optional | ||
| PID Recovery | Optional | ||
| PV String monitoring | Optional | ||
| Night load consumption monitoring | Optional | ||
| General | |||
| Topology | Transformerless | ||
| IP Rating | I P66 | ||
| Night Self Consumption | <10W | ||
| Cooling | Fan cooling | ||
| Operating Temperature Range | -25t-sot | ||
| Relative Humidity Range | 0-100% | ||
| Max. Operating Altitude | 4000m | ||
| Noise | <75dB | ||
| Dimensions (WFI’D) | 850mm’670mm •356mm | ||
| Weight | 85Kg | ||
| HMI & COM | |||
| Display | Wireless & APP+LED. LCD (Optional) | ||
| Communication | RS 485, Optional: WiFVGPRS/4G/LAN | ||
| Warranty | 5 Years | ||
Remarks:
- The range of output voltage and frequency may vary depending upon different grid codes
- Specifications are subject o change without advance notice.
Technical Assistance
SolarMG offers a technical assistance and consultancy service
To take advantage of this service, the following number is active: 055911077 Or by writing to the email: support@solarmg.it
Documents / Resources
 | SOLARMG 100k 125k Three Phase Grid Tied PV String Inverter [pdf] User Manual 100k 125k Three Phase Grid Tied PV String Inverter, 100k 125k, Three Phase Grid Tied PV String Inverter, Tied PV String Inverter, String Inverter, Inverter |
