SOLIS S6 Series User Manual
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SOLIS S6 Series User Manual

SOLIS S6 Series User Manual

Grid tie inverter
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User Manual
for S6 Series Grid Tie Inverter
Applicable models
S6-GU250K-EHV-US-M12
S6-GU300K-EHV-US-M12
S6-GU350K-EHV-US-M12
S6-GU350K-EHV-US-M16
PE-MN-0001-R00 Date: 02, 2025

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Summary of Contents for SOLIS S6 Series

  • Page 1 User Manual for S6 Series Grid Tie Inverter Applicable models S6-GU250K-EHV-US-M12 S6-GU300K-EHV-US-M12 S6-GU350K-EHV-US-M12 S6-GU350K-EHV-US-M16 PE-MN-0001-R00 Date: 02, 2025...

  • Page 2: Important Notes

    ● Airborne noise produced depending on the environment. ● Potential flammability hazards. ● Solis will not be held liable for defects or malfunctions arising from: ● Improper use of the equipment. ● Deterioration resulting from transportation or particular environmental conditions.
  • Page 3 Table of Contents Introduction Safety & Warning Installation Communication & Monitoring Commissioning Settings Start and Shutdown Normal Operation Maintenance 10 Troubleshooting 11 Specifications 12 Appendix...

  • Page 4: Table Of Contents

    Table of Contents 1. Introduction ………………………………………………………………………………………………………………………………………… 1.1 Product Description ……………………………………………………………………………………………………… 1.2 Front Panel LED ……………………………………………………………………………………………… 1.3 LED Status Indicator Lights ……………………………………………………………………………………………… 1.4 Unpacking …………………………………………………………………………………………………………… 1.5 Inverter Circuit Diagram ……………………………………………………………………………………………… 1.6 Tools Required for Installation ……………………………………………………………………………………………… 1.7 Storage ……………………………………………………………………………………………………………… 1.8 Notice for Disposal ………………………………………………………………………………………………………...
  • Page 5 Table of Contents 6.1.4 Frequency Derating (Droop) Setting ……………………………………………… 6.2 Inverter Setting ……………………………………………………………………………………………………………… 6.2.1 Inverter Function Setting …… … …………………… … ………………………………… … … 6.2.2 Inverter Parameter Setting …… … …………………… … ………………………………… … … 6.2.3 Inverter Power Setting …… …...

  • Page 6: Introduction

    User Manual 1.1 Product Description Solis Three phase Transformerless Grid Support Utility Interactive PV Inverters convert DC power from the photovoltaic (PV) array into alternating current (AC) power that can satisfy local loads as well as feed into the power distribution grid.

  • Page 7: Front Panel Led

    1. Introduction User Manual 1.2 Front Panel LED Figure 1.3 Front Panel Display 1.3 LED Status Indicator Lights There are four LED status indicator lights on the front panel of the inverter. POWER LED (red) indicates the power status of the inverter. OPERATION LED (green) indicates the operation status.

  • Page 8: Unpacking

    1. Introduction User Manual 1.4 Unpacking The inverter ships with all accessories in one carton. When unpacking, please verify all the parts listed below are included: Description Part # Quantity Remarks Inverter Mounting Bracket Fastening screw Hexagon bolt M6*12 Fastening screw, hex nut and flat gasket Hexagon bolt M10*40 Staubli Electrical Connectors AG DC connector...

  • Page 9: Inverter Circuit Diagram

    1. Introduction User Manual 1.5 Inverter Circuit Diagram Figure 1.5 Inverter Circuit Diagram 1.6 Tools Required for Installation Wire Strippers Wire Strippers Torqx T20 Screwdriver Technician Screwdriver 12AWG to 6AWG 20AWG to 10AWG LUG Crimping Tool Channel Locks Multimeter (AC/DC amps) Drill and Impact Driver Smart Phone Torque Screwdriver...

  • Page 10: Storage

    1. Introduction User Manual 1.7 Storage If the inverter is not installed immediately, storage instructions and environmental conditions are below: ● Use the original box to repackage the inverter, seal with adhesive tape with the desiccant inside the box. ● Store the inverter in a clean, dry environment, free of dust and debris. The recommended storage temperature range is 40~176°F, with a humidity level of 0 to 95% (non-condensing).

  • Page 11: Safety & Warning

    2. Safety & Warning User Manual 2.1 Safety symbols Safety symbols used in this manual, which highlight potential safety risks and important safety information, are listed below: WARNING Symbol indicates important safety instructions, which if not correctly followed, could result in serious injury or death. NOTE Symbol indicates important safety instructions, which if not correctly followed, could result in damage to or the destruction of the inverter.

  • Page 12: Notice For Use

    Switch is turned on. To stop the inverter, see power down instructions in Section 7.2. 2.4 Protection Circuitry and Controls To meet relevant codes and standards, the Solis U.S. and Canada three phase inverter line is equipped with protective circuitry and controls. These include Arc Fault Circuit Interrupter (AFCI) and Anti-Islanding Protection.

  • Page 13: Installation

    3. Installation User Manual NOTE For additional installation details, watch the installation video in the link below https://www.youtube.com/watch?v=GOULU5jD_-4 3.1 Environmental considerations 3.1.1 Select a location for the inverter When selecting a location for the inverter, consider the following: WARNING: Risk of fire Despite careful construction, electrical devices can cause fires.

  • Page 14: Other Environmental Considerations

    3.1.2.3 Avoiding direct sunlight Installation of the inverter in a location exposed to direct sunlight should to be avoided. Sun Shade covers are available from Solis for various inverter models. Direct exposure to sunlight could cause: ● Power output limitation (with a resulting decreased energy production by the system).
  • Page 15 3. Installation User Manual ≥24in ≥12in ≥20in ≥24in Figure 3.2 Clearance distances requirement for the inverter ≥12in ≥20in ≥20in ≥40in ≥12in Figure 3.3 Distances required between inverters when multiple inverters are installed...

  • Page 16: Product Handling

    3. Installation User Manual 3.1.2.4 Air circulation Avoid installing the inverter in confined spaces where airflow is restricted. To prevent overheating, always ensure that the air flow around the inverter is not blocked. 3.1.2.5 Flammable substances Do not install near flammable substances. Maintain a minimum distance of three (3) meters (10 feet) from such substances.
  • Page 17 3. Installation User Manual Figure 3.5 Inverter handles WARNING Due to the weight of the inverter, contusions or bone fractures could occur when incorrectly lifting and mounting the inverter. When mounting the inverter, take the weight of the inverter into consideration. Use a suitable lifting technique when mounting.

  • Page 18: Mounting The Inverter

    3. Installation User Manual 3.3 Mounting the Inverter The inverter can be mounted to the wall or metal array racking. The mounting holes should be consistent with the size of the bracket or the dimensions shown in Figure 3.7. Figure 3.7 Inverter wall mounting 3.3.1 Wall mounting Inverter shall be mounted vertically.

  • Page 19: Electrical Connections

    3. Installation User Manual 5. Use screws in the packaging to fix the inverter to the mounting bracket. Torque:1.5-2.2 ft.lbs Figure 3.9 Fix the inverter 3.4 Electrical Connections Inverter design uses PV style quick-connect terminal. The top cover does not need be opened during DC electrical connection.

  • Page 20: Grounding

    3. Installation User Manual 3.4.1 Grounding To effectively protect the inverter, two grounding methods must be performed. 1. Connect the AC grounding cable (refer to section 3.4.3) 2. Connect the external grounding terminal. To connect the grounding terminal on the heat sink, please follow the steps below: 1.
  • Page 21 3. Installation User Manual NOTE B (insulation stripping length) is 2mm~3mm longer than A (OT cable terminal crimping area) . 4. Insert the stripped wire into the OT terminal crimping area and use the hydraulic clamp to crimp the terminal to the wire. NOTE After crimping the terminal to the wire, inspect the connection to ensure the terminal is solidly crimped to the wire.

  • Page 22: Connect Pv Side Of Inverter

    3. Installation User Manual 3.4.2 Connect PV side of inverter WARNING Before connecting the inverter, make sure the PV array open circuit voltage is within the limit of the inverter. Otherwise, the inverter could be damaged. WARNING DO NOT connect the PV array positive or PV array negative cable to ground. This can cause serious damage to the inverter! WARNING MAKE SURE the polarity of the PV array output conductors matches...
  • Page 23 3. Installation User Manual 5. Measure the DC voltage of each PV string with multi-meter, confirm the polarity of PV strings are correct (see figure 3.16), and ensure each string voltage is in range of inverter operation. Connect DC connector with inverter until hearing a slight clicking sound indicating successful connection.

  • Page 24: Connect Grid Side Of Inverter

    3. Installation User Manual 3.4.2.1 DC connection high voltage danger notice CAUTION Risk of electrical shock. Do not touch an energized DC conductor. There are high voltages present when PV modules are exposed to light causing a risk of death due to an electric shock from touching a DC conductor! Only connect the DC cables from the PV module to the inverter as described in this manual.
  • Page 25 3. Installation User Manual 3.4.3.1 Aluminum Cable Requirements When Aluminum cable is selected, use copper to aluminum adapter terminal to avoid direct contact between the copper bar and the aluminum cable. When using aluminum/copper wire rated lug, no additional adapters are required. Compression Washer Steel or Copper Stud Tin Plated Flat Washer...

  • Page 26: Connecting The Inverter To The Utility Grid

    3. Installation User Manual 3.4.3.2 Connecting the inverter to the utility grid All electrical installations must be carried out in accordance with the local standards and the National Electrical Code® ANSI/NFPA 70 or the Canadian Electrical Code® CSA C22.1. The AC and DC electric circuits are isolated from the enclosure. If required by section 250 of the National Electrical Code®, ANSI/NFPA 70, the installer is responsible for grounding the system.
  • Page 27 3. Installation User Manual Cable specification Ground wire AC Phase L1-L3 wire 4/0- 1000kcmil (120~500) Range Conductor gage 1/0-250 (70~150) AWG/ (mm ) Recommended (CU) 3/0 (95) 400kcmil (240) Range Same Conduit 3” (92) Conduit diameter Inch/ (mm) 3” (92) Same Conduit Recommended NOTE...
  • Page 28 3. Installation User Manual Compression Washer Steel or Copper Stud Tin Plated Flat Washer Connector for Copper/Aluminum Lug Tin Plated aluminum/copper Copper/Aluminum Wire code conductors Figure 3.21 Connecting to AC terminals 3. LOTO the AC breaker disconnect to ensure it does not close unexpectedly. 4.

  • Page 29: Communication & Monitoring

    4. Communication & Monitoring User Manual There are 4 communication terminals on the inverter. GPRS WIFI is a 4-pin connector reserved for WiFi/Cellular datalogger. 2 x RS-485 ports are for RS-485 communication between inverters. DRM port is for DRM connection. 4.1 RS-485 communication connection Monitoring system for multiple inverters Multiple inverters can be monitored through RS-485 daisy chain configuration.

  • Page 30: Plc (Power Line Communication) Connection

    4. Communication & Monitoring User Manual Figure 4.3 RS-485 Cable assembly Figure 4.4 RS-485 Inverter cable connection 4.2 PLC ( Power Line Communication) connection PV Strings Inverter Datalogger PLC CCO PV Strings Inverter Transformer Grid PV Strings Inverter RS-485/ Ethernet TCP/IP PV Strings Inverter Figure 4.5 Multiple inverter monitoring system...

  • Page 31: Commissioning

    5.3 Selecting the appropriate grid standard 5.3.1 Verifying grid standard for country of installation Solis inverters are used worldwide and feature preset standards for operating on any grid. Although the grid standard is set at the factory, it is essential the grid standard be verified for the country of installation before commissioning.

  • Page 32: Preliminary Checks

    Input voltages higher than the maximum value accepted by the inverter (see “Specifications” in section 11) may damage the inverter. Although Solis inverters feature reverse polarity protection, prolonged connection in reverse polarity may damage these protection circuits and/or the inverter.

  • Page 33: Ac Configuration

    User Manual 5.4.3.2.1 Detection of leakage to ground Solis inverters are transformer-less and do not have an array connection to ground. Any measurement of a fixed voltage between ground and either the positive or negative string wiring indicates a leakage (ground fault) to ground and must be corrected prior to energizing the inverter or damage to the inverter may result.

  • Page 34: Settings

    6. Settings User Manual 6.1 Connection to SolisCloud 6.1.1 Connect inverter with SolisCloud application Turn your phone Bluetooth ON and then open the SolisCloud app. Tap Service, then tap Local Operation, and then tap Connect with Bluetooth. (or Installer) The name of the inverter Bluetooth network will display as “INV_” and then the inverter serial number.

  • Page 35: Select Inverter Grid Code

    6. Settings User Manual 6.1.2 Select Inverter Grid Code Tap on Setting in the bottom right corner, then tap Grid Parameter Setting . Tap Grid Code Setting Check . For inverters installed in US and Canada select IEEE1547-2018 grid code standard and tap SAVE. Grid Code Protection settings can be changed within the Grid Code Setting menu.

  • Page 36: Inverter Work Mode Setting

    6. Settings User Manual 6.1.3 Inverter Work Mode Setting Tap on Inverter Work Mode Setting. Select the desired work mode, Active Power Mode or Reactive Power Mode or both. To activate the function Active Power Mode the Volt-Watt button must be activated (orange). Voltage and power setting can be adjusted in the same menu.

  • Page 37: Frequency Derating (Droop) Setting

    6. Settings User Manual 6.1.4 Frequency Derating (Droop) Setting Tap on Frequency Derating Setting. Select Frequency Derating Mode standard. Select the 13H-IEEE1547-18 standard from the menu and tap on SAVE. Frequency Derating (Droop) Settings can be changed in the same menu. 6.2 Inverter Setting 6.2.1 Inverter Function Setting Tap on Inverter Setting .

  • Page 38: Inverter Parameter Setting

    6. Settings User Manual 6.2.2 Inverter Parameter Settin Select Inverter Parameter Setting .Several inverter function such as date and time, RS-485 address and others can be set under this settings. Follow the screen samples below for all available inverter settings under this menu. 6.2.3 Inverter Power Setting Select Inverter Power Setting .Inverter power Derating, Night SVG , Power slope control PF Curve and other power function can be set in this menu.

  • Page 39: Inverter Special Function Setting

    6. Settings User Manual 6.2.4 Inverter Special Function Setting Select Inverter Special Function Setting .Several inverter special function such as Factory Reset, Grid Filter No. AFCI Test and others can be set under this settings. Follow the screen samples below for all available inverter settings under this menu.

  • Page 40: Start And Shutdown

    The red DC POWER LED will be continuously lit. 4. Solis Utility inverters are powered from both the DC and AC sides. When the inverter detects DC voltage that is within start-up and operating ranges, the inverter will turn on.

  • Page 41: Normal Operation

    8. Normal operation User Manual 8.1 Inverter APP Home Screen Inverter generation yield, PV voltage and current and Output voltage and current can be monitored on the Home screen. 8.2 Inverter Information Screen Inverter general information such as Serial Number, Output Power, Rated Power, Firmware Version, Grid Code and other critical information is located under the Info tap.

  • Page 42: Inverter Alarm

    8. Normal operation User Manual 8.3 Inverter Alarm Inverter alarm status and log can be viewed under Alarm tab.

  • Page 43: Maintenance

    9. Maintenance User Manual NOTE If you need to maintain the inverter at night, please turn off the AC switch first, then turn off the DC switch, and wait 20 minutes before you do other operations. 9.1 Fan Maintenance If the fan doesn’t work properly, the inverter will not be cooled effectively and it may affect the operation of the inverter.

  • Page 44: Troubleshooting

    (5) minutes before restarting it (refer to Section 7.1). If the failure persists, please first contact your local distributor and then Solis Support Service. If you need to contact Solis Support Service, please call +1(866) 438-8408 or emails us to usservice@solisinverters.com Please have the following information available when contacting technical support: 1.
  • Page 45 10. Troubleshooting User Manual Alarms Cause Solution Test – DC switch OFF • Check PV connections. • Input voltage low/missing • Check polarity. No Information • Polarity reversed • Check voltage >200V. (Blank Screen) • Main board damaged Test – DC Switch ON. •...
  • Page 46 10. Troubleshooting User Manual Alarms Cause Solution Test – DC switch OFF • Check frequency at the inverter test points. • If Frequency measures high, adjust upper limit with permission from utility. OV-G-F: Over • Inverter detects grid • Check LCD reading, may be a bad Grid Frequency Frequency as too high measurement circuit.
  • Page 47 10. Troubleshooting User Manual Alarms Cause Solution Reset Inverter • DC switch OFF. INI-FAULT: • Master and Slave DSP • Wait until all lights/LCD turn off. Initialization have different values • DC switch ON. Protection • Replace inverter. Inspect installation OV-TEM: •...
  • Page 48 • • • • RSD fault • Inverter logic • Check Inverter DSP FW version by holding fault the “Enter” key for 10 seconds. If DSP version reads 00 contact Solis service or replace the inverter. Inspect installation • Grid current tracking • IGFOL-F: Grid •...
  • Page 49 10. Troubleshooting User Manual Alarms Cause Solution Inspect installation • Check PV string wire insulation and connect ILeak-PRO: • Grid side current leakage one string at the time to the DC input. Leakage protection • Check AC wire insulation for any damage. current •...
  • Page 50 10. Troubleshooting User Manual Alarms Cause Solution IG-AD: Inspect installation • Grid current sampling by Abnormal grid • Restart the inverter. the inverter is abnormal current sampling • Replace Inverter. Inspect installation DSP-SelfCheck: • DSP Failed to enable • Restart the inverter. DSP self-check self-detection •...

  • Page 51: Specifications

    11. Specifications User Manual Model S6-350K-EHV-US-M12 Max. DC input voltage (Volts) 1500 Rated DC voltage (Volts) 1080 Start-up voltage (Volts) Operating DC Input Voltage Range (Volts) 480-1500 Full load MPPT voltage range (Volts) 860-1300 Max. input current (Amps) 12x40 Max short circuit input current (Amps) 12x70 MPPT number/Max input strings number 12/24...
  • Page 52 11. Specifications User Manual Model S6-350K-EHV-US-M16 Max. DC input voltage (Volts) 1500 Rated DC voltage (Volts) 1080 Start-up voltage (Volts) Operating DC Input Voltage Range (Volts) 480-1500 Full load MPPT voltage range (Volts) 860-1300 Max. input current (Amps) 16x30 Max short circuit input current (Amps) 16x60 MPPT number/Max input strings number 16/32...
  • Page 53 11. Specifications User Manual Model S6-300K-EHV-US-M12 Max. DC input voltage (Volts) 1500 Rated DC voltage (Volts) 1080 Start-up voltage (Volts) Operating DC Input Voltage Range (Volts) 480-1500 Full load MPPT voltage range (Volts) 860-1300 Max. input current (Amps) 12x40 Max short circuit input current (Amps) 12x70 MPPT number/Max input strings number 12/24...
  • Page 54 11. Specifications User Manual Model S6-250K-EHV-US-M12 Max. DC input voltage (Volts) 1500 Rated DC voltage (Volts) 1080 Start-up voltage (Volts) Operating DC Input Voltage Range (Volts) 480-1500 Full load MPPT voltage range (Volts) 860-1300 Max. input current (Amps) 12x40 Max short circuit input current (Amps) 12x70 MPPT number/Max input strings number 12/24...

  • Page 55: Appendices

    12. Appendices User Manual Torque Parts Cover screws 1.5-1.7 ft.lbs Ground screws (Cover) 4.4-5.9 ft.lbs Ground screws (Internal) 7.4-8.9 ft.lbs AC terminals 25-33 ft.lbs 12.1 Temperature Derating Comments: A thermal sensor inside the inverter is calibrated to determine ambient temperature. All inverters will begin a sloped derate at 30°C ending at 78% output power at 60°C.
  • Page 56 12. Appendices User Manual...

  • Page 57: Input Voltage Derating

    12. Appendices User Manual 12.2 Input Voltage Derating...

  • Page 58: Output Voltage Derating

    12. Appendices User Manual 12.3 Output Voltage Derating...
  • Page 59 12. Appendices User Manual...

  • Page 60: P-Q Capabilities

    12. Appendices User Manual 12.4 P-Q Capabilities at Nominal Output Power...
  • Page 61 12. Appendices User Manual...

  • Page 62: Default Grid Setting For Ieee1547-2018

    12. Appendices User Manual 12.5 Default Grid Setting for IEEE1547-2018 Adjustment Default Parameter Description (pu) Range (pu) Set grid over-voltage protection 01 value OV-G-V 01 1.10≤V≤1.21 1.10Vn OV-G-V-T 01 Grid over-voltage protection 01 trip time 0.1≤t≤13 S 13 S Set grid over-voltage protection 02 value OV-G-V 02 1.10≤V≤1.30 1.20Vn...
  • Page 63 12. Appendices User Manual 12.5 Default Grid Setting for IEEE1547-2018 Adjustment Default Parameter Description Range (pu) (pu) Set the time to ramp up to 90% of the new active 10 S 0≤t≤180 S Volt Watt P3Tau power target in response to the change in voltage Set the time to ramp up to 90% of the new reactive Volt Var Q3Tau 0≤t≤180 S...
  • Page 64 12. Appendices User Manual 12.5 Default Grid Setting for 800VAC Adjustment Default Parameter Range V/pu/S/Hz V/pu/S/Hz OV-G-V 01 880V 1.10≤V≤1.21 880≤V≤968 1.10Vn OV-G-V-T 01 0.1≤t≤13 S 13 S OV-G-V 02 1.10≤V≤1.30 960V 880≤V≤1040 1.20Vn OV-G-V-T 02 0.16 S 0.1≤t≤5 S 0.05≤V≤0.90 UN-G-V 01 40≤V≤720...
  • Page 65 12. Appendices User Manual 12.5 Default Grid Setting for 600VAC Adjustment Default Parameter Range V/pu/S/Hz V/pu/S/Hz OV-G-V 01 660V 1.10≤V≤1.21 660≤V≤726 1.10Vn OV-G-V-T 01 0.1≤t≤13 S 13 S OV-G-V02 1.10≤V≤1.30 720V 660≤V≤780 1.20Vn OV-G-V-T 02 0.16 S 0.1≤t≤5 S 0.05≤V≤0.90 UN-G-V 01 30≤V540 0.88Vn...

  • Page 66: Default Grid Setting For Hvrt, Lvrt And Frt

    12. Appendices User Manual 12.5.1 Default Grid Setting for HVRT, LVRT and FRT...

  • Page 67: Default Grid Setting For Volt-Var

    12. Appendices User Manual 12.5.2 Default Grid Setting for VOLT-VAR 12.5.3 Default Grid Setting for VOLT-WATT...

  • Page 68: Default Grid Setting For Frequency Droop

    12. Appendices User Manual 12.5.4 Default Grid Setting for FREQUENCY DROOP...

  • Page 69: Product Certification Of Compliance

    12. Appendices User Manual 12.7 Product Certificate of Compliance...
  • Page 70 12. Appendices User Manual 12.7 Product Certificate of Compliance...
  • Page 71 12. Appendices User Manual 12.7 Product Certificate of Compliance...

  • Page 72: Mechanical Dimension Drawing

    12. Appendices User Manual 12.8 Mechanical Dimension Drawing...

  • Page 73: Medium Voltage Transformer Winding Configuration

    12. Appendices User Manual 12.9 Medium Voltage Transformer Winding Configuration Compatible Transformer Winding Configuration Dy(n) Inverter Model Y(n)d Y(n)y(n) S6-GU250K-EHV-US S6-GU300K-EHV-US S6-GU350K-EHV-US...
  • Page 74 Manufacturer: Ginlong Technologies Co.,Ltd., Ningbo, Zhejiang, P.R.China Toll-free: 866.438.8408 I Email: sales@ginlong.com I ussales@solisinverters.com usservice@solisinverters.com Web: www.ginlong.com I www.solisinverters.com/us Please adhere to the actual products in case of any discrepancies in this user manual. Please record the serial number of your inverter and quote this when you contact us.

This manual is also suitable for:

S6-gu250k-ehv-us-m12S6-gu300k-ehv-us-m12S6-gu350k-ehv-us-m12S6-gu350k-ehv-us-m16

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