125KW Solis Solar Inverter Three phase high voltage grid tied solar inverters for solar panel system
125KW Solis Solar Inverter Three phase high voltage grid tied solar inverters for solar panel system
The Solis S5-GC(75-125)K-US series is a high efficiency 3 phase grid tied solar inverter for US C&I PV projects. It offers 75/80/90/100/125kW power versions, supporting 480V 3-phase grid connection and max 1000V DC input.
With peak efficiency up to 98.8%, multi-MPPT, high string current and DC/AC ratio over 1.5, it enables flexible PV layout and higher power generation. It features intelligent string monitoring & I-V scan for easy O&M, built-in AFCI, anti-islanding, surge protection, ground fault monitoring and night PID recovery.
Equipped with NEMA 4X housing, C5 anti-corrosion and smart redundant cooling, it fits harsh commercial solar sites. Remote firmware update and multiple communication interfaces simplify system management. Ideal for factories, warehouses, commercial buildings and large rooftop PV systems.
Model No :
S5-GC(75-125)K-USRated Power :
75 kW/80 kW/90 kW/100 kW/125 kWDimension :
1065*567*344.5 mmSolis S5-GC(75-125)K-US Three Phase Commercial Grid-Tied Solar Inverter

The Solis S5-GC(75-125)K-US series is a high efficiency three phase grid-tied solar inverter designed for commercial and industrial PV applications in the US market. Available in 75kW, 80kW, 90kW, 100kW and 125kW output options, this series supports 480V three phase grid connection and up to 1000V DC input voltage.
With up to 98.8% maximum efficiency, multiple MPPT designs, high string current capability and a DC/AC ratio above 1.5, the inverter helps support flexible PV array design and high energy yield. Intelligent string monitoring and I-V curve scanning make system operation and maintenance more convenient.
The inverter integrates AFCI protection, anti-islanding protection, surge protection, ground fault monitoring and nighttime PID recovery. Featuring a NEMA 4X enclosure, C5 anti-corrosion capability and intelligent redundant cooling, it is suitable for demanding commercial solar installations. Remote firmware upgrade and multiple communication options further support efficient system management.
This commercial solar inverter is suitable for factories, warehouses, commercial buildings, industrial facilities and large rooftop solar power projects.
Product Features
High Efficiency Conversion:Up to 98.8% maximum efficiency and up to 98.3% CEC efficiency help improve solar energy conversion performance for commercial and industrial PV systems.
Multiple MPPT Design:Available with 8, 9 or 10 MPPTs depending on the model, supporting up to 16, 18 or 20 input strings for flexible solar array configuration.
High PV Input Capability:Supports up to 1000V maximum DC input voltage and up to 16A string current, making it suitable for higher capacity solar modules.
Excellent DC/AC Ratio: Supports a DC/AC ratio above 1.5, providing greater flexibility when designing larger PV arrays.
Intelligent String Monitoring:Integrated string monitoring and smart I-V curve scanning help identify PV string performance and support efficient operation and maintenance.
Enhanced System Safety:Features integrated AFCI protection, DC reverse-polarity protection, DC Type II and AC Type II surge protection, anti-islanding protection and ground fault monitoring.
Nighttime PID Recovery:The integrated PID recovery function helps support PV module performance maintenance during system operation.
Rapid Shutdown Support:Supports SunSpec PLC signal for rapid shutdown and can be configured with APS, Tigo or NEP MLRSD transmitter options according to ordering requirements.
Durable Outdoor Installation:NEMA 4X protection, C5 anti-corrosion level and intelligent redundant cooling support installation in demanding commercial and industrial environments.
Smart Monitoring and Communication:Supports RS485 and Ethernet communication, with optional Wi-Fi and cellular communication. Remote firmware upgrade is also supported when using Solis monitoring.
Basic Data
| Product Series | Solis S5-GC(75-125)K-US |
| Product Type | Three Phase Grid-Tied Solar Inverter |
| Available Models | S5-GC75K-US, S5-GC80K-US, S5-GC90K-US, S5-GC100K-US, S5-GC125K-US |
| Rated Output Power | 75kW / 80kW / 90kW / 100kW / 125kW |
| Grid Connection | 3 Phase / PE |
| Rated Grid Voltage | 480V |
| Rated Grid Frequency | 60Hz |
| Maximum Input Voltage | 1000V |
| MPPT Voltage Range | 180V to 1000V |
| Start-Up Voltage | 195V |
| Number of MPPTs | 8 / 9 / 10 depending on model |
| Maximum Input Strings | 16 / 18 / 20 depending on model |
| Maximum String Current | Up to 16A |
| Maximum Efficiency | Up to 98.8% |
| CEC Efficiency | Up to 98.3% |
| Maximum DC/AC Ratio | Above 1.5 |
| Power Factor | >0.99, adjustable from 0.8 leading to 0.8 lagging |
| THDi | <3% |
| DC Connection | MC4 Connector |
| AC Connection | OT Terminal, max. 350 MCM |
| Display | LCD |
| Communication | RS485, Ethernet, Optional Wi-Fi, Cellular |
| Cooling | Intelligent Redundant Cooling |
| Enclosure Protection | NEMA 4X |
| Operating Temperature | -30°C to 60°C |
| Relative Humidity | 0 to 100% |
| Maximum Operating Altitude | 4000m |
| Topology | Transformerless |
| Night Self Consumption | <2W |
| Dimensions | 1065 × 567 × 344.5mm |
| Weight | 85kg for 75K to 100K models, 98.7kg for 125K model |
FAQ
Q1: What is the difference between the 75kW, 80kW, 90kW, 100kW and 125kW models?
A1: The main differences are rated output power, MPPT quantity, maximum input strings, input current configuration and maximum AC output current. Buyers can select the appropriate model according to the size and design requirements of their commercial or industrial solar project.
Q2: What type of solar system is this inverter designed for?
A2: This is a three phase grid-tied solar inverter designed for commercial and industrial PV applications. It is suitable for factories, warehouses, commercial buildings, industrial facilities and other large solar power projects requiring a 480V three phase grid connection.
Q3: What is the maximum DC input voltage?
A3: The maximum DC input voltage is 1000V, with an MPPT operating voltage range of 180V to 1000V and a start-up voltage of 195V.
Q4: How many MPPTs does this inverter have?
A4: Depending on the model, the inverter is available with 8, 9 or 10 MPPTs. It supports up to 16, 18 or 20 PV input strings, providing flexibility for different array configurations.
Q5: What is the maximum efficiency?
A5: The maximum efficiency reaches up to 98.8%, while the CEC efficiency reaches up to 98.3%, depending on the model.
Q6: Can this inverter support high power solar modules?
A6: Yes. The series supports string current up to 16A and is designed to support higher capacity solar modules. Buyers should confirm the complete PV array electrical design based on the selected inverter model and module parameters.
Q7: What safety protections are included?
A7: The inverter includes DC reverse-polarity protection, DC Type II and AC Type II surge protection, ground fault monitoring, anti-islanding protection, integrated AFCI and integrated PID recovery.
Q8: Does it support rapid shutdown applications?
A8: Yes. The inverter supports SunSpec PLC signal for rapid shutdown. APS, Tigo and NEP MLRSD transmitter options are also listed for applicable configurations.
Q9: Can the inverter be installed outdoors?
A9: Yes. It features a NEMA 4X enclosure, C5 anti-corrosion capability and an operating temperature range of -30°C to 60°C, supporting installation in demanding environments within the specified operating conditions.
Q10: What communication methods are available?
A10: Standard communication includes RS485 and Ethernet. Wi-Fi and cellular communication are optional. The inverter also supports remote firmware upgrades when used with Solis monitoring.
Q11: What grid voltage does the US version support?
A11: The rated grid voltage is 480V with a three phase and protective earth connection, and the rated grid frequency is 60Hz.
Q12: Which model should I choose for my project?
A12: The selection should be based on PV array capacity, available grid connection, string design, MPPT requirements and project output requirements. The 75kW to 125kW range provides multiple options for different commercial and industrial solar installations.
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