Solis 125kW Three Phase Grid-Tied String Inverter w/ Tigo MLRSD Transmitter S5-GC125K-US-RSS

The Solis S5-GC125K-US-RSS is a 125kW three-phase grid-tied string inverter designed for high-capacity photovoltaic systems operating on 480V three-phase utility service. It combines high power density, 10 independent MPPTs, advanced string monitoring, integrated safety functions, and robust outdoor construction in a transformerless inverter platform.

The 125kW model supports up to 1000VDC maximum input voltage, a wide 180–1000V MPPT operating range, and 10 MPPTs with up to 20 input strings. Each MPPT supports up to 32A maximum input current, helping accommodate modern higher-current PV modules. 

Key Technology

• 125kW Three-Phase Output
  Delivers 125kW rated AC output power for large-scale grid-tied photovoltaic installations.

• Tigo Rapid Shutdown Transmitter Configuration
  The -RSS suffix identifies the inverter configuration with a Tigo MLRSD transmitter for compatible module-level rapid shutdown systems.

• 10 Independent MPPTs
  Provides 10 MPPT trackers and support for up to 20 PV input strings, allowing flexible array design across multiple orientations and operating conditions.

• 32A Input per MPPT
  Each MPPT supports up to 32A maximum input current, while Solis highlights string-current support up to 16A per string for compatibility with higher-current modules.

• 1000VDC Maximum Input
  Supports PV system voltages up to 1000VDC, with a rated voltage of 720V for the 125kW model.

• Wide 180–1000V MPPT Range
  A broad operating window helps provide design flexibility across different string lengths and module types.

• 98.8% Maximum Efficiency
  High conversion efficiency helps maximize energy delivered from the PV array to the utility grid.

• 98.2% CEC Efficiency
  CEC-rated efficiency of 98.2% supports strong real-world energy conversion performance.

• >1.5 DC/AC Ratio Support
  Solis specifies support for DC/AC ratios greater than 1.5, allowing substantial DC array oversizing where appropriate.

• Intelligent String Monitoring
  Integrated string monitoring helps identify underperforming strings and simplifies system diagnostics.

• Smart I-V Curve Scanning
  Built-in I/V curve scanning provides additional diagnostic capability for PV array performance analysis.

• Integrated AFCI
  Arc-fault circuit interruption is built into the inverter to proactively reduce fire risk associated with PV DC arcing.

• Integrated PID Recovery
  Nighttime PID recovery functionality helps mitigate potential-induced degradation in compatible PV arrays.

• Type II DC & AC Surge Protection
  Includes Type II surge protection on both DC and AC sides.

• NEMA 4X Enclosure
  Rugged enclosure supports demanding outdoor installation environments.

• C5 Anti-Corrosion Level
  Solis identifies the platform with C5 anti-corrosion protection, supporting use in harsh environmental conditions.

Best Uses

• Large Rooftop PV Systems
  Ideal for high-capacity rooftop solar installations requiring 480V three-phase interconnection.

• Distributed String-Inverter Architectures
  Well suited for projects using multiple high-power string inverters instead of a centralized inverter architecture.

• Systems Requiring Tigo Rapid Shutdown
  The RSS configuration is designed for projects using compatible Tigo module-level rapid shutdown devices.

• Complex PV Arrays
  Ten MPPTs and twenty string inputs provide flexibility for arrays with different orientations, roof sections, or operating conditions.

• Higher-Current PV Modules
  Supports up to 32A per MPPT and string currents up to 16A, making it suitable for many modern high-current modules.

Product Specifications

High-Power 125kW String Inverter with Tigo Rapid Shutdown Integration

The Solis S5-GC125K-US-RSS combines 125kW three-phase output, 10 MPPTs, 20 PV string inputs, 1000VDC architecture, 98.8% maximum efficiency, integrated AFCI and PID recovery, Type II surge protection, intelligent string monitoring, and a factory Tigo rapid shutdown transmitter configuration in a rugged NEMA 4X inverter designed for high-capacity grid-tied PV systems.

Why Buy From US Solar Supplier

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Our inventory is updated daily with the latest solar technologies, and our experienced team is ready to assist with product selection, system design, and installation guidance.

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