10 MPPT w/ AFCI w/ FAN w/APS MLRSD Transmitter
The Solis S5-GC125K-US-APST is a powerful three-phase grid-tied inverter tailored for large-scale commercial and industrial solar projects. With 10 separate MPPTs and up to 20 string inputs, it optimizes energy capture from high-current solar modules. Advanced safety measures, including built-in AFCI and PID recovery, ensure reliable and secure operation while maximizing your system’s efficiency.
With an APS transmitter for rapid shutdown compliance, it supports U.S. safety standards, including NEC 690.12-2020 and UL1741SB. Its NEMA 4X enclosure makes it ideal for outdoor deployments in harsh environments.
Best Use
Commercial Rooftops: Ideal for large multi-array commercial installations requiring RSD compliance.
Utility-Scale Projects: Delivers high output and advanced grid integration for solar farms.
Outdoor Installations: Built to withstand extreme weather with a Type 4X corrosion-resistant enclosure.
Smart Grid Ready: Integrates easily with utility and energy monitoring platforms.
Key Benefits
High Power Output: Delivers 125kW with a high DC/AC ratio and multiple MPPT channels for optimal string flexibility.
Rapid Shutdown Ready: Built-in APS MLRSD transmitter for code-compliant rooftop systems.
Superior Efficiency: Max. efficiency of 98.8% and CEC efficiency of 98.2% for reduced energy loss.
All-Weather Design: Type 4X enclosure and wide temperature tolerance for reliable outdoor performance.
Smart Monitoring: Built-in RS485 and Ethernet with optional Wi-Fi/Cellular for remote access and I-V curve scan.
Special Technology
10 MPPTs with 20 Strings: Allows flexible system design and shading mitigation for large arrays.
Intelligent Fan Cooling: Redundant fan system ensures stable operation under full load.
AFCI & Integrated PID Recovery: Protects system from arc faults and restores panel voltage performance at night.
Advanced Protection Suite: Includes DC/AC surge protection (Type II), reverse polarity protection, and anti-islanding.
Smart IV Curve Scan: Enables real-time fault diagnosis and module-level insights.
Warranty
The Solis S5-GC125K-US-APST inverter includes a standard 10-year warranty, extendable through Solis-certified installers and programs.
Specifications
| Specification |
Data |
| Model Number |
S5-GC125K-US-APST |
| Rated AC Power |
125,000 W |
| Max. DC Input Voltage |
1000 V |
| Start-Up Voltage |
195 V |
| MPPT Voltage Range |
180–1000 V |
| Full Load MPPT Range |
550–850 V |
| Max. DC Input Current |
10 × 32 A |
| Short-Circuit Current |
10 × 50 A |
| MPPTs / Strings |
10 MPPT / 20 Strings |
| AC Output Voltage |
3Φ / PE, 480 V |
| Frequency |
60 Hz |
| Max. AC Output Current |
150.4 A |
| Power Factor |
> 0.99 (adjustable from 0.8 leading to 0.8 lagging) |
| Max. Efficiency |
98.8% |
| CEC Efficiency |
98.2% |
| Topology |
Transformerless |
| Nighttime Consumption |
< 2 W |
| Enclosure Rating |
Type 4X (NEMA 4X) |
| Cooling |
Redundant Intelligent Fan |
| Operating Temp Range |
-22°F to 140°F (-30°C to 60°C) |
| Max. Altitude |
13,120 ft (4000 m) |
| Communication |
RS485, Ethernet; Optional: Wi-Fi, Cellular |
| Certifications |
UL1741SB, UL1741SA, IEEE 1547-2018, NEC 690.12-2020, FCC Part15 ClassB, HECO Rule 14H |
| Dimensions (W × H × D) |
41.9 × 22.3 × 13.6 in |
| Weight |
200 lbs |
| Warranty |
10-Year Standard Warranty |
FAQs
Is the S5-GC125K-US-APST compatible with my solar panels?
Yes, the S5-GC125K-US-APST is compatible with a broad range of commercial and utility-scale PV modules. Your installer will assess your system design and confirm compatibility based on voltage, current, and array size.
Do I need a battery to use the S5-GC125K-US-APST?
No, this is a grid-tied inverter and is designed primarily for direct connection to the utility grid. It does not require a battery for standard operation. However, battery integration may be possible through external energy storage systems, depending on your overall system design.
How do I monitor the performance of my S5-GC125K-US-APST?
The inverter includes advanced monitoring features, typically via RS485 and optional Wi-Fi or Ethernet modules. These allow real-time performance tracking, fault detection, and energy production monitoring via web platforms or mobile apps.
What happens if there is a power outage?
Since the S5-GC125K-US-APST is a grid-tied inverter without built-in backup functionality, it will automatically shut down during a power outage to comply with safety standards. It does not provide backup power unless paired with an external hybrid or storage system.
How do I maintain the S5-GC125K-US-APST?
Maintenance is generally minimal. It's important to keep the inverter's ventilation areas clean and unobstructed. Periodic visual inspections and firmware updates (if applicable) are recommended. Your installer may offer scheduled maintenance services.
What is the efficiency of the S5-GC125K-US-APST?
This model offers high conversion efficiency. Refer to the official Solis datasheet for detailed efficiency metrics, including maximum and European weighted efficiency ratings.
What are the input and output voltage ranges?
The S5-GC125K-US-APST supports 1000V DC input and has an AC output range of 208-480V (3-phase). Consult the product datasheet for detailed values including MPPT voltage range, startup voltage, and nominal output voltage.
What communication protocols does the S5-GC125K-US-APST use?
It supports RS485 as standard and can be upgraded with options like Wi-Fi, GPRS, or Ethernet for remote monitoring. Compatibility with third-party monitoring platforms may also be available.
