GoodWe Static Transfer Switch GW125K-STS-G10
The STS Series 125kW is designed for GoodWe commercial and industrial energy storage systems, supporting fast transfer between grid-connected and off-grid operation.
Paired with compatible GoodWe ET 80/99.99/100kW hybrid inverters, including the ET 100kW series, it helps provide UPS-level switching for backup power and critical load protection. During a grid outage, the inverter can continue supplying selected loads using solar or battery power. Once grid power is restored, the system transitions back to normal grid-connected operation.
Key features:
- 125kW static transfer switch for C&I energy storage systems
- Enables seamless transition between grid-connected and off-grid operation
- Supports backup power for critical loads during grid outages
- Allows compatible inverters to operate with solar panels or batteries in off-grid mode
- Supports control of diesel generator integration
- Supports connection and control of large loads, such as heat pumps and motors
- Ultra-fast transfer time of less than 4ms
- RS485 communication
- Intelligent air cooling
- Rated Power: 125 kW
- Max. apparent power: 137.5kVA
- Rated current: 210A
- Wall-mounted design for flexible installation
- Protection rating: IP54
- Dimensions (W x H x D in mm): 680 × 620 × 165
Compatible devices:
GoodWe ET 100kW Series 3-phase hybrid inverters, including GW80K-ET-G10, GW99.99K-ET-G10 and GW100K-ET-G10. It can be used as part of a compatible GoodWe ET + BAT-C C&I battery storage system, subject to GoodWe system design and battery compatibility guidance.
| Accessory By Type | Battery Accessories , Inverter Accessories |
| Brand | GoodWe |
| Product Weight (Kg) | 21.00 |
GoodWe STS Series 125kW Datasheet - 28 02 2026.pdf
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GoodWe GW125K-STS-G10 Quick Installation Guide - 26 02 2026.pdf
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GoodWe Commercial Inverter Solutions Manual ET100kW - 03 02 2026.pdf
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GoodWe STS125kW Certificate IEC 61439 TUV - 24 10 2025.pdf
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GoodWe STS 125kW Certificate CE LVD IEC 61439 - 24 10 2025.pdf
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GoodWe Battery Compatibility Overview EMEA - 14 04 2026.pdf
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GoodWe GW Compatibility List of GoodWe Inverters and IoT Products - 26 01 2026.pdf
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Goodwe Inverter System Warranty - 05 03 2026.pdf
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