GoodWe 125kW ET100 STS HV Static Transfer Switch
In stock at supplier. All prices include VAT. 🚚 Same-day delivery available for morning orders in Gauteng, with FREE delivery within 10 km. Orders below R1,500 may incur a delivery fee. Orders containing only one solar panel will incur an additional charge and will be requoted accordingly. If an item becomes unavailable after purchase, we will offer a full refund or an alternative product. 💬 Confirm stock or request a quotation via the WhatsApp button below with our sales team.
R30075.00
In stock at supplier. All prices include VAT. 🚚 Same-day delivery available for morning orders in Gauteng, with FREE delivery within 10 km. Orders below R1,500 may incur a delivery fee. Orders containing only one solar panel will incur an additional charge and will be requoted accordingly. If an item becomes unavailable after purchase, we will offer a full refund or an alternative product. 💬 Confirm stock or request a quotation via the WhatsApp button below with our sales team.
GoodWe 125kW ET100 STS HV Static Transfer Switch
The GoodWe GW125K-STS-G10 125kW STS is a high-power Static Transfer Switch (STS) designed for commercial and industrial energy-storage systems. It is specifically designed to work with the GoodWe ET100kW HV hybrid inverter, providing rapid automatic transfer between grid-connected and off-grid operation. GoodWe specifies a transfer time of less than 4 ms, making it suitable for UPS-level backup applications and critical loads. GoodWe
Key Features
- 125kW rated power
- 137.5kVA maximum apparent power
- Designed for GoodWe ET100kW HV hybrid inverter
- <4 ms on-grid/off-grid transfer time
- Supports three-phase + neutral + PE
- Compatible with 220/380V, 230/400V and 240/415V systems
- Supports 50/60Hz
- Supports generator integration
- Suitable for large loads including motors and heat pumps
- Designed for commercial & industrial energy storage
- RS485 communication
- Intelligent air cooling
- Indoor or outdoor installation
- Wall-mounted design
- IP54 enclosure protection GoodWe
Technical Specifications
| Specification | GoodWe GW125K-STS-G10 |
|---|---|
| Product Type | Static Transfer Switch (STS) |
| Compatible Inverter | GoodWe ET100kW HV |
| Rated Power | 125kW |
| Maximum Apparent Power | 137.5kVA |
| Rated Current | 210A |
| Maximum Current | 210A |
| Nominal Voltage | 127/220V, 220/380V, 230/400V, 240/415V |
| System Configuration | 3L / N / PE |
| Voltage Range | 114–280V |
| Frequency | 50/60Hz |
| Frequency Range | 45–55Hz / 55–65Hz |
| Transfer Time | <4ms |
| Communication | RS485 |
| Cooling | Intelligent air cooling |
| Operating Temperature | -35°C to +60°C |
| Maximum Altitude | 4,000m |
| Humidity | 0–100% RH |
| Protection Rating | IP54 |
| Installation | Wall mounted |
| Installation Environment | Indoor / Outdoor |
| Dimensions (W × H × D) | 680 × 620 × 165mm |
| Weight | 21kg |
| Noise | 45dB |
| Electrical Systems | TN-S, TN-C, TN-C-S, TT |
Specifications are based on GoodWe’s current GW125K-STS-G10 datasheet.
The ET100kW HV hybrid inverter works together with the 125kW STS to provide fast backup switching:
Normal grid operation
Grid → STS → ET100 → Critical/Backup Loads
Grid failure
Grid failure → STS transfers in <4ms → ET100 operates off-grid → Loads remain powered from battery/PV
Grid restoration
Grid restored → STS transitions back to grid operation → Normal operation resumes. GoodWe
The STS also provides a smart port for integrating additional energy sources and supports diesel generator control, making it suitable for larger C&I microgrid and backup-power installations. GoodWe
Recommended Application
GoodWe ET100 + GW125K-STS-G10 is particularly suitable for:
- Commercial solar installations
- Industrial energy storage
- Factories and warehouses
- Data centres and critical infrastructure
- Large backup-power systems
- Solar + battery + generator microgrids
- UPS-level critical-load applications
- Large three-phase loads
Product: GoodWe GW125K-STS-G10 125kW Static Transfer Switch
System: GoodWe ET100kW HV Hybrid Inverter + STS
Power: 125kW / 137.5kVA
Transfer: <4ms
Application: Commercial & Industrial Energy Storage / Backup Power
