Description
GoodWe GW125K-STS-G10 is a 125 kW static transfer switch for the backup path of GoodWe ET 80, 99.99 and 100 kW hybrid inverters, with on/off-grid transfer in under 10 ms.
GoodWe GW125K-STS-G10
Backup transfer in under 10 ms for the backup path of the paired ET inverter.
Matched to the ET 80 to 100 kW band: this STS is designed for the GoodWe ET 80, 99.99 and 100 kW hybrid inverters.
Four sides at 210 A: Grid, Back-up, Smart Port and Inverter each carry the 125.0 kW rating.
Generator-ready: Diesel generator control is listed for this switch.
210 A on all four power sides
The Grid, Back-up, Smart Port and Inverter sides each carry 210 A rated and maximum current. Rated power is 125.0 kW, or 75 kW on 220 V systems; maximum apparent power is 137.5 kVA, or 75 kVA on 220 V.
Generator control built in
The switch supports diesel generator control and large-load connection for C&I applications. The installation guide's power-on diagram places a generator or large loads on their own breaker at the STS. It talks to the inverter over RS485.
IP54 enclosure for indoor or outdoor walls
The wall-mounted enclosure is IP54 and rated for indoor or outdoor installation from -35 to +60 °C. It measures 680 × 620 × 165 mm and runs intelligent air cooling at 45 dB.
STS Series
Backup switching for the ET 80 to 100 kW band
The GW125K-STS-G10 is designed for the GoodWe ET 80, 99.99 and 100 kW hybrid inverters, for grid and off-grid operation in larger commercial and industrial storage systems. The switch is its own wall-mounted enclosure, wired between grid, inverter and backup loads.
Technical data
For the backup design
- Rated power per side
- 125.0 kW
- On/off-grid transfer
- < 10 ms
- Rated and max. current
- 210 A
- Ingress protection
- IP54 (indoor or outdoor)
About these specifications
125 kW transfer switch for the ET 80 to 100 kW backup path.
Paired with GoodWe ET 80, 99.99 and 100 kW hybrid inverters, the GW125K-STS-G10 transfers between grid and off-grid operation in under 10 ms. Each of its four power sides is rated 210 A and 125.0 kW (75 kW at 220 V).
Ratings per side (Grid, Back-up, Smart Port, Inverter)
- Nominal voltage
- 127/220 V, 220/380 V, 230/400 V, 240/415 V, 3L/N/PE
- Voltage range
- 114 ~ 280 V (according to local standard)
- Nominal frequency
- 50 / 60 Hz
- Frequency range
- 45 ~ 55 / 55 ~ 65 Hz
- Rated current
- 210 A
- Max. current
- 210 A
- Rated power
- 125.0 kW (75 kW at 220 V)
- Max. apparent power
- 137.5 kVA (75 kVA at 220 V)
Switching and control
- On/off-grid transfer time
- < 10 ms
- Generator control
- Diesel generator control
- Communication
- RS485
- Supply system
- TN-S, TN-C, TN-C-S, TT
Mechanical and environment
- Ingress protection
- IP54
- Mounting
- Wall mounted
- Installation type
- Indoor / outdoor
- Operating temperature
- -35 ~ +60 °C
- Relative humidity
- 0 ~ 100 %
- Max. operating altitude
- 4000 m
- Dimensions (W × H × D)
- 680 × 620 × 165 mm
- Noise emission
- 45 dB
- Cooling
- Intelligent air cooling
Project fit
Where this model fits.
Scenarios that show which projects the GoodWe GW125K-STS-G10 belongs in, and the limits behind our engineers' recommendation.
Backup path for a GoodWe ET 80 to 100 kW system
A commercial or industrial storage system built on a GoodWe ET 80, 99.99 or 100 kW hybrid inverter needs grid and off-grid switching on its backup path.
GW125K-STS-G10 is the transfer switch for that inverter band. Its technical table gives on/off-grid transfer in under 10 ms and 210 A on each of the four power sides.
- Inverter: ET 80, 99.99 or 100 kW
- Grid: 127/220 to 240/415 V, 3L/N/PE; TN-S, TN-C, TN-C-S or TT
- Wall position: 680 × 620 × 165 mm, with at least 200 mm above and at each side, 500 mm below and 800 mm in front
Documents
Product questions
Which GoodWe inverters is this transfer switch paired with?
The datasheet pairs the GW125K-STS-G10 with the GoodWe ET 80/99.99/100kW hybrid inverter.
What does the wall position need to allow for?
The unit is wall mounted. The installation guide shows clearances of at least 200 mm at the sides and at least 800 mm in front, with the wall area at least 1100 mm high and 500 mm wide; the unit itself is 680 mm wide, 620 mm high and 165 mm deep.
Can a generator or large loads be part of this backup design?
Yes. The datasheet lists diesel generator control and support for large-load connection for C&I applications. The installation guide shows generator and large loads in the commissioning and monitoring diagram.
How does the switch communicate with the inverter?
The datasheet lists the communication method of the GW125K-STS-G10 as RS485.