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The Static Transfer Switch (STS) is a cabinet-based, high-performance switching solution designed for commercial and industrial energy storage systems. Fully compatible with GoodWe ET Series 80 kW, ET Series 100 kW and ETR Series 80 -125kW, it enables UPS-level on- and off-grid switching with ultra-fast response time. The STS provides precise control of hybrid inverters, enabling seamless transitions between grid-tied and off-grid modes so that, in the event of a grid outage, critical loads are continuously powered by solar energy or batteries and smoothly reconnected to the grid once power is restored. Featuring a smart configurable port, the STS integrates PV, energy storage and diesel generators into one coordinated system, delivering a flexible, resilient and cost-optimized microgrid solution. As a scalable cabinet solution, it supports parallel inverter systems and large inductive loads such as motors and heat pumps, ensuring reliable operation across diverse C&I applications.
UPS-level on/off-grid switching with ultra-fast response
Flexible microgrid integration with PV, storage and diesel generators
375 kW / 750 kW scalable design for optimized system sizing
Outdoor-ready design with stable operation across wide temperature conditions
OVERVIEW
Model
GW750K-STS-A-G10
Nominal Voltage (V)
127 / 220, 220 / 380, 230 / 400, 240 / 415, 3L / N / PE
Voltage Range (V)
114 ~ 280
Max. Apparent Power on Grid Side (kVA)
750@400V (400@220V)
Ingress Protection Rating
IP54
Model
GW375K-STS-A-G10
Nominal Voltage (V)
127 / 220, 220 / 380, 230 / 400, 240 / 415, 3L / N / PE
Voltage Range (V)
114 ~ 280
Max. Apparent Power on Grid Side (kVA)
375@400V (200@220V)
Ingress Protection Rating
IP54
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