• UPS-Level Backup Transfer: Delivers ultra-fast <10ms automatic transfer switching between grid-tied and off-grid backup modes.
• Commercial C&I Power Capacity: Handles up to 138 kVA (200A max current) throughput on the backup interface when grid is present.
• Seamless Hybrid Inverter Integration: Purpose-built to pair with GoodWe ET 50kW Series (GW50K-ET) high-voltage hybrid inverters.
• Auxiliary Generator Control: Supports diesel generator integration and control (55 kVA max) for multi-source backup reliability.
• Heavy Inductive Load Support: Accommodates large 3-phase commercial electrical loads including heat pumps, compressors, and motors.
• Industrial-Grade Weatherproofing: IP65 weather-sealed housing with Natural Convection cooling for indoor or outdoor wall mounting.
The GoodWe STS200-80-10 Commercial Static Transfer Switch Box (Code: 1079) is an automatic power transfer and grid-isolation system. It is engineered specifically for commercial facilities, industrial factories, agricultural setups, and large energy storage projects.
Operating as the central power coordination hub for GoodWe ET 50kW Series (GW50K-ET) hybrid inverters, this switch enables ultra-fast <10ms transfer switching during utility grid failures. It isolates the local site network from the main grid to maintain continuous UPS-level electricity to critical three-phase loads.
The GoodWe STS200-80-10 Commercial Static Transfer Switch Box supports up to 138 kVA (200A) pass-through power capacity while grid connected. Featuring direct diesel generator integration, an IP65 weatherproof enclosure, and RS485 inverter communication, it ensures uninterrupted power for heavy inductive machinery.
| Model Name | GoodWe STS200-80-10 (Code: 1079) |
| Device Function & Topology | Automatic Static Transfer Switch / Non-isolated Grid Isolator |
| Nominal Output Voltage | 380 / 400 V, 3L/N/PE Three Phase |
| Output Voltage Operating Range | 176 V – 276 V |
| Nominal AC Frequency Range | 50 / 60 Hz (45 – 65 Hz Range) |
| Inverter Side Capacity | 50.0 kVA Nom. / 50.0 kVA Max (72.5A / 75.8A Max) |
| Grid Side Capacity | 50.0 kVA Nom. / 50.0 kVA Max (72.5A / 75.8A Max) |
| Backup Side Nominal Power | 50.0 kVA (72.5A Nominal) |
| Max. Backup Power (Without Grid) | 55.0 kVA Off-Grid Backup (83.3A Max) |
| Max. Backup Power (With Grid Present) | 138.0 kVA / 138.0 kW (200A Max Purchased Current) |
| Generator / PV Inverter Side Capacity | 50.0 kVA Nom. / 55.0 kVA Max (72.5A Nom. / 83.3A Max) |
| Nominal Relay Ratings | AC Side Relay: 200A / Generator Side Relay: 90A |
| Automatic Transfer Switch Time | < 10 ms (Uninterruptible UPS Level) |
| Cooling Method | Natural Convection (Fan-less) |
| Inverter Communication Interface | RS485 Protocol |
| Ingress Protection Rating | IP65 Certified Dust & Waterproof |
| Operating Temperature Range | -35°C to +60°C |
| Max. Operating Altitude | 4000 m |
| Dimensions (W x H x D) | 510 x 425 x 156 mm |
| Device Weight | 16.5 kg |
| Mounting Method | Wall Mounted Enclosure |
| Safety & EMC Compliance | IEC62109-1/-2, EN61000-6-1, EN61000-6-2, EN61000-6-3, EN61000-6-4 |
Contact our engineering support team prior to wiring the GoodWe STS200-80-10 Commercial Static Transfer Switch Box. You can also verify installation and grid isolation diagrams on the official GoodWe Solar Official Portal.
The GoodWe STS200-80-10 Commercial Static Transfer Switch Box delivers automatic power grid isolation. It prevents reverse power feed into utility lines during blackouts while maintaining continuity for essential facility loads.
Capable of executing transfer transitions in less than 10 milliseconds, the STS box operates fast enough to keep sensitive IT servers, security networks, and commercial equipment running without rebooting or experiencing power interruption.
Featuring a dedicated generator input terminal with a 90A rated relay, the system orchestrates auxiliary diesel generator startup and synchronization. This allows facilities to recharge energy storage battery banks during extended multiday utility outages.
Housed in an IP65 weather-sealed chassis, the unit supports wall-mounted installation in outdoor or indoor electrical switchrooms. It withstands harsh ambient temperatures from -35°C to +60°C with silent, natural convection cooling.
Q1: What is the primary function of the GoodWe STS200-80-10 Static Transfer Switch?
A: The STS200-80-10 automatically switches commercial power loads between the utility grid, hybrid solar/battery inverters, and backup generators in under 10 milliseconds during outages.
Q2: Is the STS200-80-10 required for backup operation on the GoodWe GW50K-ET inverter?
A: Yes, the STS box is required to enable automatic off-grid switching and UPS-level backup functionality for the GoodWe 50kW ET Series hybrid inverter.
Q3: What is the maximum load current supported by this static transfer switch?
A: When grid power is available, the unit supports up to 138 kVA (200A max current); off-grid backup mode supports up to 55 kVA (83.3A max current).
Q4: Can the STS200-80-10 integrate with diesel generators?
A: Yes, it includes a dedicated generator input side supporting up to 55 kVA (83.3A max current) with a 90A generator relay for backup synchronization.
Q5: What are the physical dimensions and protection rating of this unit?
A: The IP65 weatherproof unit measures 510 x 425 x 156 mm and weighs 16.5 kg.
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