m. Сміла, Незалежності, 67г. оф, 406/6
GoodWe STS200-80-10 - static transfer switch 50 kVA.
Description GoodWe STS200-80-10
GoodWe STS200-80-10 is a 50 kVA static transfer switch for three-phase 380/400 V networks. This is the part of a storage system that decides where the site draws power from at any given moment: the grid or the battery. Wall-mounted design, 17.5 kg, dimensions 510 × 425 × 156 mm, IP65 protection.
Why a separate switch is needed
Many assume that backup power needs only an inverter and a battery. For a private house that is true. But as soon as a three-phase site with serious loads is involved, a task appears that the inverter does not solve on its own: transferring consumers between sources quickly and without a voltage dip.
Mechanical contactors are not built for that — they need tens or hundreds of milliseconds, and their moving contacts burn over time. A static switch works on semiconductors, with no mechanics, and transfers so quickly that the equipment never notices.
What this delivers in practice
For a production site the most expensive scenario is not the outage itself but a process stopping mid-cycle. A CNC machine that loses power halfway through a program means a ruined workpiece and a re-setup. A server that reboots means lost transactions. An injection moulding machine means material set solid in the mould.
Fast transfer removes exactly that problem: equipment keeps running and staff learn about the interruption afterwards, from the event log.
Operating conditions that set this model apart
The key technical feature is an exceptionally wide temperature range: from −35 to +60 °C. Combined with IP65 protection, that means the device is designed for open-air installation with no heated room required.
For a site that is a real saving: the switch can hang on an exterior wall beside the switchgear or the storage unit without consuming indoor space. Permissible humidity reaches 95% and operating altitude extends to 4000 metres. Cooling is by natural convection: no fans, therefore no noise and no filters to clean.
Its place in a storage system
An STS neither generates nor stores energy — it manages flows. In a typical scheme the device sits between the grid, the inverter with its battery, and the load board, making transfer decisions according to defined rules.
It should therefore be specified together with the rest of the system rather than on its own: the switch rating must match the total load you intend to keep on backup. Fifty kilovolt-amperes corresponds to a small production shop, a large retail store or a mid-sized hotel.
Compactness as an installation advantage
At 17.5 kg the unit is light for its rating — two people mount it on a wall without lifting equipment. A depth of just 156 mm allows the switch to fit into a narrow service corridor where bulkier equipment simply would not go.
Specifying a transfer switch always starts with a list of what must stay powered. Send us the load schedule and a single-line diagram if you have one — we will check whether this model is sufficient and advise how to integrate it correctly into your scheme.
Characteristics GoodWe STS200-80-10
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