Transfer switches

Two PROwatt automatic transfer switches

The station feeds the load, and the grid is the fallback.

We own two. Each one keeps a power station in front of a critical load, and the load falls back to the grid if the station fails. Xantrex lists the PROwatt SW Auto Transfer Switch, part 808-0915, at 120 VAC, 60 Hz, and 15 A maximum. Transfer starts when utility AC falls under 80 VAC. A continuous load stays at or under 15 A, and a tungsten filament load stays at or under 30 percent of that rating. The line ends use a Pass & Seymour clamp-lock plug and connector. Checked November 2, 2026.