Automatic Transfer Switches & Generator Accessories

Automatic transfer switches, manual transfer switches, remote monitoring modules, cold weather kits, wireless-monitoring kits, extended run tanks, and other standby generator accessories. Matched sizing from 100A to 1000A for residential, commercial, and industrial standby systems.

What an automatic transfer switch does

An automatic transfer switch (ATS) sits between the utility meter and your panel. When grid power drops, the ATS signals the generator to start, transfers the load in seconds, and switches back — and shuts the generator down — when utility power returns. Match the ATS to both your service size (100A, 200A, 400A) and your generator's output; service-entrance-rated models combine the disconnect and the transfer in one enclosure, saving wall space.

Automatic vs manual transfer switches

An ATS gives hands-off, whole-home backup — it works whether you're home or not. A manual transfer switch costs less and suits portable generators and outbuildings; see the manual transfer switch collection. For pairing guidance, the transfer switch sizing chart matches common service sizes to ATS amperage.

Generator accessories

Cold weather kits keep batteries and oil viscous through freeze cycles, extended run tanks add fuel capacity beyond the standard 24–48 hours, and remote monitoring modules put status and run data on your phone. Pair any standby system with the right accessories — Generac, Kohler, Cummins, and Briggs & Stratton units are all in stock in the standby home generators collection.