Esco ES350 Automatic Transfer Switch for 350A Power Sources 240VAC 50 AMPS/POLE Automatic switching between shorepower, generator and inverter Designed for rigorous use utilizing two heavy duty contactors rated up to 50 amps 120/240v shoreline, 12kw generator and an inverter relay rated 6kw, 50 amps 120v Transfers both hot and neutral legs simultaneously Designed to shed inverter power loads when used with a 30 amp transfer switch