Elkhart Supply ES50M-65N RV Trailer Camper Electrical Automatic Transfer Switch Power Transfer Switch; Transfers Power From Shore To Generator; Automatic; 240 Volt AC; 50 Amp; 8-1/2 Inch Length x 4-1/2 Inch Width x 8-1/2 Inch Height Automatically Switches From Power Cord To Generator. Heavy Duty Contactor Assembly Specifically Designed For Rigorous Use, Will Handle 50 Ampere Power Cord And Up To 12 Kilo Watts Generator Transfers Both Hot And Neutral Legs Simultaneously. Economical And Reliable Time Delay Switches Automatically From Shoreline To Generator Power Capable Of Monitoring For Low Generator Voltage, Built-In Time Delay Allows Generator To Get Up To Speed Quick And Easy Installation