Sollatek Automatic Voltage Switcher- AVS30 (Over and Under voltage protection)- 30amps 230V with automatic voltage reconnect suitable for home, office & camper van : Amazon.co.uk: Everything Else
How to connect Automatic Voltage Switcher|AVS|AVS30|ELELCTRECA - YouTube
Natural Automatic Voltage Switcher AVS 30 – TheSunPays