Hi Guys and Gals, new to campervans and have one that has a Sargent EC176 PSU installed. Everything seems to work OK, Fridge on 12v or 240v, lights etc just want to know if it should be left switched on all the time? There is a red switch which I presume is 240v and a green one which I think is 12v Should I turn them both of when the camper is not in use? Thanks.