O.k folks,be gentle with me.Been a funster for 4 months now and only asked one other question!Where to start,my comprehensivley equipped old Merc,"Matilda"since you ask.(I fancied Astrid but that's another story)Anyway she came with everything but instructions,so,re zig panel.It has a three way switch with two little diagrams.One looks like a caravan and cannot remember what t'other one depicts.Centre possitition on switch I took to be off.(As you do!).When I hook up to mains,lights come on if I've left them in on pos.(Keeping up?)If I flick switch to right,needle on dial goes up to 13.7 or so.However,when I flick to left needle is low.I need to know whether she charges batteries automaticaly when I hook up,or whether I have to move zig switch over to left or right?With switch in centre (off? )position I am able to use the 240.v.plug sockets.:helpsos: Yours .