So I have a battery switch in my boat that says off 1,2,or both.if I turn both battery's on does that mean I'm throwing 24v at my starter or is it still 12v going to it.im asking because I never had a battery switch before. And if I turn the switch to both batteries would I be able to charge both batteries at the same time or no.and just charge 1 at a time by turning the knob on the switch one at a time. I'm asking so I don't ruin or short any wiring out or fry anything in my boat. I'd just like to know what's going on and that's it. I posted alot of other threads on here about different things I'm having problems with and when I was on here responding to a message that's when I went in the proper places to post the right things I have going on. Thank you dan