I am starting to integrate the camper to the truck electrical system ! I think stock alternator is around 60 amps! Any advice on how big i need , i have 3 batteries! I am not even sure what is available!? looks like fun at any rate!! I just put in another battery tray on the drivers side,and there is an isolator by the jack mount. any way I thought it might be a good discussion! thanks in advance! D