does anyone know what is the highest rated fuse you can put into your in line fuse connection from your leisure battery to controller etc, made a mistake this morning, not concentrating , accidentally clipped wrong terminals back onto battery while changing things around. fuse blew = no controller. i had visions of needing a new controller thinking i must have blown it, i have some old car fuses in the house, the lowest being a 15amp fuse., placed into connection and to my relief the controller came on as normal. is there a limit to the rated amp you should fit into the in-line fuse itself without doing any harm. i was given a 7.5amp fuse with controller when bought new. anyone use 15 amp and above .