Been doing the Sparkolator thingy again to finish off the dual lithium battery install, that crinkly plastic cable protector stuff is a pain to fit, Anywho the twin 30A solar regs are wired to the batteries --power gets through the twin manual iso switches from the Alternator --- the in cab wires for the fridge get a nice 13.3 V at the plug end and to top it all off the dual Volt meters have a slight .2 varience, but they show a pretty Blue read out display so thats not a problem ..
Amazingly there was'nt even any magic smoke .... Winner
Just got to mount the Aircompressor / Tank / Flexi solar panel and wire them up next ..
Edit: Yes that is, Good O'l cardboard and 100 MPH Tape making the cover for the Voltmeters, it works fine and will last for many years .