I know there is lots of info out there, but I can't find a definitive guide on the best solution. People seem to have very complex systems with all sorts of extra inverters, fuses, breakers and shunts etc. Yet there are also quite simple systems. I am thinking of the latter. I have two 95ah AGM batteries and a long roof on a Possl Roadcar. I think something in the region of 300 to 360 watts would be good to sustain us for some off grid travel, and I can achieve this with one or two panels, matched to 6mm cable going direct to the batteries rather than my EBL119. If I added a battery master or equivalent or used a Votronic duo controller, that ensures leisure and vehicle batteries are covered. The only other question is therefore would I have 24v or 12v panels. Does it need to be more complicated than that or am I missing something and other than cable sizing does the voltage question make much of a difference? Thanks.