HI Guys and Gals i have a caravan and want to install some solar, l can fit five 200watt 19.8v max panels, with 4 120a lithium batteries and a 150/70 MMPT smart solar, should i wire them in series or parallel? l only have a 6mm cable from the roof of the van to where the switchboard is and it will be a hard job to upgrade this.
any advice is appreciated.