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.
This is where the MPPT calculator can help.
https://www.victronenergy.com/mppt-calculator
Higher PV voltages are better but you have an odd number of panels and a low panel voltage.
You didn't state the battery voltage.
The MPPT only works at battery voltage +6V, so 19V panels aren't great for 12V systems and too small for 24V, unless in series, so that would be the best choice, just use the calc to make sure the mppt is happy.
