Home

Many thanks Dan. Just to add a little further confusion, I've just been reading up on the he charge controller I'm intending to buy and it states the terminal size to be 13mm2. https://www.enfsolar.com/pv/charge-controller-datasheet/191 here's the link. Presumably that means I can't connect a thicker wire than 13mm2. Based on your advice and a little bit more research I've done, I think that to connect the batteries to the controller I would need 16mm2 based on a 50cm run of wire or 25mm2 based on a 1 metre run......or am I missing something?

Cheers

Hi all,

I'm I the process of converting my van and have reached the point where I can't ignore the electrical side of things any longer.....I'm going to have to get my head around it!

I've installed two 300 watt solar panels on the roof and wired them in parallel. I'm intending to connect them to a Victron 100v/50a MPPT charge controller. Sound OK? I'm basing this on 600w/12v=50Amps.

I'm then intending to connect the charge controller to two 220 amp hour,12 volt, fully sealed leisure batteries also wired in parallel to maintain a 12 volt output.

I've calculated the wire thicknesses needed for my appliances using the online calculator recommended by Mike, but I'm struggling to understand how to calculate the wire thickness required to connect the batteries together. Similarly what thickness of wire should I use to connect the batteries to the charge controller and the fuse board to the batteries? The charge controller I mentioned above doesn't have a 'load' connection, only connections for the solar panels and the batteries.

Cheers for your thoughts,

Dave