wiring solar to batteries
I had a brain fart. I have 2 12 v batteries do I wire the controller to each battery or pos to one neg to other or or to the on that is farthest away for the FW connection ?
Forum Discussion
Colo Native wrote:
it is 45A Mppt and the run is under 3'. it said wire is rated 65 amps
65A is the wire ampacity, i.e. the current when cable starts "deteriorating", whatever it means. I assume this is when insulation is getting soft and/or melting away.
45A MPPT doesn't mean much without knowing the array size. This is why I asked about "max post-controller current" - meaning in YOUR particular situation.
Anyway... even if you install 600W array and manage to max your controller up, 45A current in #6 cable @3ft length will result in 0.9% voltage drop, this is within the norm. 45A is within the norm of cable ampacity as well.
I would be (a little) worried about 45A being that close to 65A "point of destruction", but let professional electricians comment from practical experience, I'm not the one.
