It's a 12 volt system, 420 watts total. (2) 85 watt panels
, and (2) 125 watt panels
. Since the panels are in different locations on the boat, I wired the 85s together as one pair, and the 125s together as another, then where the cable enters the boat I spliced both pairs together.
I used 10 gauge for everything, because based on someone's recommendation, that should be sufficient. Now I'm hearing that due to the size of the array, I should have gone heavier.
If so what size, and do I need to increase the size on everything?
Or since 12 volt panels really output (in think 19ish volts?) sorry I don't remember the exact figure, do I just need to increase the size of the cable from the controller to the batteries?
If I do need bigger cable from the panels too, would 10 gauge from each pair be sufficient, and then go heavier after where I splice the 2 pairs of panels together?
Lastly, I have a ton of 12 gauge wire, could I double that up with the 10 gauge to get a heavier wire size, instead of ripping all the 10 gauge out and replacing everything with a single
heavier gauge wire?