Wiring Size - Panels to Charge Controllers/Battery Bank
I'm hoping you guys can help me with some remidial confusion on wiring and voltage loss. To get the best unobstructed sunlight, I'm thinking of mounting my panels ~130 ft from my charge controller and battery bank. I'm planning on (2) 205W Kyocera panels, wired in series to be 48V (8.5 amps). These panels require the MC4 connectors, so I was planning on buying 130' of 10 AWG MC4 wiring from our forum's sponsor. I'm concerned, though, as to whether I would have too much voltage loss. I used the voltage drop calculator on this forum, and it would appear that I would be under 3% loss at 130' (assuming I entered everything correctly). However, do I need to enter my distance as 260', since it's twice the length from the panels to the charger/batteries? If it should be 260', I would be over 5%, which would be too much, I assume. However, MC4 wiring isn't available at anything less than 10 AWG. If that were the case, would I need to use MC4 wiring to run to a combiner box near the panels, and then run 6 AWG wiring from the combiner box to the charger/batteries? It's obviously a big jump in wiring prices over 130', if I go from the MC4 10 AWG wiring to 6 AWG wiring. Any thoughts would be appreciated.
0 · Share on Twitter