Solar combiner box questions
I'm looking for a solar panel combiner box for the RV's roof. I'm going to start with 2 panels with the option to add 2 more if needed. I've seen some that are stupid expensive and some that aren'...
Forum Discussion
johnm1 wrote:
red31 - your data shows a 20' run. That's the distance from the pv panels to the CC right? As in, they are 20' apart, not 10 feet.
Using MC4 10 guage extension wire gives a ~ 0.38V drop at 20' ... and this is OK? So using 8 gauge extension wire would be even better at ~ 0.23V drop at 20' ... right?
yes the distance in question is between the solar panel connectors and the CC.
.38v voltage drop for series is at max performance, will be less anytime the amps are less than 9.25, absorption and float, not pointed at sun, clouds ...!
.38/64.6 (Vmp 32.3v X 2) see the correct spec sheet for the 290-300.
is .00588
295 X 2 X .00588 is less than 4 watts, ya loose more from panel heating, gonna trow dough at some sort of panel chiller?
