Quote:
Originally Posted by rlh1957
The problem I had wad the “prewiring” wire gauge only allowed limited amount of panel wattage. Seems what came prewired was for a 200 Watt panel with room to expand to 400 watts. Their prewire was the minimum gauge. They want it to appear plug snd play.
So we ended up pulling heavier gauge wire from roof.
We have 2200 watts of panels on the roof.
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I have 540 watts of solar panel using that 8 gauge wire. My panels current rating is 12.5 amps. All three panels wired in series produce 12.5 amps of current which is easily handled by that 8 gage wire. That same three panels produce about 60 vdc. My Rich Solar 40 Amp MPPT solar charger is rated for a max input voltage of 100vdc.
While there are certain advantages to running solar panels in parallel such as no single point of failure, there are definite advantages to run in series also.