Quote:
Originally Posted by Stircrazy
ya the only time you actually see VOC is when there is no load and it's an open circuit. The only reason I even care about it is you can check to see the condition of a bare panel using it and you have to know what the voltage could go up to if a cable brakes or component fails.
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Here is the data for my 2 REC Panels. I checked the volts entering the solar controller today. It maxed at 69.6. This was considerably higher than the predicted 24 volts per panel. We’ve had rain the last 2 days. Today there was about 5 hours of sunshine. In any event the point of this thread was to assure the OP he would be fine using the 10 gauge pre-wire from the roof to the solar controller.