high voltage solar panels?
Has anyone experimented with high-voltage solar panels on their RV? I'm thinking along the lines of the 250-300+ watt panels that output 40-60 volts, versus the little 25-100 watt 12 volt panels typi...
Forum Discussion
wintersun wrote:
There is a reduction in current loss with higher voltages but for the runs involved in a RV this is not a factor of any significance once you get up to 34 volts. I optimized my setup to have a total current loss of under 3% but afterwards realized how silly it was to have done so.
Add on the efficiency losses incurred by transforming from a high voltage to 12V battery voltage and it seems self defeating to run high voltage panels.
You may drop your copper losses by a percent or two but overall MPPT efficiency is down by as much as 6% for this controller.
Bruce
