More MPPT Confusion and Question
Still trying to understand my MPPT set-up and what would be the effect of changing things a bit. My 230w (30.0 Vmp x 7.7 Imp) poly panel has a Vmp of 30.0v with a measurement tolerance of +/- 3% S...
Forum Discussion
There's three possibilities for this discrepancy.
1. Irradiance fluctuates. You could be measuring mppt current when irradiance was lower.
2. Measurement error.
3. Your mppt controller is sub par.
If everything is working correctly, you should see 5 to 10% more current with mppt.
1. Irradiance fluctuates. You could be measuring mppt current when irradiance was lower.
2. Measurement error.
3. Your mppt controller is sub par.
If everything is working correctly, you should see 5 to 10% more current with mppt.
BFL13 wrote:
Salvo that is part of the big puzzle to me. The Isc was over the rated Isc of 8.3 so to me that means the panel is at least at STC for irradiance, allowing for the high temperature raising Isc but lowering Voc.
I just figure if the Isc is over its rating that means the insolation is ok, and any losses are from something else. No?
