Solar Panel Voc-MPPT?
Wondering if there is any relationship between measured Voc and MPPT performance with a 24v panel. My 12v panel has a Voc rating of 21.9 and Isc of 8.2, but I often see 8.2ish when Voc is only 20....
Forum Discussion
Salvo wrote:
MPPT gains over pwm are in the 8% region when battery is held between 12.0 and 12.4V. What do you think the gain becomes when battery is at 13.0V?
I have solar for well over 6 years. Battery surface charge plays a major role in charging.
Sal
Gain of what?
A good charge controller will taper off the current/charge into the battery when the battery voltage increases above various SOC percentages - this operation reduces gassing and internal battery temperatures, and thereby increases battery life.
Bulk, Float, and Equalize charges all perform quite differently and are a function of charge control algorithms that vary with manufacturer, design topology, and model.
This means no blanket assertion, based on a specific test, under non-controlled conditions will give quantitative absolute results, but rather will give limited, qualitative type results.
