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
Somebody here did put the second voltage wire for his Trimetric at the controller ISTR, or something similar.
The voltage reading at the controller input is a real voltage. Voc is a higher voltage than that, but you can't measure it while connected. I am having trouble with Vmp whether it is real or not.
The Vmp is along the voltage scale of the IV curve, so "that amount of voltage" is one of the possible real voltages. But it was said the controller "creates" a voltage to get mp? and that is the "Vmp?" So what does that have to do with the real voltage you can measure at the controller input?
The voltage reading at the controller input is a real voltage. Voc is a higher voltage than that, but you can't measure it while connected. I am having trouble with Vmp whether it is real or not.
The Vmp is along the voltage scale of the IV curve, so "that amount of voltage" is one of the possible real voltages. But it was said the controller "creates" a voltage to get mp? and that is the "Vmp?" So what does that have to do with the real voltage you can measure at the controller input?
