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
Where would you ever "see" any panel voltage when using an MPPT controller? You do see it with PWM because it is the same as battery voltage, at least with 12v panels. anyway---
If the "voltage at maximum power" is 30v and you see that you are getting the 1000 irradiance (or are you?) by the fact you see rated Isc, --
--does that mean you will get full power at 30v (where I is 7.67, so power is rated at 230w) despite the measured Voc being only 34.5? (at 15C too---doesn't Voc go up when it is colder than 25C?)
Does the full Isc really indicate full irradiance for panel power?
Temp coefficients are:
P minus 0.45%/degreeC
V minus 0.34%/degreeC
I plus 0.06%/degreeC
If the "voltage at maximum power" is 30v and you see that you are getting the 1000 irradiance (or are you?) by the fact you see rated Isc, --
--does that mean you will get full power at 30v (where I is 7.67, so power is rated at 230w) despite the measured Voc being only 34.5? (at 15C too---doesn't Voc go up when it is colder than 25C?)
Does the full Isc really indicate full irradiance for panel power?
Temp coefficients are:
P minus 0.45%/degreeC
V minus 0.34%/degreeC
I plus 0.06%/degreeC
