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
That's an amusing post. First you disagree with me, and then at the end do agree.
Fact is, no matter where you are, temperature rise will degrade mppt gain. It's just a matter of how much.
If you got 1000W/m^2 irradiance, then a one meter square panel will absorb about 800W continuous. It doesn't matter what the ambient temp is, the panel will get hot!
Sal
Fact is, no matter where you are, temperature rise will degrade mppt gain. It's just a matter of how much.
If you got 1000W/m^2 irradiance, then a one meter square panel will absorb about 800W continuous. It doesn't matter what the ambient temp is, the panel will get hot!
Sal
ktmrfs wrote:Salvo wrote:
You're beginning to see the negative sides of mppt. From the get-go, mppt has about 30% advantage over pwm. But much of that advantage evaporates. Sal
not really. MPPT will do better, ...
And if I was strictly using a panel in the summer in the southern US in high temps, not sure that MPPT would be enough gain to justify the expense.
