12v MPPT and 24v MPPT vs 24v PWM Test
Got a chance to try out comparing amps to the battery using MPPT vs PWM on a 24v battery bank and comparing those with the usual MPPT on 12v with my 230w panel. The bank is four 6s, so it was easy ...
Forum Discussion
pianotuna wrote:
Hi BFL,
When my system on which input is a nominal 33 volts first "wakes up" the output in amps is 0.1. I wish to know what the voltage is at that time. I'd love to compare with a nominal 17 volt system.
If I get my pie in the sky--I think the 33 volt system would wake up sooner and charge later in the day. I do not know this to be true.BFL13 wrote:
What voltage are you talking about for first light and dusk?
I don't understand any of that, sorry. You can just measure your input voltage at the controller input, which should be Vmp. You have your output voltage (battery voltage) to go with the 0.1 amps for your output watts.
If you want Voc then you have to disconnect the panel but you can still measure that at the controller input if you disconnect there.
I don't have a clue what "wake up" means in this context or why it matters. Amps are so low there is no AH advantage to be gained as to just when you do see some amps in the morning.
