12v battery/ 12./24v MPPT ~ 24v PV Panel
This question troubles the Old and Slow mind. I have a 24v/120w Cynergy PV panel. I would like to use it for duel purpose. For my 24v e/scooter and my 12v RV, not at the same time. The MPPT states (15...
Forum Discussion
pianotuna wrote:
Hi BFL13,
The input voltage limit does not change the output of the controller. I.e.
30 amps X 12 volts = 360 watts output, 40 amps x 12 volts = 480 watts.
Since it they are both MPPT you could feed them with up to 150 volts for the 30 amp and up to 100 volts with the 40 amp.
I.e.
150 v x 2.4 amps = 360 watts for the 30 amp
100 v x 4.8 amps = 480 watts for the 40 ampBFL13 wrote:
I got lost again how the 40amper could do more watts than the 30amper but with 100v limit where the 30 has 150. So picking panels and arranging your strings and parallels must be a tricky business. ?
The 3215 has 150v max input but can do 12v/390w and 24v/780w
The 4210 has 100v max input but can do 12v/520w and 24v/1040w
They each have max batt v of 32v, have same load limit of 20a but battery current is 30a and 40a (spec sheet for each in links)
Doesn't that mean the 30 amper can have more total Voc and so more panels, but they have to be smaller to not go over the watts limit?
Seems backwards to me.
