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
Hi BFL13,
volts x amps = watts
380 watts max @ 12 volt out for the 30 amp
480 watts max @ 12 volt out for the 40 amp
Input voltage is independent of power out (so long as it is below 30 and 40, respectively) and only indicates a limitation of the controller's input parameters.
You could feed the 30 amp 150 volts @ 2.4 amps; or 100 volts at 3.8 amps. The wattage going into the controller remains the same in both cases.
The higher the input voltage the more of the energy will be wasted as heat inside the controller--so it still behooves one to use lower voltages unless you wish to save on the cost of #4 wire to the controller from the roof.
volts x amps = watts
380 watts max @ 12 volt out for the 30 amp
480 watts max @ 12 volt out for the 40 amp
Input voltage is independent of power out (so long as it is below 30 and 40, respectively) and only indicates a limitation of the controller's input parameters.
You could feed the 30 amp 150 volts @ 2.4 amps; or 100 volts at 3.8 amps. The wattage going into the controller remains the same in both cases.
The higher the input voltage the more of the energy will be wasted as heat inside the controller--so it still behooves one to use lower voltages unless you wish to save on the cost of #4 wire to the controller from the roof.
BFL13 wrote:
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.
