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...
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What is hard to get is the efficiency curves of the MPPT controller at various voltages (I think Morningstar publishes theirs) which has a big impact on real world gained amps into the batteries.
The other thing which is hard to get info on is how a particular unit's MPPT actually does the tracking. From info available Rogue and MorningStar look decent (probably both a little slower than I would like to chase Vmpp in fast moving clouds but might actually work quite well), but it is possible to implement MPPT that yields only the battery amps that PWM would in some conditions, or even yield less than PWM (say some panels in building shade and the controller trapped optimizing the wrong voltage peak or, fast moving clouds in a mixed panel system, after a Vmpp setting of high voltage and no ability to follow the voltage down to the other lower max peak).
Jim
The other thing which is hard to get info on is how a particular unit's MPPT actually does the tracking. From info available Rogue and MorningStar look decent (probably both a little slower than I would like to chase Vmpp in fast moving clouds but might actually work quite well), but it is possible to implement MPPT that yields only the battery amps that PWM would in some conditions, or even yield less than PWM (say some panels in building shade and the controller trapped optimizing the wrong voltage peak or, fast moving clouds in a mixed panel system, after a Vmpp setting of high voltage and no ability to follow the voltage down to the other lower max peak).
Jim
