Thresher
Active member
Thank you Will. Searching further I found this:The cheap controller will be pulse width modulated type not MPPT as claimed. (possibly) PWM is in effect a simple connection solar pV panel to battery with the ability to interrupt charge when battery seems fully charged. It may have a charging (tapering) profile but in practice with small panle will almost always be running full power.
MPPT has the ability to transform the incoming voltage to that needed to charge the battery. 12v up to 14+ volts vrom what ever it can gleen from the PV panel. ie low light still gets some charge in to battery. Max light can actually produce more current than panel. The best part however is the ability to get max power (current) from a large 40v panel into a 12v battery. So yes Victron MPPT is good. ol'will
Understanding Solar Controllers: MPPT vs. PWM for Your Solar System