Calling on Solar Techies
I have been thinking of going solar for some time and decided to pull the plug. My wants are a 400 to 500 watt system. I have four 12 volt batteries with 340ah. I am not planning on changing b...
Forum Discussion
StirCrazy wrote:
I tdhink people need to learn more about MPPT chargers before they recomend against them..... yes they benifit more during bulk charging, no they do not switch to PWM mode, they are a three stage MPPT charger so basicly a DC_DC charger that converts DC to AC then back to DC at the most efficent combination ov voltage vs current.
"Re: MPPT vs PWM controllers?
MPPT - you only gain it's wattage conversion efficency while it is in BULK mode, once the controller eases off when switching to Absorb, all the ones I know of, revert to PWM mode for absorb and float.
Mike that is the very point that I find is hardest to get across to everyone.And its the very reason you dont get 50% and above gains from them as most people claim.On another similar site a well know poster talked about |the mysteries of MPPTversus PWM" He never ever mentions that fact only give figures to show theory gains.
You are also correct with "all the ones I know of, revert to PWM mode for absorb and floatOt of dozens I regularly test have never found one not to be like that."
https://forum.solar-electric.com/discussion/13231/mppt-vs-pwm-controllers #25
