Are any MPPT controllers buck+boost?
Apparently some MPPT controllers can boost voltage up when Vmpp is near or below Vbatt. Or do you just wire the panels serial-parallel to ensure the voltage is always above Vbatt is Vmpp can get close...
Forum Discussion
A watt is a watt is a watt. A MPPT controller cannot induce perpetual motion. Because the operation of MPPT is a bit esoteric methinks a lot of hype has found fertile ground to sprout.
IMHO the MAIN advantage of MPPT is it's ability to deliver maximum watts potential over long distance using significantly smaller conductors.
When someone delivers "The Goods (also referred to as proof)" with overlay charts and graphs showing WATTS delivered to the battery by the controller then the situation should become a lot more clear.
Same system, wire sized for PWM, establish a kWh graph, then overlay the performance of a MPPT. I'm not talking about comparing a 48 volt panel with wire sized for 12 volt operation to a 12-volt panel with perhaps 20voc.
When a 20 volt panel is showing a working 16 working volts potential, and the battery bank is at 12.2, then something's not right.
IMHO the MAIN advantage of MPPT is it's ability to deliver maximum watts potential over long distance using significantly smaller conductors.
When someone delivers "The Goods (also referred to as proof)" with overlay charts and graphs showing WATTS delivered to the battery by the controller then the situation should become a lot more clear.
Same system, wire sized for PWM, establish a kWh graph, then overlay the performance of a MPPT. I'm not talking about comparing a 48 volt panel with wire sized for 12 volt operation to a 12-volt panel with perhaps 20voc.
When a 20 volt panel is showing a working 16 working volts potential, and the battery bank is at 12.2, then something's not right.
