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...
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I think they are pretty much locked into their long thin form factor. They
Aim ate them into. Weather seled sandwich from the factory.
I have been getting by using a manually adjustable DC-DC converter to measure max power point which works, but most controllers can't really follow the max power point as well as the manual method if Vmpp jumps around too quickly. Seems like a decent strategy with no local shading is to just scan the voltage range, find the global max, then track it as it moves around with some local hill climbing. But there are situations such as shading of one or more panels where the system max drops down to just a local max and hill climbing is trapped trying to find the top of the wrong hill.
Jim
Aim ate them into. Weather seled sandwich from the factory.
I have been getting by using a manually adjustable DC-DC converter to measure max power point which works, but most controllers can't really follow the max power point as well as the manual method if Vmpp jumps around too quickly. Seems like a decent strategy with no local shading is to just scan the voltage range, find the global max, then track it as it moves around with some local hill climbing. But there are situations such as shading of one or more panels where the system max drops down to just a local max and hill climbing is trapped trying to find the top of the wrong hill.
Jim
