Just witnessed MPPT voltage drop below 14V
Well this is interesting. Half sunny half cloudy day, 92 degrees out. Collected this data looking at the turnigy for the maximum panel output (not max amps to battery which was fun but not any real ob...
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I think if you use all identical photovoltaics mounted facing the same direction it may well be. But picture a mix of panels or mounting angles (say one east and one west), and/ or panels with different IV curves. Or even shade, where one panel is all the way in building shade, another is partial, another full sun. I believe there are multiple local maxes in that case. Mine would have at least a max around 14v and a second one near 16.5v, and possibly a third max for the partial shade unit depending on how the shade hit it.
The guys who race solar cars have published some interesting approaches to running MPPT in them.
Jim
The guys who race solar cars have published some interesting approaches to running MPPT in them.
Jim
