Solar on a small TT

Almot wrote:

Amps of the string of 3... Don't change? I remember discussing this with the maker of my MPPT controller - back in those ancient times 4 years ago when the US-made electronics still existed. His point was that it depends A LOT what part of the panel is shaded. If this is the end of the panel, i.e. all 3 sub-strings are partially shaded, this creates a bottleneck so bad that MPPT has little to grab on. For the entire panel, and thus for the entire string. Output drops to almost nothing.

When the entire panel is shaded all 3 bypass diodes in that panel conduct and continue to pass the amps of the other 2 panels. So the output is 2/3. ie MPPT receives all of the amps and 2/3 of the voltage.