California with solar panel

[Paul_f]

My 100w semi-flexible panel has never produced over 30W in bulk mode

I have a 120w panel fixed to a curved ally sheet on the Cali roof and I get similar result 35-40w

The panel OC voltage at midday is 19v whereas the spec says 21.2V

 

[TheKolonel]

A great read. Thanks to all. I have just connected my solar system to the chassis rather than the negative terminal. Bypassing the shunt meant that the readings were never reliable.