Solar charging with some shade
I'm facing west today, so I'm getting a pretty good shadow on one of six series-connected panels. Panels are all around 135w @ 12v. Shade is on the far-left panel - about half of it: No...
Forum Discussion
Almost had another glimmer.
You are saying that the 36 cell 135w panel with Vmp of 17.6 and Imp of 7.6 (say) is 36 cells in series with each cell having a Vmp voltage of 17.6/36= 0.49v and an Imp of 7.6?
So if 1/2 shaded (in the right way say 2 columns of 9= 18 shaded) it will be a panel of 18 cells in series having 8.8 volts Vmp but still with Imp of 7.6?
So that 18 cell panel in a string of 36 cell panels, still has the full Imp but lower voltage to add in to the string's total V?
Edit--except when I cover part of a single panel I still get fewer amps than when uncovered.
You are saying that the 36 cell 135w panel with Vmp of 17.6 and Imp of 7.6 (say) is 36 cells in series with each cell having a Vmp voltage of 17.6/36= 0.49v and an Imp of 7.6?
So if 1/2 shaded (in the right way say 2 columns of 9= 18 shaded) it will be a panel of 18 cells in series having 8.8 volts Vmp but still with Imp of 7.6?
So that 18 cell panel in a string of 36 cell panels, still has the full Imp but lower voltage to add in to the string's total V?
Edit--except when I cover part of a single panel I still get fewer amps than when uncovered.
