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
I am not clear on how the Imp can be the same as the " array panel amps" that are affected by having one panel shaded so the other panels are down to the same amps as the shaded one. Where does it say that amps amount is the same as Imp?
The voltages in series add up panel by panel including the voltage of the shaded panel to get "array voltage." There is an "array wattage" based on that total voltage and the lowest panel amps ( I imagine )
But then the controller jumps in and sets an "array voltage" by using a chosen Vmp.
The total array voltage before that happened is not???? the same as the chosen Vmp ???? so why should the "input wattage" be the same, and if not the same, this would mean the "wattage" divided by the chosen Vmp would give you a different amps amount as Imp than the lowest amps on any of the panels in the string--- or might even be the same by coincidence?
I am confused as you can tell :)
The voltages in series add up panel by panel including the voltage of the shaded panel to get "array voltage." There is an "array wattage" based on that total voltage and the lowest panel amps ( I imagine )
But then the controller jumps in and sets an "array voltage" by using a chosen Vmp.
The total array voltage before that happened is not???? the same as the chosen Vmp ???? so why should the "input wattage" be the same, and if not the same, this would mean the "wattage" divided by the chosen Vmp would give you a different amps amount as Imp than the lowest amps on any of the panels in the string--- or might even be the same by coincidence?
I am confused as you can tell :)
