Solar panel shading
With 1,280 watts of solar I don't worry to much about getting enough solar. This time of the year with the days getting shorter and we're in the national forest boondocking catching light shadows fro...
Forum Discussion
CA Traveler:
The math in your example is incorrect:
Theoretical output of panels in series hook-up with no shade
8A*(30V+30V+30V)=720W
Theoretical output of panels in parallel hook-up with no shade:
(8A+8A+8A)*30V=720W
Output from panels in series with one panel in shade:
8A*30V+8A*30V-8A*1.8V=465.6W
Output from panels in parallel with one panel in shade:
8A*30V+8A*30V+0A*0V=480W
Your analysis would work if there were 9 resistors in series. Instead there are 9 CURRENT sources in series. Not the same thing.
Assuming partial shade of one panel,the output would be:
Panels in series-anyone's guess
Panels in parallel-at least 480 watts
The math in your example is incorrect:
Theoretical output of panels in series hook-up with no shade
8A*(30V+30V+30V)=720W
Theoretical output of panels in parallel hook-up with no shade:
(8A+8A+8A)*30V=720W
Output from panels in series with one panel in shade:
8A*30V+8A*30V-8A*1.8V=465.6W
Output from panels in parallel with one panel in shade:
8A*30V+8A*30V+0A*0V=480W
Your analysis would work if there were 9 resistors in series. Instead there are 9 CURRENT sources in series. Not the same thing.
Assuming partial shade of one panel,the output would be:
Panels in series-anyone's guess
Panels in parallel-at least 480 watts
