Forum Discussion
CA_Traveler
Apr 03, 2021Explorer III
The typical panel has 1 bypass diode for each string. A 4x9 panel has 2 strings 6x10 has 3 strings. And these diodes are external to the cells and in the wiring box which is close to the junction box. From the diagram above 2 more wires are routed to the junction box for the 3 diodes.
My 60 cell panels have 3 byass dioes or 1 for every 20 cells which is 10V. With 3 panels in series each string has 10V. I've previously posted a graph showing a rising sun with leafy shade on the panels. Charging starts at 20V and jumps by 10V increments as the shade moves off of the panels. My diodes have a 0.3V drop so very small effect.
My 60 cell panels have 3 byass dioes or 1 for every 20 cells which is 10V. With 3 panels in series each string has 10V. I've previously posted a graph showing a rising sun with leafy shade on the panels. Charging starts at 20V and jumps by 10V increments as the shade moves off of the panels. My diodes have a 0.3V drop so very small effect.
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