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Green Renewable Energy Forum
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Solar Panel Issue - Maybe Faulty Diode?
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<blockquote data-quote="binky" data-source="post: 356522" data-attributes="member: 490"><p>Diodes are there to stop backwards flow in the panels, and allow a panel to be by-passed should it be shaded, or defective. The won't affect the panel outputs. 12.5A sounds pretty reasonable for your panels which output around 4.5A max. If you think a panel is defective, then disconnect one at a time. Or check them with a simple multimeter that can test DC voltages. Disconnect panels from system, point roughly at sun, and test for DC voltage at panel connectors. You'll have to keep an eye for clouds, but basically all 4 panels should give the same voltage output. To check ampage, you will need a 'clamp ammeter'. Join ends of panel connectors together, place clamp around cable to take a reading of ISCC. Compare all 4 to get an idea if one is faulty. ISCC (short circuit ampage) for these panels is around 5.1A</p></blockquote><p></p>
[QUOTE="binky, post: 356522, member: 490"] Diodes are there to stop backwards flow in the panels, and allow a panel to be by-passed should it be shaded, or defective. The won't affect the panel outputs. 12.5A sounds pretty reasonable for your panels which output around 4.5A max. If you think a panel is defective, then disconnect one at a time. Or check them with a simple multimeter that can test DC voltages. Disconnect panels from system, point roughly at sun, and test for DC voltage at panel connectors. You'll have to keep an eye for clouds, but basically all 4 panels should give the same voltage output. To check ampage, you will need a 'clamp ammeter'. Join ends of panel connectors together, place clamp around cable to take a reading of ISCC. Compare all 4 to get an idea if one is faulty. ISCC (short circuit ampage) for these panels is around 5.1A [/QUOTE]
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Solar Panel Issue - Maybe Faulty Diode?
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