Greetings experts and fellow novices. Question is how to identify replacement diodes for Mitsubishi 110w 12v panels. I "had" Five panels in parallel for an off grid 12v system. Xantrex C40 charge controller and two Xantrex DR2412 inverters for 220vac. Storage is five 12v AGM deep cycle RV / Marine batteries. I say "HAD" because Zeus and his lightning bolt took out one inverter, the charge controller and three of the five panels... I've replaced the entire system (except batteries) with new and current components but this morning it hit me.... Can I repair the three panels and add them to the new system? New system also 12v.
I dug out the potting material in one of the panel junction boxes and sure enough, one of the two diodes inside it is destroyed. The bad diode is shorted no matter the panel in light or covered. Removing the diode changed the output of the panel about 15v in the shade of the covered porch with no load connected.
NOTE: Before doing anything to the panel in full sun it supplied about 3v while the two good panels provide 17v +-.
These panels have 36 cells, and two diodes. Any idea what specific diodes these are? Since the panels are installed in an area where there is no opportunity for shade, do I even need the diodes? If they are not needed, do I simply un-solder and remove them leaving an open circuit or do I replace them with a wire "short"?
Thanks in advance,
John,
East Alabama
I dug out the potting material in one of the panel junction boxes and sure enough, one of the two diodes inside it is destroyed. The bad diode is shorted no matter the panel in light or covered. Removing the diode changed the output of the panel about 15v in the shade of the covered porch with no load connected.
NOTE: Before doing anything to the panel in full sun it supplied about 3v while the two good panels provide 17v +-.
These panels have 36 cells, and two diodes. Any idea what specific diodes these are? Since the panels are installed in an area where there is no opportunity for shade, do I even need the diodes? If they are not needed, do I simply un-solder and remove them leaving an open circuit or do I replace them with a wire "short"?
Thanks in advance,
John,
East Alabama
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