Well, just examined a 3 year old system and discovered out of 3 strings of 11 panels, a damaged panel in each string. Homeowner admits they had a lightning strike. Two panels are showing a Voc of just 25V (instead of 35V like the rest) and one panel is showing good voltage but only 2.5Asc. None of the fuses in the DC combiner were affected and the (good 'ol) SMA inverter survived just fine. The two strings with low voltage were putting out zero amps due to being tied to the one string with higher voltage.
Question is: Do I need to pull the whole array apart and individually test each panel to make sure there is no other damage? Will have to replace these 3 panels of course, but could there be more?
Question is: Do I need to pull the whole array apart and individually test each panel to make sure there is no other damage? Will have to replace these 3 panels of course, but could there be more?
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