Try this, go to Google with the manufacturer and make of your solar controller, and see if you can find a place to buy the part(s). Then it should be a relatively simple remove and replace. YouTube may have some instructions on how to do the work. If this does NOT involve warranty or roof work, I can probably you a hand. I do not do roof work.
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Pennsylvania, for 60+ years, most recently, Allentown, now TV. 
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