This is new to me. But solar panels are getting so inexpensive that it may be cheaper to replace them. https://interestingengineering.com/innovation/technology-rejuvenate-old-solar-panels?fbclid=IwAR30x1JpCMipqs7cAe2wfCy1EvAMAF2ut_iTMWBB4_cZkKtiNZg6CxJRn18
