Solar panels are very hardy.
Compared to alternative power sources, they wear out very slowly. Their effectiveness decreases around 1 to 2 percent a year. Solar flares, which are unpredictable severe bouts of radiation that can damage the electronics inside the panels. Micrometeorites, which are tiny, gravel-sized bits of rock and other space junk floating in space can scratch or crack solar panels. The solar concentrator as well as a thick layer of glass protect the solar panels from these.