There’s really less to go wrong with your solar power system than your television or radio. There’s a 30 year warranty on the whole system. Over that 30 year period, you’ll replace the inverter once at a cost of about $500. That’s it. Most areas get enough rain to rinse off dust or debris on the panels. There are no moving parts. The whole system is simply moving electrons through wires– flowing electricity. Anybody who tries to tell you maintenance on a solar panel is a big headache, is probably looking to pick your pocket somehow.