Home thermo solar (solar water heating) sometimes breaks (pump...) but a home setup is so simple many owners can repair it themselves, and nearly all can easily find a local serviceman, a competent plumber can tackle most problems.

As for photovoltaic a home system seems very robust to me, even serious hail cannot damage it (some windshields will break under it way before the panels!).

I completely fail to see even a single and most prominent problem.

In a sunny geographical zones there usually are many user, and a is local service offering.