OK—how do they store the energy? [I forgot about that part.]
Furthermore the production of a solar cell is energy intense. Power demanded is often not there during peak usage times and many of those people with this power have plans where they pump the power into the grid but then pull the power when they need it. But guess what’s producing the power when they need it? Coal, gas, or nuclear. Solar works real good, as long as you can fall back on tradition power generation or have a big battery bank behind you're house.
Do you know what a hail storm will do to your $15,000 worth of solar panels on a roof? Minor detail I guess.