Most wildly over pay for their solar systems, Solar works great for stand alone systems like my well or a small cabin with limited electricity use, but a whole house operation is a different ball game altogether.
I was told after the solar panels are installed on roofs; the contractors move on to the next job, and there is no one to maintain them.
My 2,300 sq ft all-electric home has 80% of the power provided by solar (on average 20% of my power has to be bought from the grid, most of that in the winter). That includes charging my EV for 16K miles per year (not counting the miles charged on the road during trips). Assuming a reasonable 3% inflation rate in energy costs that I'm avoiding, my entire energy project pays for itself on the 11th year. And that's without selling power to the grid (which I've been doing only 2 months, but don't count it as a given because state regulations might change and I decide to turn the grid sell feature back off).
Admittedly that's only for people in a situation that's good for solar (in the south where we get lots of sun, I spent some money making my house more energy efficient, I drive enough miles for the EV to be worth it, etc.). But I'm an exception where solar is good for a whole house operation.