My father is building a home, rather large at over 4000 sq/ft. He has looked into using solar and, after doing the math, has decided that over a 20 year span his $30-40K could be invested in other low risk areas for a better overall return.
Prices have dropped a bit since he did his calculations. This was maybe 2 years ago. His concerns were the life of the system, the performance degradation over the years and eventual panel replacement, and the relatively small increase of the home's value should he decide to sell someday.
Going "green" is another reason to go solar, of course, but are the financial gains really worth it yet?
Also, if people are paying less to the power companies for energy, how will these companies compensate for that? I would guess one way would be for them to credit people less for the energy they are creating, assuming all systems are on the grid.
Perhaps this is the wrong thread to bring this up. If so, please don't allow me to derail it.