[villagetinker]

Originally Posted by Bay Kid

This for the home, not a pool. My son-in-law is considering because his electric bill is over $500. per month (pool, kids and lots of house). Located in Va. Got his 1st quote around $56,000. Placed on a metal roof. Seems like very high, but they told him it will pay for itself in 6 years.

I have no idea of the economics associated with a solar electric installation in Virginia, however, I would never rely on the word of the installer about the payback time, they have a vested interest in selling the system. IMHO, 6 years seems too short, but this is highly dependent on the rate the local utility will pay (or credit) the electricity generated by the system.
As noted previously there were several threads on this topic before with several excellent comments about all of the costs and financial considerations for this type of project. I would suggest an internet search on the subject and find an impartial source for info. If you son has a financial advisor they may be able to help with the financial considerations.
There are lots of considerations so please have your son do a complete investigation, also many electric utilities will have customer service people that will provide advice on what needs to be considered or may have a website with info. The state PUC should also have information.
Good luck with your sons project.