Usually the return on investment time frame on a home solar power installation is approx 3 years. The only way you can get a faster return on investment time frame is if your local government has a solar power rebate given to you, and this can sometimes get your return on investment cut by half. I know there have been some great government rebates on solar the past 10 years, but they are starting to cut them back down. Also, its not only the
solar cells
cost that is the trouble, its also the installation of the system and all the other components such as the inverters, wiring, and the labor to hire a certified electrician. But as the costs are coming down every year, its always looking good.