There is no need to tear apart your roof to use solar energy. You can make small switches like putting in solar powered outside lights. They charge their batteries during the day, switching on and providing illumination all night.
How to make a solar cell easily (the most simple way still affordable a general family). The technology is there for you.
Solar panels are not very easy to install, so you should hire a professional to get the job done. While you will save a bit of money by trying to do it in your own, you do not want things to be less than perfect. Also, you will most likely end up paying someone to come out and fix the mess you made.