Consider a solar powered attic fan if you are not ready to make the full switch to solar energy. This type of fan features sensors that can turn on the fan at a certain temperature. This will remove heat and lower the cost of cooling. A good solar powered attic fan will help cool your house and not cost anything to run.
Edison nickel cadmium solar power batteries.The cheapest solar batteries you can buy and will live for 50 years or more.
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.