You should not consider investing in green energies unless you are ready to spend at least fifteen years in your home. Paying off your solar energy system will take you years and the return on your investment will depend on how long you stay in the same home and keep using the solar energy system.
Make sure that any solar panels you put up are actually cost effective. While the installation cost can be dented with government assistance, you need to know how long it will take for energy savings to return your investment. Also factor in that you are not likely to get the same amount of power every single month.
When using solar energy for the first time, it's probably a good idea to start out small. A small investment of just a few solar powered garden lights is a great way to get started. You can find them at big box and even home improvement stores. They are as easy to install as any other garden light.