Possibility in Renewable Sources of Energy

Hi All, With the need of the hour being increasing energy needs can we look into starting something related to generating power from renewable sources of energy and powering up some small number of houses just to start with. Suggestions are welcome please as the most economic modes of renewable sources. I have done some research and it seems that IREDA does provide support if we are able to do our homework and come up with a viable business plan. What you think members ?