India has started off with Gujarat allowing people to install solar PV in their roof tops.

Now you can contribute to renewable source of energy and also get tax benefits upto certain extent.

Basic Process:

1) Install PV on your roof tops.

2) Use the Generated power of your PV  For operating T.V. , LIGHTS, FANS.

3) Sell the power to main grid if excess. For Eg. in Summer.

4) Use the power of grid if its less.

Here is basic information about it.