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For the solar water heaters, MNRE Subsidy is discontinued with effect from this month.
You need to Check out for power generation also, for any change in the policy.

The first step is to use Energy Efficient Appliances, Investment on Energy efficient Appliances is must, before considering solar energy.

http://www.thealternative.in/lifestyle/ ... er-system/

http://basilenergetics.com/Products.html