Govt offers interest and capital subsidies under Jawaharlal Nehru Solar Mission.

30% cost of project is offered by MNRE as capital subsidy

50% cost of project is supported by MNRE in form of loan at 5% interest rate .

Renewable Energy Certificate(REC) is awarded for each 1000 units generated which
can be traded at 12000 Rs at Indian energy Exchange
A well designed solar photovoltaic system can give returns up to 18% annually.