The Central government is likely to make it mandatory for buildings to install solar rooftop systems. The proposal is among the initiatives planned by the Government of India to support the massive solar capacity addition target (100 GW by 2022).
An official statement has indicated that there would be a proposal for amendment in building norms for mandatory provision of solar rooftop systems for new construction and 10% renewable energy provision for end-customers under the new scheme of Ministry of Urban Development.
Generally, about 10 sq.m area is required to set up 1 kWp grid-connected solar rooftop system. The average cost of such system is around Rs.80 per watt. This is still a proposal which may or may not become a policy.
Mandatory solar rooftop systems are not new. Similar policies have earlier been formulated by the states of Haryana and Tamil Nadu. Haryana also made it mandatory for all buildings with an area of 500 sq. yards or more to install solar rooftop systems of a minimum size of 1 kW or 5% of their power requirements, whichever is higher. The deadline for meeting the requirements is September 2015.
In all likelihood, there will be large-scale non-compliance to this mandate. The primary reason for non-compliance is that other aspects of the policy are not being effectively implemented. Central and state government subsidies have been announced but they are not available. Net-metering exists on paper but the process for providing inter-connection has not yet been streamlined. In fact, hardly any permission has been provided for net-metering.