Solar energy projects of capacity of 10,604 MW were installed in the country under the Phase-II of National Solar Mission (NSM) from April, 2013 to March, 2017. As the cost of the storage systems are very high at present, all the grid connected solar power projects supply directly to the grid.

Solar power projects usually operate for six to eight hours a day depending upon sun-shine hours. Generation of electricity depends upon the intensity of solar radiation falling on the solar photovoltaic panels. Incorporation of energy storage system with the power plant is an add on capital expenditure on the solar power plant, which affects the cost of generation, depending upon the capacity of the storage system incorporated.

At present cost of storage is high. Therefore, depending upon ratio of storage capacity and solar project capacity, the viability is affected. The viability of storage system also depends upon its application. For applications, such as frequency regulation, ramping up and down of power production etc., wherein the storage capacity is significantly less than the solar power capacity, storage is more viable because it has relatively significant impact in grid management. Storage for load shifting or to store the excess generated power for use at later stage may not remain financially viable, though it may have social impact.

  • State wise details of grid connected solar capacity installed during Phase-II of NSM
  • Details of solar power tariffs in Rs./kWh during 2015 to 2017