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  • Q. 1. What is a Solar Rooftop System?

    In a solar rooftop system, the solar panels are installed in the roof of any residential, commercial, institutional and industrial buildings. This can be of two types (i) Solar Rooftop System with storage facility using battery, and (ii) Grid Connected Solar Rooftop System. 
  • Q. 2. What is a Solar Rooftop System with Storage facility?

    Such rooftop system has battery as storage facility. The solar electricity is stored in the battery and can be utilized during night also when the sun is not available.
  • Q. 3. What is a Grid Connected Solar Rooftop System & How it Works?

    In grid connected rooftop or small SPV system, the DC power generated from SPV panel is converted to AC power using power conditioning unit and is fed to the grid either of 33 kV/11 kV three phase lines or of 440/220 Volt three/single phase line depending on the capacity of the system installed at institution/commercial establishment or residential complex and the regulatory framework specified for respective States. 

    These systems generate power during the day time which is utilized fully by powering captive loads and feed excess power to the grid as long as grid is available. In case, where solar power is not sufficient due to cloud cover etc., the captive loads are served by drawing power from the grid.

    Generally there will be 3 Different cases as follows:


  • Q. 4. Where such plants can be installed?

    Such rooftop systems can be installed at the roofs of residential and commercial complex, housing societies, community centers, government organizations, private institutions etc.
  • Q. 5. What is the average cost of grid connected rooftop solar systems?

    The cost of grid connected rooftop solar systems is Rs. 68,000 per kWp.
  • Q. 6. What is the present Subsidy provided by the Ministry?

    Presently it is 30% from MNRE. It may reduce to 15% anytime. 
  • Q. 7. What are the other Benefits / Incentives are available for Solar Rooftop Systems?

    Accelerated Depreciation of 40% per Annum for Commercial Systems and tax holiday for setting up of grid connected rooftop power plants.