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
(ii) Grid Connected Solar Rooftop System.
Categories of grid connectivity levels:
•At HT level (below33kV)
•At LT level (400 Volts-3 phase or 230 Volts-1
The grid connected rooftop system can work on net metering basis wherein the beneficiary pays to the utility on net meter reading basis only. Alternatively two meters can also be installed to major the export and import of power separately. The mechanism based on gross metering at mutually agreed tariff can also be adopted.
In feed-in-tariff the Government offers a tariff for purchase of the solar power generated from such plants.
About 5,000 trillion kWh per year energy is incident over India’s land area with most parts receiving 3-5 kWh per sq. m per day. The potential of solar power in the country has been assessed to be 750 GWp.
• Reduction in transmission losses
• Low gestation time
• No requirement of additional land
• Improvement of tail-end grid voltages