Ans: In a solar rooftop systems, 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 systems with storage facility using battery.
(ii) Grid Connected Solar Rooftop systems.
Ans: In Grid connected Solar Rooftop PV systems the DC power generated from SPV ( Solar Photo Voltaic) panel is converted to AC power using power conditioning unit .Generated Power by this systems during the day time is utilized fully for powering captive loads and excess power is fed to the Grid. Grid connected Solar Rooftop systems is operational so 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.
i) Electricity generation at the consumption center and hence Savings in transmission and distribution losses
ii) No requirement of additional land
iii)Improvement of tail-end grid voltages and reduction in systems congestion with higher self-consumption of solar electricity
iv) Local employment generation.
Ans: It is required that Rooftop Solar Power Plant systems should be located in the premises of the consumer." Premises" means rooftops or /and elevated areas on the land ,building or infrastructure or part or combination thereof in respect of which a separate meter or metering arrangements have been made by the utility for supply of electricity.
Ans: “Net Meter” means an energy meter as defined in the Electricity Supply Code which is also capable of recording both the import and export of electricity, or a pair of energy meters, one for recording the import and the other for recording the export of electricity.
Ans: “Net Metering Arrangement” means an arrangement under which a Roof-top Solar PV systems with Net Meter installed at an Eligible Consumer’s premises delivers surplus electricity, if any, to the Distribution Licensee after setting off the quantum of electricity supplied by such Licensee during the applicable Billing Period.
Ans: In case of electricity injected in the Grid exceeds the electricity consumed by the consumer in the billing period ( Monthly electricity bill ) ,such excess injected electricity shall be carried forward to the next billing period as electricity credit and may be utilised to net electricity injected or consumed in future billing periods but within the settlement period (-from 1st of April in an English calendar year and ending with the 31st of the March of next year ) .At the end of settlement period any electricity credits ,which remain unadjusted ,shall be paid at average cost of power purchase as approval by MERC for that year.
Ans: Department of Financial services has instructed to all Public Sector Banks to encourage home loan/ home improvement loan seekers to install rooftop solar PV plants and include cost of systems in their home loan proposals. So far, nine PSBs namely Bank of India, Syndicate Bank, State Bank of India, Dena Bank , Central Bank of India, Punjab National Bank, Allahabad Bank, Indian Bank and Indian Overseas Bank have given instructions to extend loan for Grid Interactive Rooftop Solar PV Plants as home loan/ home improvement loan.
Ans: In case the grid fails, the solar power has to be fully utilized or stopped immediately feeding to the grid so as to safe-guard any grid person/technician from getting shock (electrocuted) while working on the grid for maintenance etc. This feature is termed as ‘Islanding Protection’.