FAQ

01. What is solar energy?

It uses sun’s rays to generate heat or electricity. It is an infinitely renewable resource and can generate energy in clean & consistent manner

02. How do solar photovoltaic cells work?

In simple terms, photovoltaic cells are comprised of a semiconductor material such as silicon. There are few other elements which are added like phosphorous and boron which create conductivity within the cell and energize electrons. The movement of electrons across the cell (when activated by the sunlight) creates electricity.

03. What’s the difference between solar power and solar heating system?

Both types of systems uses energy from the sun, solar power systems use photovoltaic panels (commonly) to produce electricity. Solar heating system (hot water or thermal), uses sunlight to heat water for domestic/commercial use e.g.: to heat a swimming pool or solar water heaters

04. How much maintenance do solar energy panels require?

Solar photovoltaic panels require very little maintenance (require cleaning at times). It is, however, important to place panels where they will remain clear of shade and cover (in the form of dust). Solar hot water collection arrays don’t need much attention either but periodically cleraning does help.

05. Can I use a financing system?

Yes. Contact us, we will evaluate your case and help you get finance for your project.

06. Will I need some kind of permit or approval to install solar energy system in my premises?

Yes and No. If you want to install grid-connected system, you will need to apply for net-metering connection with your local electricity department. But if you are looking for off-grid setup, probably you won't need any approval

07. 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.

08. 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

09. What is a Grid Connected Solar Rooftop System?

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.

10. 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.

11. How much roof area is required to set up the grid connected rooftop solar system?

About 10sq.m area is required to set up 1 kWp grid connected rooftop solar system.

12. What is the Financial Assistance provided by the Ministry?

There is a provision of Central Financial Assistance of 15% of the total cost or Rs. 12 per watt under the Grid Connected Rooftop and Small Solar Plants Programme of the Ministry. This CFA has been reduced from 30% to 15%. For latest updates please check with MNRE

13. What are the advantages of Grid-Connected Rooftop Solar System?

• Electricity generation at the consumption center and hence Savings in transmission and distribution losses
• Low gestation time
• No requirement of additional land
• Improvement of tail-end grid voltages and reduction in system congestion with higher self-consumption of solar electricity
• Local employment generation

14. What is Net metering ?

The grid connected rooftop system can work on net metering basis wherein the beneficiary pays to the utility on net meter reading basis only (i.e. power consumed - power produced). 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.