FAQ - Frequently Asked Questions


Q: What is solar energy?

A: Solar energy takes advantage of the sun’s rays to generate heat or electricity. It is an infinitely renewable resource and unique for its ability to generate energy in a quiet, clean, and consistent manner.


Q: What is a photovoltaic (PV) system?

A: PV technology produces electricity directly from electrons freed by the interaction of sunlight with a solar panel made of semiconductor material. The power provided is direct current (DC) electricity. The basic building block is known as a Solar cell. Many cells put together are known as a module, and many modules assembled together form an array. A PV system will consist of an array of modules generating DC electricity, an inverter and can be stored in battery storage banks.


Q: What are the components of a photovoltaic (PV) system?

A: A PV system is made up of different components. These include PV modules (groups of PV cells), which are commonly called PV panels; one or more batteries; a charge regulator or controller for a stand-alone system; an inverter for a utility- grid-connected system when alternating current (ac) rather than direct current (dc) is required; wiring; and mounting hardware or a framework.


Q: What is a "grid-tied" PV system?

A: Connecting solar system directly into the utility Grid. (Local Electricity Company grid).


Q: What's the benefit of installing Solar systems for New Building?

A: It is much easier and less expensive to install solar panels when you build a new house or new building. Not only can you save money on additional wiring, but also you do not have to deal with re-planning or re-construction works. Nevertheless, it is a good idea to consider all pros and cons of different types of solar powered systems.

Q: What is a net meter?

A: Net-meter (bi-directional meter) is having provision to record energy imported from the grid to meet the load and energy exported to the grid after self- consumption. Both energy import and export records in the net-meter. The difference between Export and Import readings is the actual energy consumed/delivered. 
The net meter records surplus energy exported to Local Electricity company grid. When your system generates less energy than your consuming load, the meter records energy imported from Local Electricity Company grid.

Q: What are the different types of rooftop solar PV systems?

A: Different types of rooftop solar PV systems are :

  • Grid Connected - These systems have no storage other than the grid itself.Any excess electricity generated from solar system is fed back into the grid. At night or during times of intense cloud cover, the installation draws power from the grid.
  • Hybrid (Grid tied with Storage) - These systems are grid connected, but also have some storage capacity by way of a small battery bank. They provide some measure of continuity when the grid goes down at the same time, as there is not sufficient solar input.
  • Off-grid - These systems are suited to remote locations where a grid connection is not available/when there will be no continuous power supply in the grid. The battery bank is sized to provide a certain number of days of storage in the installation and the installation draw power from the storage batteries during the night or during days of intense cloud cover.

Q: Can I use Solar PV system to power my home or Office?

A: Solar PV system can be used to power your entire home's or Office electrical systems, including lights, cooling systems, and appliances.


Q: What guarantees will I receive?

A: The SRTPV Panels will be normally having 25 years of guaranteed life and Inverter with a guaranteed period of 5 years and same is to be guaranteed by installing agencies.


Q: How much space on my roof do I need for a solar PV installation?

A: The grid connected SRTPV system of 1 kW peak power capacity requires about 100 sq. ft. shadow free area on the rooftop.


Q: How much electricity does a PV system generates?

A: For every kW peak SRTPV system installed on a South facing roof, the system will generate 4 to 5 units per day. However, the energy generation depends upon the weather conditions and reduces by around 20% for an East or West facing roof.


Q: Whether all consumers are eligible to install solar rooftop systems to avail net metering facility?

A: Yes. All registered metered consumers coming under the jurisdiction of Local Electricity Board area are eligible for installation of solar RTPV system.


Q: Do I need plan permission from the Local Authorities?

A: Not required, In case the height of the building is below the permissible limit of local authority.


Q: How much time will it take to give permission from Local Electricity Board?

A: Subject to feasibility, permission will be issued normally within 7 working days from the date of registration of application.


Q: How the billing and payments are made?

A: The consumer shall receive monthly a net import/export bill indicating either net export to the grid or net import from the grid.
In case of net import bill, the consumer shall settle the same as per existing norms. If it is a net export bill (after self-consumption),net credit amount payable will be deposited by Local Electricity Board into consumer’s bank account, provided by consumer at the stage of submission of application.