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.
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.You can see the world's smartest battery here
3. 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.
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.
5. What is the average cost of grid connected rooftop solar systems?
To find out your system cost
6. What are the other fiscal incentives are available for Solar Rooftop Systems?
There are provisions of concessional import duty/excise duty exemption, accelerated depreciation and tax holiday for setting up of grid connected rooftop power plants.
7. What efforts Government is making to providing loans for solar rooftop systems?
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 system 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.
8. What is the size of grid connected rooftop solar system?
The rooftop solar systems from 1 kWp up to 500 kWp or in combination can be set up on the roofs.
To know your exact system size
9. 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
10. 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. 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.
11. What is the potential available in India?
According to a study conducted by TERI, a potential of 124 GWp SPV Rooftop plants has been estimated in the country. This can be achieved through active supports from the States.
12. In case of grid failure, is there any chance for shocks to the person who is repairing?
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’.
13. What are the business models that can facilitate the promotion of grid connected rooftop solar systems?
There can be many possible business models, some of which can be considered are as follows:
- Solar installations owned by consumer
- Solar Rooftop facility owned, operated and maintained by the consumer(s).
- Solar Rooftop facility owned by consumer but operated and maintained by the 3rd party.
- Solar installations owned, operated and maintained by 3rd Party If the 3rd party implements the solar facility and provides services to the consumers, combinations could be:
- Arrangement as a captive generating plant for the roof owners The 3rd party implements the facility at the roof or within the premise of the consumers; the consumer may or may not invest as equity in the facility as mutually agreed between them. The power is then sold to the roof owner.
- Solar Lease Model, Sale to Grid The 3rd party implementing the solar facility shall enter into a lease agreement with the consumer for medium to long term basis on rent. The facility is entirely owned by the 3rd party and consumer is not required to make any investment in facility. The power generated is fed into the grid and the roof top owner gets a rent.
- Solar Installations Owned by the Utility
- Solar installations owned operated and maintained by the DISCOM The DISCOM may own, operate and maintain the solar facility and also may opt to sub contract the operation and maintenance activity. The DISCOM may recover the cost in the form of suitable tariff. The electricity generation may also be utilized by DISCOM for fulfilling the solar renewable purchase obligation.
- Distribution licensee provides appropriate viability gap funds The DISCOM may appoint a 3rd party to implement the solar facilities on its behalf and provide appropriate funds or viability gap funds for implementing such facility.
14. How much area is required for a 1 kW rooftop Solar PV system?
A 1 kW rooftop system generally requires 12 sq. meters (130 square feet) of flat, shadow-free area (preferably south-facing). Actual sizing, however, depends also on local factors of solar radiation and weather conditions and shape of the roof. To know the exact area required for your system
15. What are the models for implementation of Rooftop PV systems by SECI?
Currently, SECI implements the rooftop scheme under two models: c) CAPEX Model: Here, the entire system is owned by the rooftop owners. Responsibility of O&M for the system lifetime (25 years) is also with the rooftop owner. Developer is responsible for installing the system and initial 2 years O&M. In this case, the developers are selected through a system cost-based reverse bidding. Selected bidders are offered 30% subsidy on the system cost (exclusive of taxes). d) RESCO Model: Here, the entire system is owned by the developer. Responsibility of O&M for the system lifetime (25 years) is also with the developer. Rooftop owners may consume the electricity generated, for which they have to pay a pre-decided tariff on a monthly basis. Excess generation may be exported to the grid, subject to availability of requisite state regulations. In this case, the developers are selected through a tariff-based reverse bidding (in phase IV).
16. What are the environmental impacts & benefits of solar energy?
Power your home with clean energy.
Solar power systems derive clean, pure energy from the sun. Installing solar panels on your home helps combat greenhouse gas emissions and reduces our collective dependence on fossil fuel.
Traditional electricity is sourced from fossil fuels such as coal and natural gas. When fossil fuels are burned to create energy, they emit toxic gases that are the primary cause of pollution and global warming.
Not only are fossil fuels bad for the environment, they're a finite resource. Limited availability creates a volatile market in which energy prices can skyrocket in a short period of time.
Big environmental impact.
17. How much does solar energy cost?
Thanks to innovations in financing, manufacturing and technology, it's now easier and more affordable to go solar. No matter which option you decide is best for you, the result will be the same: clean energy for your home and more money in your pocket for the things you really care about.
18. How will solar panels look on my roof?
Sleeker panels. Faster installation. Our team is constantly pushing the boundaries on design, with mounting that almost seamlessly fits panels to your roof. Our proprietary mounting technology uses fewer contact points, significantly reducing installation time. In a word: fabulous. Our modern, low-profile design and premium front trim integrate elegantly into your roof. It’s a look that never goes out of style.
19. How does solar power work? How does sunshine become electricity?
Photovoltaic (PV) cells convert sunlight to direct current (DC) electricity. The inverter converts DC into alternating current (AC) electricity. The electrical panel sends power to your lights and appliances. The utility meter measures the energy you draw and feed back to the grid.
20. Help power the neighborhood!
If you generate more solar energy than you’re consuming, it gets fed back to the grid and distributed elsewhere. Think about it, your solar energy could be helping power a school, hospital or your next-door neighbor.
21. What maintenance is required?
Your solar system requires almost zero maintenance, largely because it has no moving parts. All your system requires is a cleaning with a cloth to remove all the dust accumulated every 7 to 10 days.
22. How reliable is solar power?
Solar systems built today are very reliable. They have proven to be dependable sources of energy for large office buildings, mass retailers and governmental agencies, supplying megawatts of energy. Some of the largest companies in the world have buildings powered by solar energy.
23. How long do PV systems last?
A well-designed and maintained PV system will operate for more than 25 years and has an expected lifetime exceeding 30 years. Experience shows most system problems occur because of poor installation, failed connections, insufficient wire size, etc. The Balance of Systems (BOS) - the controller, inverter, and protection components come with a standard warranty up to 10 years, however if well maintained and timely inspected can last for the entire 25 year period.