Some common questions people ask

The average cost of a grid connected solar rooftop system is approx. Rs 60,000/KWp, upto 10KWp. For more than 10 KWp, it will be lower and if the size goes above 100 KWp it will be as low as rs 48,000/KWp.
Each KW requires about 10 Sq Mts. (100 Sq Ft) of shadow free space. So you can calculate, how much can you install.
In a solar rooftop system, the solar panels are installed on the roof of any residential, commercial, institutional and industrial buildings.
It will take about 6-12 weeks depending on size of the plant. Less than 10 KW systems will be installed within 6 weeks.
Height will be around 3 ft. In case elevated structure is required, the same can be provided for a marginal increase in cost. We have executed many projects with elevated structures. Also, we have installed on tin shed/asbestos sheet/RCC roof.
  • Smart Roof provides end-to-end services to design the most suitable and optimal solar solution for your roof. It specializes in sizing, designing and implementing the roof tops solar solutions.
  • Smart roof team has been involved in the successful installation of a number of these solutions in northern India(Delhi, Rajasthan, UP, Haryana, Punjab, Himachal) . The team members have been working on solar technology for last 20 years and one of the promoters had been involved in policy making for the solar proliferation in India.
  • Smart Roof has a variety of equipment available from almost all the suppliers in India. As such Smart Roof can provide a solution as per your requirement. We have used components of from many suppliers including solar panels from Vikram/ Waaree/ Triana/ Canadian/ Renesys/ Emmvee TATA/ Topsun and the inverters from ABB/ Delta/ SMA/ Schneider.
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Annual Average5.55.4965.465.515.3
Multiple benefits would be there like reduced electricity bill and other tax benefits and incentive from the government while reducing carbon footprint and contributing to the cleaner environment .
Yes, you will still receive the electricity bill. But it would be much lower because the electricity generated by solar will go to the grid and will be credited to your account.
  1. To enjoy practically free power for 25 years.
  2. Increasing tariff rates of Electricity from DISCOMS
  3. Reduction in carbon emissions, contribution towards clean and green environment.
  4. Decreasing prices of Solar PV Panels.
  5. Easy to Install.
  6. No requirement of additional land.
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 440/220 Volt three/single phase line or 33 kV/11 kV three phase lines depending on the capacity of the system installed at residential complex or institution/commercial establishment 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.
Yes, in Haryana it is mandatory for all commercial buildings, schools, hospitals, offices, factories and residential premises bigger than 500 sq yards. Other states are also likely to make it mandatory.
There is a provision of Central Financial Assistance of 30% of the total cost or Rs. 12 to Rs. 18 per watt or Rs. 1.20 crore per MWp under the Grid Connected Rooftop and Small Solar Plants Programme of the Ministry. This is available on First come First Serve basis and with a limited budget.
Solar inverters are designed to block power outflow in the event of grid failure. But if the inverter senses that the power is available (Let’s say from DG Set) then it will start flowing power to load. This means that solar inverter needs to sense that power is available. Some people assume that even if a DG of 1 KVA is installed to send signal to solar plant , it will suffice and solar plant will start giving power. This is theoretically correct but it is not practically possible and practically one needs to connect DG set of 1.25 time load to take benefit of solar power also where in Solar installation should not be more then 80% of DG Capacity. In such a scenario DG will continue to run may be at almost NO load condition so as to consume minimum fuel and power shall be supplied by solar and fluctuations in solar power shall be taken care by DG set.
If above precautions are taken then it is possible to design a system to exploit solar generation and save on fuel costs while DG set is running.
However, recommended settings are - if load is 1KVA then DG capacity should be 1.5KVA and solar capacity which can be installed should not be more than 0.6KVA.
The net metering based rooftop solar projects facilitates self-consumption of electricity generated by the rooftop project and allows for feeding the surplus energy into the network of the distribution licensee. In net metering the beneficiary pays to the utility on net meter reading basis only. Alternatively two meters can also be installed to measure the export and import of power separately. The mechanism based on gross metering at mutually agreed tariff can also be adopted.
Average maintenance cost is almost nil since the components used are having the MTBF (mean time between failure) of 23-25 years.
The life of solar panels is about 40 years but the manufacturers give a warranty for 25 years.
Each KW system will generate about 1575 units of electricity in a year. However, it would depend on specific area.
One can avail the benefit of 40% accelerated depreciation in the first year of installation itself (earlier it was 80%). This can help to significantly reduce your tax liability.
Yes, solar installations are considered under home improvement program. Banks will lend up to 80% of project cost at home loan rate of interest with a 5 years of loan tenure.

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