Answering the most common questions about solar rooftop solutions

solar rooftop solution

Installing solar rooftop solutions can involve dealing with a slew of complications. This blog answers customers’ most common questions regarding solar panels to assist them in choosing the best system that meets their requirements.

What is a grid-connected solar rooftop solution?

Grid-connected systems are more widespread in urban areas. In this system, the solar panel’s Direct Current (DC) power is converted to Alternating Current (AC) and delivered directly to the unit’s main power supply. The excess power is sent to the electrical grid when the system produces more energy than is required by the plant through Net-Metering.

How much area is required for installing solar rooftop solutions?

About 10-12 of a shadow-free area is required per kilowatt peak (kWp) to install a grid-connected solar rooftop system.

How much does it cost to install a solar rooftop solution?

Systems ranging from 50-100kWp can cost up to INR 42,000/kWp, excluding GST. Capacities up to 500kWp cost INR 39,000/kWp. The final costing will be provided by the EPC company after a thorough site survey. The cost per kW will also depend on the type and makes of the components being offered.

What are the subsidies or capital support from the government?

Central Financial Assistance (CFA) is available only for residential sector grid-connected solar rooftop solutions. CFA is not available for other sectors, including commercial and industrial sectors.

The way the government passes on benefits to commercial clients adopting solar is by way of Accelerated Depreciation. As per the IT Act, even though the actual depreciation annually of solar if 5.26%, solar customers can claim up to 40% depreciation every year. Apart from this there are a host of tax holidays for solar power consumers.

What is the time required to complete the installation of the solar rooftop system?

Due to the customised nature of solar rooftop solutions, it takes about 2-4 weeks to install a small system and about 4-8 weeks for larger systems. Sometimes, these timelines may vary due to access to the site, rain, etc.

How many units of electricity can be generated from the solar rooftop system?

On a clear, bright day, a 1 kWp solar rooftop system may produce 4 to 5.5 units, or around 1250 units annually. This number can vary (+ or – 10%) depending on the exact location of the site. There are many online tools that help in determining the actual estimated generation.

What is net metering?

Net metering is a billing method that compensates solar energy system owners for the electricity they contribute to the grid. For instance, a customer with a solar system on their factory shed may produce more electricity during daylight than the it consumes for various reasons. If the premises is net-metered, the solar rooftop system will export any surplus power to the grid left over after self-consumption.

After the billing period, the net energy used is calculated using a bi-directional or net meter, which records the energy flow in both directions. Only the net amount of energy utilised is due from the recipient. The system owner receives retail value for any excess electricity fed into the grid.

A video explaining this can be found at

Nimbus Solar Solutions: Ushering innovation in renewable solar solutions

Nimbus Solar Solutions was established to diversify and enhance solar solutions for residential, commercial, industrial and agricultural sectors. They supply a wide range of solar products using the best components in the industry. They are backed by a team of experienced and dedicated engineers outfitted with state-of-the-art solar technology.

With a pan-Indian presence, Nimbus specialises in providing highly efficient and customised products and expert technical services for rooftop solar panel installation and maintenance.

For more information, visit:

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