Everything you want to know about solar energy

Frequently Asked Questions

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Frequently Asked Questions About Rooftop & Other Services :

Sunlight (light, not heat) on photovoltaic modules produce direct current (DC) electricity which is converted to alternating current (AC) by a device called an inverter, which is then wired into your main service panel where it feeds your internal power grid.
Solar modules (panels) and inverters are the main components of a solar power system and they constitute 70% of project cost.
1 kWp solar system requires approximately 10 sq. m (or 100 sq. ft) of shadow free area. Therefore, one 1 MWp (1000 kWp) solar system would require 10,000 sq. m / 1,00,000 sq. ft / 3 acres of shadow free area.
1 MWp (1000 kWp) solar system would cost around 5-6 crores, including all components, installation and commissioning, delivery and taxes.
1 MWp (1000 kWp) solar plant would require 3-6 months for installation and commissioning, and typically only 30-45 days of actual work at the site.
Yes, wind load is considered. The wind load will depend upon the exact location. The installer should consider IS standards for the specific location. But solar power plants can be designed for any wind load.
Solar photovoltaic panels have no moving parts, and therefore require little maintenance, which will include module cleaning with water every 2-4 weeks and preventive electrical maintenance every 3 months.
A 1 MW plant will generate around 15 lac units in the first year. The exact power generated will be subject to location of the solar power plant.
Yes, the power produced will degrade at 0.5 -0.8 % each year. In the 25th year, the solar system will still produce 80-90% of the energy produced in the 1st year.
The solar panels have a warranty for a period of 25 years, however, the projected life is longer.
The evacuation of solar power happens in the LT room, in most cases at 415 V.
Metal rooftop solar system requires 20% lesser area than RCC rooftop solar or ground mount systems. Rooftop solar helps to reduce ambient room temperature by around 2 degree Celsius. Otherwise, both systems are equivalent.
The cost of both systems are approximately the same on a per Watt peak (Wp) basis.
Solar panels will be mounted on high-quality aluminum structures, which will be fixed onto the roof sheets.
Yes, if the roof sheets belong to the standing seam segment, then solar panels can be installed without penetrating the roof. If not, then penetration is necessary, although precautions are taken to prevent leakage. Installation on RCC roofs does not require any penetration.
For installations greater than 1 MW in size, typically, central inverters are used, and these will be set up in a separate room, called the control room. For smaller installations, string inverters are used, and these are erected on the roof or on the factory floor.
It will not, as the roofs aren't tampered. Just as screws are used to fix the roof sheets, we use screws to fix the modules.
Yes. Since 60-70% of cost depends on the solar panel, if there is a fall in the panel cost it, in turn, will reduce CapEx requirement, and this benefit can be passed to the client. But if the cost of other components such as aluminum structures, copper wires which are steadily rising is considered, then the total project cost is more or less stable.
It depends on the demand-supply model based on global economics. While in India most of the modules are imported, the import duty increases the cost of PV panels, along with the various applicable taxes. So, it’s difficult to predict any cost.
Solar panel prices have declined significantly in the past 5-10 years. This has resulted from a combination of incremental technology improvements, the move to large-scale manufacturing in China, and an overcapacity in the market from 2007 to 2015. However, in mid-2017, module prices had stabilized but have now started increasing as a result of surging demand and various import duties that are levied on them due to geopolitical trade issues worldwide.