A Solar panel (also known as "PV panels or modules") is a device that converts light from the sun, which is composed of particles of energy called " photons ", into electricity or electrical energy that can be used to power electrical loads.

Solar panel cost depends on the wattage and the type of cells used. For example, if a solar energy panel is made up of Topcon cells and it has a wattage of 610wp (eg Adani Solar 610wp solar power panel)then the cost of that solar module will be around 20000/- rupees in India whereas , if a solar panel is made up of mono perc cells and having a wattage of 540wp then the price will be around 19000/- in India. Price may vary depending on the brands and warranty.

Since September 22, 2025 , Solar panels and other key renewable energy devices( including solar equipments) have been subject to a 5%Goods and Services Tax (GST) in India. This is a reduction from the previous rate of 12%. This reduction in GST rate will result in a positive and fast paced adoption of solar power in residential and commercial consumers.

The number of solar panels needed to power a house varies, but the average is between 6 and 10 panels, which is enough for a typical 3-5 kW system. The exact number depends on factors like your home's energy consumption, location and sunlight, solar panel efficiency, and roof space. Climatic condition is also one of the key factors. You can get a more precise estimate by calculating your daily average energy use and dividing it by the peak sunlight hours in your area, then dividing that number by the panel's output rating.

To run a house in solar energy, it must be an Off grid solar or Hybrid solar power system because on grid or grid tie systems don't work during power outages and doesn't provide backup.