The main benefit of solar compared to using coal or other polluting sources is the reduced Green House Gas emissions, less effect on the local water bodies, less affect on the coal mining etc. Extracting energy from sunlight reduces several such harmful effects which are otherwise involved when we produce energy from fossil fuels like coal, oil and gas. Many of these fossil fuels are exhaustible sources of energy and also their use leads to air pollution and increased global warming.

Yes,. This is a common practice in India. Even for the same technology—such as 540 Wp mono-PERC solar modules—different companies offer varying prices. Premium brands often charge higher rates due to their strong market reputation, extensive domestic and global certifications, and other factors.