Solar energy refers to energy from the sun. The sun has produced energy for billions of years. It is the most important source of energy for life forms. It is a renewable source of energy unlike non- renewable sources such as fossil fuels. Solar energy technologies use the sun's energy to light homes, produce hot water, heat homes as shown in solar tankless water heater reviews and electricity.
"Solar energy produce no pollution, have no environmental effects and is ecologically acceptable.
The earth receives about 1,366 watts of direct solar radiation per square meter.