How does solar energy work?

The amount of sunlight that strikes the earth's surface in an hour and a half is enough to handle the entire world's energy consumption for a full year. Solar technologies convert sunlight into electrical energy either through photovoltaic (PV) panels or through mirrors that concentrate solar radiation.

Why do people use solar energy?

People have used the sun's rays (solar radiation) for thousands of years for warmth and to dry meat, fruit, and grains. Over time, people developed technologies to collect solar energy for heat and to convert it into electricity. Radiant energy from the sun has powered life on earth for many millions of years.

What is solar energy?

solar energy, radiation from the Sun capable of producing heat, causing chemical reactions, or generating electricity. The total amount of solar energy incident on Earth is vastly in excess of the world’s current and anticipated energy requirements.

Why is solar energy classified as renewable?

Solar energy is classified as renewable because it is derived from the sun, which, for all practical purposes on Earth, is an inexhaustible source of energy. The sun has been producing energy for about 5 billion years through nuclear fusion reactions in its core, and it is expected to continue doing so for several billion more years.

What is solar heating & cooling?

Solar heating and cooling, also known as solar thermal, allows us to capture energy from the sun to heat and cool spaces. Just like using solar energy for electricity, using solar energy for heating and cooling reduces dependence on other energy sources that aren't as sustainable or environmentally friendly.

What is solar radiation?

Solar radiation is light – also known as electromagnetic radiation – that is emitted by the sun. While every location on Earth receives some sunlight over a year, the amount of solar radiation that reaches any one spot on the Earth’s surface varies. Solar technologies capture this radiation and turn it into useful forms of energy.