What is meant by Active Solar

Active solar is a term which refers to the use of solar energy to "actively" convert the energy in sunlight into other forms. It is contrasted to passive solar which refers to certain architectural design elements by which buildings make use of the sun's energy for heating, and/or cooling.

Typical solar systems include:

• Solar cells: For the generation of electricity directly from the Sun.
• Solar space heating: Using solar-generated heat for heating buildings
• Solar water heating: Using solar-generated heat for heating water

The term is sometimes extended to include other renewable energy systems whose ultimate energy source is the Sun, such as:

• Wind energy: Using wind currents to generate electricity or do other work
• Hydroelectric: Using the energy of flowing water to generate electricity
• Biomass: Using organic materials directly to burn for heat or to generate biofuels to burn