Follow the path of solar energy from the Sun to your world:
| The Sun produces radiant energy by consuming hydrogen in nuclear fusion reactions. Solar energy is transmitted to the earth in portions of energy called photons, which interact with the earth's atmosphere and surface. It takes about 8 minutes and 20 seconds for the sun's energy to reach the earth. | |
| The Earth receives and collects solar energy in the atmosphere, oceans, and plant life. Interactions between the sun's energy, the oceans, and the atmosphere, for example, create winds, which can produce electricity when directed through aerodynamically designed wind machines. | |
| Solar photovoltaic cells convert solar radiation into electricity (photovoltaic literally means "light energy"; "photo" = light, "voltaic" = energy). Individual cells are packaged into modules, like the one shown at the right; groups of modules are called arrays. Photovoltaic arrays act like a battery when the sun is shining, producing a stream of direct current (DC) electricity and sending it into the building or sharing it with the grid. | |
| The inverter converts direct current (DC) electricity generated by the array into alternating current (AC) electricity for use in the building. Most electrical loads (energy-consuming devices like lights, motors, computers, and air conditioners) in schools, homes and businesses use AC electricity. |
