Solar power is the result of converting sunlight into electricity. Sunlight can be converted directly into electricity using photovoltaics (PV), which normally focuses energy to boil water which is then used to provide power. The solar power gained from photovoltaics can be used to eliminate the need for purchased electricity (usually electricity gained from burning fossil fuels) or, if energy gained from photovoltaics exceeds the home's requirements, the extra electricity can be sold back to the home's supplier of energy, typically for credit.

Solar energy for thermal energy (heat). Solar thermal collectors are defined by the USA Energy as low-, medium-, or high-temperature collectors. Low temperature collectors are flat plates generally used to heat swimming pools. Medium-temperature collectors are also usually flat plates but are used for creating hot water for residential us. Solar energy is free. Yes, but you will need to install solar panels to harvest the power of the sun. Depending on your geographic location, energy use and installation factors, the typical home will require a 2kW to 6kW solar panel system. Based on your energy needs, the upfront costs for equipment and installation could range from $5,000 to $25,000, after rebates and tax credits. That's much cheaper compared to paying your electric utility for 25 years. For example, if your monthly electric bill is around $200, you'll spend more than $80,000 with your traditional electric utility. But if you install solar panels, you could save $45,000 or more.