Solar power energy - www.solarpanelrebate.com.au
The sun has energy for billions of years. solar power energy is the sun (solar radiation) that reach the earth.
Solar energy can be converted into other forms of energy such as heat and electricity. In the 1830s, the British astronomer John Herschel used a thermal solar collector box (a device that absorbs sunlight to collect heat) to cook food during an expedition to Africa. Today, people use the sun energy for many things.
Solar energy can be converted into heat (or heat) energy and used to:
* Heat water - for use in homes, buildings, or swimming pools.
* Heat spaces - in greenhouses, homes and other buildings.
Solar energy can be converted into electricity in two ways:
* Photovoltaic (PV devices) or “solar cells” - change sunlight directly into electricity. PV systems are often used in remote areas not connected to the electrical grid. They are also used to power watches, calculators, and illuminated signs.
* Solar Power Plants - indirectly generate electricity from solar heat is used to heat a liquid which produces steam used to power the generator. Of the 15 known solar-electric production units operating in the United States at the end of 2006, 10 of them are in California, and 5 in Arizona. No statistics are collected from solar installations that are less than 1 megawatt electricity, so there may be less solar energy installations in a number of other countries.
The major disadvantages of solar energy are:
* The amount of sunlight that comes when the earth is not constant. It depends on the location, time of day, the time of the year and the weather.
* Because the sun do not deliver that much energy in one place at one time, a large surface necessary for the collection of energy on a recovery rate.
