If you are interested in getting to know how solar energy works and reducing a little from your home energy bill, facts about solar energy will help you. Solar energy is a inexhaustible resource and of the oldest method of energy consumption that is available at present. The critical fact about solar energy is that the sun s rays are so powerful that if we are to convert that into energy it would mean that Earth will never run out of energy for at least another 4.5 billion years according to scientists. Sun never create any hazardous by-product which could harm the environment.
During the early 1950s solar energy was looked upon as an substitute to man made energy resources. Over some research it was found energy could be received at some cheaper source. With a constant figure of 20% – 25% demand growth year-by-year, the solar energy demand increases for last two decades. Solar energy is able to support household gadgets, lighting and water heaters. As of the moment, solar energy is more heavy priced but in the near future with the increase in scientific researches, it will bring down the costs and also growth its efficiency. By 2025, it is expected to generate 2.5% of the world energy demand through solar energy. Solar energy can be considered as the fastest growing technology.
There are some fundamental facts about solar energy that one needs to be acquainted to; solar energy is measured in kilowatt hours and 1 kilowatt=100 watts. One kilowatt hour is equal to the total of electricity which is required to burn 100 watt light bulb for roughly 10 hours. 866 kilowatt is the use by an average American household. The Residential Energy consumption Survey conducted in 2001 shows that an annual energy bill was around $2000.
A reduction in unit costs has contributed towards an increase in growth rates and thereby making it an critical energy resource. After year 2000, solar energy has shown a growth rate of 40% per annum. Solar energy is moving at a increasing rate in the developing countries too as the use of fossil fuel has doubled over the years. When compared to solar energy which is inexhaustible, fossil fuel holds are diminishing. As compared to expensive power grids, setting up solar energy appliances is relatively easy. A disadvantage of fossil fuels is that the prices have risen together with the price of transporting coal, oil and gas.