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Question :   How can we get electricity from the sun?
Answer :   When certain semiconducting materials, such as certain kinds of silicon, are exposed to sunlight, they release small amounts of electricity. This process is known as the photoelectric effect. The photoelectric effect refers to the emission, or ejection, of electrons from the surface of a metal in response to light. It is the basic physical process in which a solar electric or photovoltaic (PV) cell converts sunlight to electricity.
Question :   How big a solar energy system do I need?
Answer :   The size of solar system you need depends on several factors such as how much electricity you use, how much is the size of your roof, and how much you're willing to invest. Also, do you want the system to supply your complete energy usage or to supplant a portion of your higher cost energy usage? You can contact a system designer/installer to determine what type of system would suit your needs.
Question :   How is a solar electric system designed, installed, and maintained?
Answer :   You could install a photovoltaic (PV) or solar electric system yourself. But to avoid complications or injury, you will probably want to hire a reputable professional contractor with experience in installing solar systems. PV systems have few moving parts, so they require little maintenance. The components are designed to meet strict dependability and durability standards so they can stand up to the elements. However, they are fairly sophisticated electric systems, so installation usually requires the knowledge and experience of a licensed electrical equipment contractor.
Question :   How much does a solar energy system cost, and how much will I save on utility bills?
Answer :   There is no single or simple answer. But a solar rebate and other incentives can reduce the cost of a PV system. This cost depends on a number of factors, such as whether it is a stand-alone system or is integrated into the building design, the size of the system, and the particular system manufacturer, retailer, and installer. Moreover, depending upon your needs and number of equipments you want to run from solar energy, the cost varies. Various schemes have also been provided by the Govt. to promote Solar plant.
Question :   How does a solar water-heating system work?
Answer :   Every solar water-heating system features a solar collector that faces the sun to absorb the sun's heat energy. This collector can either heat water directly or heat a "working fluid" that's then used to heat the water. In active solar water-heating systems, a pumping mechanism moves heated water through the building. In passive solar water-heating systems, the water moves by natural convection. In almost all cases, solar water-heating systems work in tandem with conventional gas or electric water-heating systems; the conventional systems operate as needed to ensure a reliable supply of heated water. There are many types of solar water heaters. Each has strengths to recommend it for specific climates and water conditions. Solar system professionals can help you select the most appropriate system for your area and your needs.
Question :   Can a solar water heater replace an electric or gas water heater?
Answer :   Not completely. Conventional electric or gas water heating systems are still necessary as a supplement to the solar water heating system, largely because the sun might not shine in a particular area for several days at a time. However, because solar water heaters are designed provide hot water directly to the tank of a gas or electric water heater, they reduce the need for the water heater to run on conventional fuels. And this in turn reduces your gas or electric bill.Depending on where you live, solar water heaters can provide up to 80% of your home's annual water-heating needs.
Question :   What are the environmental benefits of solar energy?
Answer :   Solar power, like other renewable energy resources, has many environmental and health benefits. Going solar reduces greenhouse gas emissions, which contribute to climate change, and also results in fewer air pollutants like sulfur dioxide and particulate matter, which can cause health problems.
Question :   What is the gross potential of solar power in the country?
Answer :   India is endowed with vast solar energy potential. About 5,000 trillion kWh per year energy is incident over India's land area with most parts receiving 3-5 kWh per sq. m per day. Based upon the availability of land and solar radiation, the potential of solar power in the country has been assessed to be 750 gwp.
Question :   How is LEDs disposed recycled?
Answer :   LEDs are primarily made of electronic components like PCBs, diodes, semiconductors etc. Therefore, they must be treated in the same way that traditional electronics are treated. They collected separately from household wastes and must be treated the same as standard electronic equipment.
Question :   Is LED tube light as bright as my fluorescents?
Answer :   Yes, you may even be able to use fewer tubes in your fixtures - and, they maintain their lumen output for years to come, use substantially less energy, extend the life of the ballast, and have a life expectancy of ten years*!

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