The solar panels generate DC (direct current) electricity from sunlight. They are installed on shadow free area of the rooftop or ground usually facing south for maximum output. The most commonly used technology is polycrystalline. Quality and efficiency of the panels is as important as the cost. After all one should consider the lowest cost of power, and not the lowest cost of panel. Typical solar panel size is 1m x 2m and has a rated capacity of 300Wp-350Wp. 1kW of Solar panels produce approx. 1400-1500 units of electricity yearly.
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