Calculate Solar Energy

A photovoltaic cell, which is also known as a solar cell, light energy is converted directly into electrical energy without the need for chemical reactions, fuel or moving parts according to Encyclopedia Britannica. to produce a majority of solar cells together DC DC power wiring from multiple silicon wafers assembled. For the operation, the US

appliances and devices, inverters used to convert this power alternated in power AC. By Country Magazine depends determined by complex factors such as angle, direction and efficiency of the panels, sunlight, temperature and weather accurate electrical output. However, you can easily estimate performance.

Calculate Solar Energy

Determine number of panels you wish to add and installation location. Watch area for any shading that occurs during day. Shade can dramatically decrease your system’s energy output.

According to Solar Estimator, this is especially true for photovoltaic solar panels because partially-shaded panel can result in loss of power across panel’s array. Locate solar rating for your region. This rating is average sun-related energy or irradiance that occurs during typical year.

Much of Midwest and east coast receive average of 4 to 5 kilowatt-hours kW-h of daily sunlight. Solar Estimator has irradiance map of U.S. states and territories.

You can also obtain in-depth information about your state from US Department of Energy’s Redbook. Using physical size of solar panels you are adding, estimate their energy production. Modern solar panels, according to Solar Estimator, produce between 8 and 10 watts of power per square foot.

If you add four solar panels that are 5.42 feet by 3.125 feet, you would cover 21.68 feet x 12.5 feet of your roof, or 271 square feet. This equals between 2,168 and 2,710 watts of electricity, or between 2.168 and 2.71 kilowatts. Using your kilowatts figure, determine kilowatt-hours produced by panels. Multiply your kilowatts by solar rating and 365 days.

For example, 2.168 kilowatts and solar rating of five over year would result in about 3,956.6 kW-h annually. If installation location has shade, estimate percentage of panel area in shade and length of time shade is present. If panel is shaded hour day, divide one by your solar rating.

Using example answer, panel is shaded about 20 percent of time. Multiply your kilowatt-hours —3,956.8kwh in example — by 80 percent to get your reduced production of 3,165.44 kwh.

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