Finding Kwh From Solar Panels Peak Sun

Thus the output for each solar panel in your array would produce around 500 550 kwh of energy per year.

Finding kwh from solar panels peak sun. The first step is calculating the kilowatts needed. The peak sun hour actually describes the intensity of sunlight in a specific area defined as an hour of sunlight that reaches an average of 1 000 watts of power per square meter around 10 5 feet. A 1 m2 solar panel with an efficiency of 18 produces 180 watts. Assuming a 30 day month an electricity generation of 1 000 kwh is equivalent to 33 33 kwh per day.

Domestic pv systems are commonly between 3 and 4 kilowatts taking up 20 to 30 square metres of roof. Each peak sun hour is defined as one hour when the intensity of sunlight solar irradiance reaches an average of 1 000 watts of energy per square meter roughly 10 5 feet. Sunny summer days lead to higher production than snowy winter ones but it averages out over the course of a year. Peak sun hours differ from hours of daylight.

Once you know the peak sun hours estimating the number of solar panels needed for 1 000 kwh is simple. Multiply the nominal watts of the solar panel by the numbers of hours of sunshine it is exposed to. Peak sun hours refers specifically to how much sun exposure is usable for efficient energy production in an area during a typical day. Although your panels may get an average of 7 hours of daylight a day the average peak sun hours are generally around 4 or 5.

Of course it s not sunny all the time and the output of pv solar panels will drop a little under cloud or on winter days when the sun is. 5 hours x 290 watts an example wattage of a premium solar panel 1 450 watts hours or roughly 1 5 kilowatt hours kwh. Solar radiation peaks at solar noon when the sun reaches the highest point in the sky. 1 m2 horizontal surface receives peak radiation of 1000 watts.

To figure out how to size your solar system take your daily kwh energy requirement and divide it by your peak sun hours to get the kw output. 190 m2 of solar panels would ideally produce 190 x 180 34 200 watts 34 2 kw. You must simply divide the average daily kwh by the peak sun hours. This is the peak power in kilowatts kwp or just kw that a pv array gives in bright summer sunshine.

Then divide the kw output by your panel s efficiency to get the estimated number of solar panels you ll need for your system. At 1 63 m each solar panel can make around 1 45 kwh per day and 3 3 of them can make 4 79 kwh day pretty dang close to the 4 75 kwh again on average. Summer months and locations farther south will generally see more peak sun hours than wintry times and areas farther north. But inclined solar panels also need some spacing between them so practically you would be generating about half the power or 17 1 kw.