How Many Watts Does A Solar Panel Produce Per Day

In the picture above the label shows an stc rating of 250 watts for the panel.

How many watts does a solar panel produce per day. The first is to look at the peak possible instantaneous solar power production per square foot for a particular solar panel. A common size solar panel array is usually around 5kw and takes up around 400 square feet of space. Now to figure out how much energy is produced per month multiply those 1000 watts by either 30 or 31 days depending on the month of course. To put that into perspective a typical household uses about 897 kwh per month.

For the sake of example if you are getting 5 hours of direct sunlight per day in a sunny state like california you can calculate your solar panel output this way. For example if a 300 watt 0 3kw solar panel in full sunshine actively generates power for one hour it will have generated 300 watt hours 0 3kwh of electricity. If that panel received full sun for one hour you d get 250 watt hours of electricity. That same 300 watt panel produces 240 volts which equals 1 25 amps.

An array of this size can produce an average of 350 850 kwh of ac energy per month. 5 hours x 290 watts an example wattage of a premium solar panel 1 450 watts hours or roughly 1 5 kilowatt hours kwh. They generate less power when the sun is low in the sky mornings and evenings or when clouds are moving across the rooftop. Unfortunately solar panels don t generate a steady stream of electricity all day.

That s approximately equal to the power of the sun at noon on a sunny day at the equator. Therefore to figure out how much power the panel produces in a day simply multiply the 250 watts by 4 hours which comes to 1000 watts per day. For a 300 watt solar panel with dimensions 64 inches x 39 inches 1 61 meters squared or 17 31 square feet the peak instantaneous electricity production per square foot at stc is 14 58 watts per square foot.