Calculate Solar Panel Output Kwh

To figure out how many kilowatt hours kwh your solar panel system puts out per year you need to multiply the size of your system in kw dc times the 8 derate factor times the number of hours of sun.

Calculate solar panel output kwh.

Thus the output for each solar panel in your array would produce around 500 550 kwh of energy per year. Nrel s pvwatts calculator estimates the energy production and cost of energy of grid connected photovoltaic pv energy systems throughout the world. 5 kw x 1900 kwh kw x 78 output x 25 or 1 850 per year. How many solar panels do i need for 1 000 kwh per month.

The first step is calculating the kilowatts needed. But every home is unique and could use more or less power than the average home. Simply put once you know how much power each panel puts out simply divide it by the square feet of the panel. Given 1kw of panels produces 1642 kwh per year in ca and 1kw of panels takes up 68 42 square feet solar panels installed in california on average produce 23 99 kwh kilowatt hours per square foot per year.

For instance if you have a panel that puts out 265 watts and is 65 4 by 39 inches in size the energy produced per square foot would be around 15 watts. So if you have a 7 5 kw dc system working an average of 5 hours per day 365 days a year it ll result in 10 950 kwh in a year. It allows homeowners small building owners installers and manufacturers to easily develop estimates of the performance of potential pv installations. Then find that the los angeles area lies within the 1 900 number on the map so the calculation for a 5 kw system would be.

5 hours x 290 watts an example wattage of a premium solar panel 1 450 watts hours or roughly 1 5 kilowatt hours kwh. Once you know the peak sun hours estimating the number of solar panels needed for 1 000 kwh is simple. You can use the table of solar power production per kw for each state above to do the same math for your state. This calculator may come in handy when you buy solar panel s for your rv vehicle boat camper or home solar system and you want to get a real.

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. Or in massachusetts where electricity costs 20 kwh and a kw of solar panels makes about 1 500 kwh per year the panels save you 1 170 per year. Solar system output calculator calculate the average daily kwh hour output in your area based on a well installed solar system in a suitable position e g no overshadowing. According to the u s.

Energy information administration in 2018 the average monthly electricity consumption for a home in the united states was 914 kwh per month or about 30 5 kwh per day and 11 000 kwh per year.