Formula For Determining Solar Panel Sizing

Total number of solar panels to calculate the size of your solar photovoltaic system take your daily kwh energy requirement and divide by your peak sun hours to get the kw output you need.

Formula for determining solar panel sizing.

The number of solar panels of the size used in the calculation will theoretically meet that energy demand during a sunny day. So to determine the wattage of solar panels required we will use the formula watts volts x amps w v x a. 6 hours of sun in south africa 2. For amps we will plug in the number we just found 29 4 a.

13 6 hours 6 sun hours 2 26 days to fully charge. You calculate how many solar panels you may need by dividing the maximum hourly solar energy system output by the wattage output of one single panel. 1302 wh to replace 6 hours sunlight 220 w panel rounde off. Then divide the kw output by your panel s efficiency to get the estimated number of solar panels you ll need for your system.

Then divide the kw output by your panel s efficiency to get the total number of solar panels for your system. Calculate the size of your solar system. Amps the solar panels must generate in full sun. Solar panels are rated in watts but we know how many amps we require.

17 42 panels to generate 11 000 kwh year. Use a low wattage 150w and high wattage 370w example to establish a range ex.