Formula For Determining Solar Panel Sizing

Calculate the size of your solar system.

Formula for determining solar panel sizing.

So to determine the wattage of solar panels required we will use the formula watts volts x amps w v x a. Then divide the kw output by your panel s efficiency to get the total number of solar panels for your system. 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. You can calculate how many solar panels you need by multiplying your household s hourly energy requirement by the peak sunlight hours for your area and dividing that by a panel s wattage.

For amps we will plug in the number we just found 29 4 a. 6 hours of sun in south africa 2. Use a low wattage 150w and high wattage 370w example to establish a range ex. Amps the solar panels must generate in full sun.

The number of solar panels of the size used in the calculation will theoretically meet that energy demand during a sunny day. 1302 wh to replace 6 hours sunlight 220 w panel rounde off. 17 42 panels to generate 11 000 kwh year. Then divide the kw output by your panel s efficiency to get the estimated number of solar panels you ll need for your system.

13 6 hours 6 sun hours 2 26 days to fully charge. 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.