Solar Panel Power Calculation Formula

Here s a simple formula for calculating your solar panel s power output.

Solar panel power calculation formula.

Most load calculations include a discount factor for the inefficiency of recharging the battery. Look at the 60 watt panel top of the page. The photovoltaic pv solar panels are used in residential installations come in varying wattages from 150 watts to 370 watts per panel. Therefore taking into account the 4 to 5 hours sunshine per day consideration we calculate the true power for the solar panel which would enable your load to keep running throughout the year.

What s that 75 percent for. The power generation capacity of a solar panel is given in watts. E a r h pr e energy kwh a total solar panel area m2. We have a 60 watt solar panel that has an imp amps maximum power point of 3 49.

The global formula to estimate the electricity generated in output of a photovoltaic system is. 20 percent is typical. 1 000 watt hours 5 hours sunlight 200 watt solar panel. Solar panel watts x average hours of sunlight x 75 daily watt hours as an example let s say you have 250 watt solar panels and live in a place where you get 5 hours of sunlight per day.

In theory to calculate the energy it can supply to the battery you multiply watts of the solar panel by the hours exposed to sunshine.