Solar panel efficiency calculationĪfter carefully following the simple steps above, you will have all you need to know how efficient a certain solar panel is.
This refers to the amount of light energy received by a unit surface at a given time.
On the other hand, the input irradiance is the radiant power supplied per unit area which is equal to 1000 Watts per square meter at Standard Test Conditions (STC). The power absorption of the module is the maximum solar module Wattage divided by its surface area. Solar panel efficiency can be simply described as the ratio of the module’s power absorption to the input irradiance on standard test conditions. In case you missed it, you can also try our voltage drop calculator to validate the solar cable size for your PV system. Click the “Calculate” button right after entering the required data. Just enter the correct values for the solar panel maximum power at STC, length of the module and its width in millimeters (mm). Try our tool below to check how efficient your solar PV module is. Additionally, you will now be able to confirm the module efficiency details when you see a solar panel using this method. Where, Pmax = solar panel peak power (in Watts) Area = length x width of the solar panel (in sq.m.) 1000 = Standard Test Condition ( STC) irradiance (in Watts/sq.m.)īy this simple solar module efficiency formula, you will know how efficient a solar panel is, aside from looking it up on its specification sheet or at its nameplate. Solar panel efficiency calculationĮfficiency (%) = ( Pmax ÷ Area) ÷ ( 1000) x 100%