How do I calculate a solar panel’s output?
Since each solar panel system is different, it is difficult to determine exactly how much power will be produced. Use this handy online calculator get a rough idea of how much money you can save.
There are also some popular factors that can affect solar production & used to measure the potential performance of your system.
Solar panel output per Month
The most popular domestic solar panel system is 4 kW. This has 16 panels, with each one:
- around 1.6 square meters (m2) in size
- rated to produce roughly 265 watts (W) of power (in ideal conditions)
To work out the output per square meter, use this formula:
Number of panels x Capacity of the solar panel system
Capacity ÷ Total size of the system (number of panels x size of one panel)
Example
- 16 panels of 265 W each:
- 16 x 265 = a capacity of 4,240 kW
- The total size of the system (16 panels of 1.6 m2 each)
- 4,240 ÷ 6 = 165 W per m2
