California Solar

how much energy does a solar panel produce per Month

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)


  • 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

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