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 day
Use this formula to calculate how much power your module produces in a day, measured in kilowatt-hours (kWh).
Solar panel size (square meters) x 1,000
This number x solar panel efficiency (percent as a decimal number)
This number is times the number of hours of sunshine per day in your area divide by 1,000
See below for more information on efficiency.
Use this calculator to estimate the hours of sunshine in your area. example
The panel is 1.6 square meters:
6 x 1,000 = 1,600
The efficiency of the panel is 20%.
1,600 x 0.2 = 320
Your area receives 4.5 hours of sunshine per day*:
320 x 4.5 = 1,440
Divide by 1,000.
1,440 ÷ 1,000 = 1.44 kWh/day
*Sunshine hours vary greatly throughout the year (July estimated at 4.5 hours) and are considerably less, especially during the winter months.