Solar Panel Output

Solar Panel Output
  • Solar panels will provide you with free energy and give you the opportunity to reduce your electricity bills to zero
  • A typical 4kW solar panel system will generate 3,400kWh of electricity; this is enough to power a washing machine for 4,857 hours
  • To compare prices of solar installers in your area, enter your zip code in the form at the top of the page


What is the typical output of a solar panel?

All solar panel systems are different, so to give you an understanding of typical solar panel output, let’s look at the average for residential solar panel systems:


  • Residential solar systems tend to range in size from 2kW to 5kW
  • Typically, the bigger the system size, the bigger the output
  • An average 2kW system has an output of around 1,700kW units
  • A typical 5kW system will have an output of around 4,500kW units


The table below shows the average output for typical sizes of residential solar panels:


System SizeTypical Annual Output
1kW850 kWh
2kW1,7500 kWh
3kW2,550 kWh
4kW3,400 kWh
5kW4,500 kWh


How much energy is this?

Typically, a 3 to 4 kW solar panel system will produce enough energy for a family sized home, while a 2 to 3 kW will typically be the right size for a smaller household.

An average 4 kW solar panel system will generate around 3,400kWh of free electricity a year. That’s enough electricity to individually power:

  • 4,857 hours of the washing machine
  • 97,143 hours of the fridge
  • 1,880 hours of boiling the kettle
  • 1,417 hours of the oven


How do I improve the output of my solar panels?

There are 4 key factors that will determine just how much electricity you can create with solar panels for your property:

  • The size of the system is the most important factor of all. The typical domestic installation is a 3.5kW system, which is normally around 12 panels. A smaller 1kW domestic system is likely to be only 2 panels.
  • The direction that your roof faces and the angle of the roof comes next. For optimum performance, your panels will need to be on a 35-degree angle, facing south.
  • Having a roof that is not in the shade will increase the amount of electricity you are able to produce. Take a look at the handy table above, which shows you what output volume can be expected from a domestic solar installation.
  • The time of year will also have an impact. During longer daylight hours in the summer you will be able to produce proportionally more power. That said, it’s important to remember solar panels work from light not heat so will still produce energy all year round.