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  • Solar Power Systems from 2kW to 10kW

Get a Free Home Solar Power Quote

Free Home Solar Quote 

  • CEC Accredited PV Installers
  • Best Quality System Components
  • Australia's Leading Solar Company
  • All Prices Include Full Installation
  • Solar Power Systems from 2kW to 10kW
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Solar Calculator

Solar Power Size calculator

Finding the right size solar power system for your home or business need not be a complicated procedure, there are some simple and reliable methods to performing this calculation.

What size solar system do you need?. The average 3 bedroom Australian home will get by with a 3kW system however there are so many variables in the solar equation that its not always so clear, for example how energy efficient is your home?, do you have LED lighting installed, do you use heavy power consuming devices like air-conditioners, cloths dryers or dish washers.

The good news is that this has all been worked out before so there are fully automated online solar calculators that can help you work out your solar system size.

There are other factors to consider when choosing a system size for example how much available roof space for the solar panels do you have, additionally is all of the roof surface area viable for solar panels and not shaded. The table below shows a rough guide to solar power system sizing, for a more precise calculation of your required system size use the solar calculator.

A general guide to solar system sizes
System Size kW Panels x Watts Roof Area M² Daily kWh
2.0 kW 8 x 250W 14 M² 8.4 kWh
3.0 kW 12 x 250W 20 M² 13 kWh
3.5 kW 14 x 250W 24 M² 15 kWh
4.0 kW 16 x 250W 27 M² 17 kWh
5.0 kW 20 x 250W 34 M² 21 kWh