Home/Solar Size Calculator
Free Solar System Size CalculatorFind the Right Solar Power System Size
Enter a few details about your household power use and the calculator will suggest the system size that suits you. It takes about a minute and costs nothing.
What size solar system do you need?
Your ideal system size depends on how much power you use, when you use it and how much roof space you have. Use the calculator below for a starting point, then talk to us so we can size the system against your actual bill and your actual roof.
The calculator gives an estimate only. Final system size is confirmed during your free on-site assessment, when we check your roof, your switchboard and your daily usage pattern.
What to do with your result
Once you have a size in mind, here is how we turn it into a system on your roof.
Compare it with our packages
Our home packages are approx. 5kW with 12 panels, approx. 7kW with 16 panels and approx. 10kW with 22 panels, each with a hybrid inverter and full installation included.
Send us your power bill
Tell us roughly what you spend on power each month and where you are. That is usually enough for us to confirm or adjust the size the calculator suggested.
Book a free on-site assessment
Our own team checks the roof, the pitch and the switchboard, then gives you a written proposal with system size, panel layout, price and estimated payback.
Ready to see the numbers for your home?
Send us your details and our team will come back with a system size, a price and an estimated payback for your address. The assessment and the quote are both free.