Trusted Advice on Going Solar
in Australia

Find the right solar system size, understand costs and rebates, and maximise your return on investment.

Compare 3 Quotes from Top-voted Installers.

Let us choose for you

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HOW IT WORKS

Compare quotes, claim rebates, and save on the right solar system — all in three simple steps.

Job Details

Enter your property type, location and system size.

Installer Quotes

Up to 4 vetted solar companies send quotes with prices, rebates, and warranties.

You Choose

Review, compare, and pick the best installer.

Plan your costs and savings

Which rebates can I claim? Understand Australia’s rebate and STC incentives and how they reduce upfront cost.

Government Rebates

Which rebates can I claim & how much I save.

Solar Panel Cost

What do solar panels cost in 2025?

Payback Period

What’s they typical ROI for solar?

Feed-in Tariffs

This is where the real savings begin

Savings come from two things: how quickly your system pays itself back and the upfront discount from Australia’s STC scheme.

Learn how STC rebates work and estimate your rebate with our STC Rebate Calculator.

Power Storage & Batteries

Not just panels — batteries can change how you save. Learn the basics before you decide.

Guide: 04

Before you Add Battery Storage

From chemistry types to warranties, there’s more to choosing a battery than capacity alone. Start with the basics.

Read guide

Free solar calculators

Work out your system size, cost and rebate

Use our free tools to estimate the right system size for your home, what it will cost after the government rebate, and how quickly it pays itself back.

Solar Cost
Calculator

Rebate
Calculator

System Size
Calculator

Solar System Size Calculator

Start here: Before getting quotes, you need to know what size solar system suits your home. Use this calculator to find the right system size based on your electricity usage and get accurate quotes faster.

1. Usage

Average quarterly electricity bill

$400

From your power bill. Used to estimate your daily kWh usage.

2. Sunshine by location

Your postcode

Please enter a valid 4-digit Australian postcode.

Enter your postcode to find your peak sun hours.

3. Roof space

How big is your home?

A medium home typically has 30–40m² of usable north-facing roof space, suiting up to a 10kW system.

YOUR RESULTS

RECOMMENDED SYSTEM SIZE

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DAILY PRODUCTION

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←Fill in your details on the left to see your results

Recommended system size—

Minimum viable size—

Maximum useful size—

Inverter size needed—

Disclaimer
This solar system size calculator is not a quote, it's to give you an idea of the right system size for your home. You will need to get quotes from local installers to confirm the right system for your roof and usage.

About GoSolarQuotes

GoSolarQuotes was founded in 2017 by Ben McInerney to give Australian homeowners clear, independent advice on solar — without the sales pressure. Since then, we’ve helped 56,423 Australians compare prices, understand rebates, and get quotes from vetted local installers.

Every installer in our network is checked for a licence, insurance, and customer feedback before they’re approved. Every guide on this site is researched, fact-checked, and updated when conditions change.

We are not a sales company. We don’t take commissions from installers. Our only job is to give you accurate information so you can make the right decision for your home.

Ben McInerney
Founder, Director & Solar Geek

Become a trusted installer in your city.

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Trusted Advice on Going Solarin Australia​