Free for Australian homeowners

Find out how much you could save on energy

Answer 10 quick questions about your home and get a personalised action plan ranking every upgrade by ROI — solar, battery, insulation, heat pump, and more.

Takes about 90 seconds. No sign-up required.

How It Works

1. Tell us about your home

Answer 10 quick questions about your postcode, home type, energy bill, and existing systems. Takes about 90 seconds.

2. Get your action plan

We crunch the numbers across 7 upgrade categories and rank every option by payback period, cost, and savings.

3. Connect with installers

Request free quotes from vetted local installers for any recommended upgrade. No obligation.

Every upgrade, compared

We analyse 7 upgrade categories and show you exactly what each one would cost, how much it would save, and which rebates you qualify for.

Solar PV

System sizing, STC rebates, payback

Home Battery

Peak shifting, tariff arbitrage

Insulation

R-value, heating/cooling savings

Heat Pump HW

Running cost comparison, STCs

Draught Sealing

Low-cost, fast payback

Double Glazing

Thermal performance upgrade

Efficient AC

COP comparison, gas switching

Get Started →

Privacy First

No cookies, no tracking pixels. We use privacy-respecting analytics. Your data is never sold.

Transparent Methodology

Every calculation is documented. We show our assumptions, data sources, and formulas. No black boxes.

Always Free

The calculator is and always will be free. We earn referral fees from installers — only if you choose to request quotes.

Ready to find your savings?

Join thousands of Australian homeowners who've used WattSwitch to find the best energy upgrades for their home.