See your exact battery size, rebates and payback in seconds
The free solar battery calculator built for Australia. We model the current federal Cheaper Home Batteries Program and your state or territory scheme to estimate what you could pay after every rebate - on screen, instantly, with no email wall.
- Federal + state rebates stacked
- Net cost, savings and payback
- Sources and as-of date shown
Your details
A couple of quick questions - no email required to see your result.
Your instant result appears here
Battery size, rebates, net cost, savings and payback - shown immediately, no email needed.
How it works
Three quick steps from your bill to a battery decision you can trust.
Tell us about your home
Pick your state, enter your quarterly bill or daily usage, and tell us whether you already have solar and how much you want to back up.
See your number instantly
We recommend a battery size and apply the federal rebate plus your state incentive to show net cost, annual savings and payback - no email needed.
Compare real quotes (optional)
Happy with the numbers? Download a free PDF report or compare obligation-free quotes from accredited Australian installers.
Why you can trust these numbers
Most calculators hide your result behind an email form or skip the state rebate detail. We do the opposite: accurate rebate-stacking, shown instantly, with our working in the open.
Rebate-stacking accuracy
We combine the federal Cheaper Home Batteries Program (STC-based, tapered for larger systems) with the specific scheme in your state or territory - so the net cost reflects every rebate you can actually claim.
Sourced and dated
Every figure shows the official source and the date it was last verified (rebate data as of May 2026). When programs change - including the federal step-down on 1 January 2027 - we update the model.
Results-first, no email wall
Your full breakdown appears on screen the moment you calculate. Share your email only if you want the free PDF report or installer quotes.
Frequently asked questions
How much is the federal battery rebate in 2026?
The federal Cheaper Home Batteries Program discounts roughly $251.60 per usable kWh of battery capacity from May to December 2026, delivered as small-scale technology certificates (STCs) and applied by your installer at the point of sale. The value tapers for larger systems and steps down again on 1 January 2027, so the sooner you install the larger the discount.
Which Australian states still have battery rebates in 2026?
Western Australia (Residential Battery Scheme, from $1,300) and the Northern Territory (grant of about $400 per usable kWh, capped at $12,000) still offer upfront state rebates that stack with the federal program. New South Wales offers a one-off VPP incentive plus a zero-interest loan. Victoria, Queensland and South Australia have closed their state battery rebates, so you receive the federal rebate only. The ACT and Tasmania offer interest-free loans rather than upfront rebates.
How big a home battery do I need?
Most Australian homes land between 10 and 20 kWh of usable storage. The right size depends on your daily electricity use, whether you already have solar, and how much of the home you want to back up during an outage. Enter your details above and the calculator recommends a size in seconds.
Is a home battery worth it in Australia?
With the federal rebate plus any state incentive, payback periods have shortened considerably. Whether a battery pays for itself depends on your electricity rate, usage pattern, existing solar and the rebates available in your state. The calculator shows your estimated net cost, annual savings and payback period so you can decide with real numbers.
Do I need to give my email to see the result?
No. The full result - battery size, rebates, net cost, savings and payback - is shown instantly on screen with no email required. You can optionally request a free PDF report or installer quotes, but seeing your number is always free and frictionless.
How accurate are the rebate figures?
We model the current federal Cheaper Home Batteries Program plus each state and territory scheme, and we show the date the figures were last verified along with links to the official sources. Results are estimates for guidance only - confirm your exact eligibility and pricing with an accredited installer.