If you've been shopping for a home battery lately, you might have noticed quotes look a little different than they did last year. That's because the federal Cheaper Home Batteries Program changed how the discount is calculated from 1 May 2026 — and if your installer hasn't explained it properly, this article will.
A quick refresher: what the program actually is
The Cheaper Home Batteries Program launched on 1 July 2025. It works through the same Small-scale Renewable Energy Scheme (SRES) that discounts rooftop solar — your battery earns small-scale technology certificates (STCs), and your installer applies their value as an upfront discount on your quote. You don't fill in any forms or wait for a cheque; the discount should simply appear as a line item.
It's been wildly popular. According to the Clean Energy Regulator, around 455,000 batteries had been installed under the program by February 2026 — which is exactly why the rules were tightened.
What changed on 1 May 2026: the tiers
At launch in 2025, the program was worth roughly 30% off — around $372 per usable kilowatt-hour at the time. That flat-rate era is now history. Since 1 May 2026, STC support is tiered by usable capacity:
- First 14kWh — 100% of the STC factor (the full rate)
- Above 14kWh up to 28kWh — 60% of the STC factor
- Above 28kWh up to 50kWh — 15% of the STC factor
- Above 50kWh — no STCs at all (though installs up to 100kWh are still allowed)
In plain English: the government still helps generously with a right-sized household battery, but the support tapers off quickly for very large systems.
The other rules haven't changed. Your battery needs a usable capacity between 5kWh and 50kWh to be eligible, it must be paired with new or existing solar, and it must be VPP-capable — able to join a virtual power plant, though actually joining one remains entirely optional.
Worked example: how the tiers stack up
You don't need exact dollar figures to understand the structure (rates move — confirm current values with your installer). Think of it like this:
- A 14kWh battery earns the full STC rate on every kilowatt-hour. This is the sweet spot for most households.
- A 20kWh battery earns the full rate on the first 14kWh, then only 60% of the rate on the remaining 6kWh. Still a healthy discount, but each extra kilowatt-hour above 14 attracts less support.
- A 35kWh battery earns the full rate on 14kWh, 60% on the next 14kWh, and just 15% on the final 7kWh.
One more thing worth knowing: the DCCEEW has confirmed that step-downs are now more frequent than annual, and the whole scheme winds down towards 2030. The discount you're quoted today is not guaranteed to be there in six months.
What your quote should show — line by line
A quality battery quote in 2026 should never just say "battery: $X after rebate". Ask for an itemised breakdown that separates:
- The battery hardware price — before any discount, with the make, model and usable kWh stated
- The STC discount — as its own line, with the number of STCs and the price per STC the installer is using
- Which tier(s) your battery falls into — if you're buying above 14kWh usable, the quote should show the blended calculation
- Backup hardware — a backup gateway or changeover switch is often extra; make sure it's itemised, not hidden
- VPP assumptions — if the quoted price assumes you'll join a particular virtual power plant, that must be stated clearly. Remember: VPP capability is mandatory, VPP membership is not.
If an installer can't or won't break these out, that's a red flag. Our solar tips guide covers more warning signs to watch for, and it's worth reading up on how the broader rebate landscape works too, since some states stack their own incentives on top.
Sizing smart in the tier era
The tiers quietly reward right-sizing. Before you pay reduced-rate money for capacity beyond 14kWh, check your actual evening usage — for many homes, a well-sized solar battery in the 10–14kWh range covers the overnight load without paying tier-two prices for storage you'll rarely cycle.
Compare before you commit
The single best way to sanity-check a battery quote — tiers, STCs, backup gear and all — is to put it next to two others. Get quotes from up to 3 trusted local installers, free and with no obligation, and see exactly how your rebate should look on paper.
