The federal solar battery rebate drops 19% on 1 May 2026
A typical 10 kWh home battery earns $3,192 if installed by 30 April. From 1 May, the same install earns $2,584 — a $608 hit. Here's exactly what the change means for every common battery size, and whether it's worth racing the deadline.
STC spot price used: $38.00 · Source: Clean Energy Regulator · See methodology
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The rebate before and after 1 May
How much the Cheaper Home Batteries Program pays out for common battery sizes, covering STC zones 3 and 4 (approximately 95% of Australian postcodes).
| Battery size | Typical product | By 30 April | From 1 May | You lose by waiting |
|---|---|---|---|---|
| 5 kWh | Entry-level battery (minimum eligible size) | $1,596 | $1,292 | $304(19%) |
| 10 kWh | BYD Battery-Box 10.24, sonnenBatterie 10 | $3,192 | $2,584 | $608(19%) |
| 13.5 kWh | Tesla Powerwall 3 | $4,309 | $3,488 | $821(19%) |
| 14 kWh | Top of the un-tapered band | $4,469 | $3,618 | $851(19%) |
| 20 kWh | Stacked Powerwall 3, BYD HVM stacks | $6,384 | ~$3,800–$4,200(indicative) | $2,184–$2,584 |
| 27 kWh | Sigenergy SigenStor, large residential stacks | $8,618 | ~$4,400–$5,100(indicative) | $3,518–$4,218 |
Entry-level battery (minimum eligible size)
BYD Battery-Box 10.24, sonnenBatterie 10
Tesla Powerwall 3
Top of the un-tapered band
Stacked Powerwall 3, BYD HVM stacks
Sigenergy SigenStor, large residential stacks
Figures are indicative, based on an STC spot price of AUD $38.00 (as at 24 April 2026), deeming factors published by the Clean Energy Regulator (8.4 to 30 April; 6.8 from 1 May), and the 14 kWh un-tapered band announced in the 1 May 2026 program changes. Installer admin fees (typically 2–5% of STC gross) reduce the pass-through to your quote. For batteries larger than 14 kWh, the taper on capacity above 14 kWh is still being finalised by CER — figures in that row will be updated when bands are published. See methodology.
Why this is happening
The Cheaper Home Batteries Program (CHBP) launched on 1 July 2025 with a deeming factor of 9.3, stepping down to 8.4 in January 2026. On 1 May 2026 it drops again — this time to 6.8 — and the program shifts from a flat rate to a size-based taper that caps the full rate at the first 14 kWh of usable capacity.
Translation: the rebate is still generous. But the government intends it to fade every six months through to 2031, and 1 May is one of the bigger single steps. If you were going to install anyway this quarter, the $600–$2,000 saving is real money.
Should you rush it?
If you've already had quotes
Chase the installer to confirm the install completes by 30 April. STCs are assigned on install date, not sign date — a deposit alone doesn't lock the current rate in.
If you're still deciding
The rebate is still worth having post-May 1 — it just gets smaller. A 10 kWh system still takes roughly $2,500 off the sticker price. Don't panic-buy a battery you didn't already want.
If your system is larger than 14 kWh
You lose the most from the step-down. The taper on the second band is the part we're still waiting on — subscribe above and we'll email you the moment CER publishes final numbers.
If you're nowhere near ready
The next step-down is in January 2027. Plan around that if you'd rather not rush. The program is funded through 2031, so there's still time.
State rebates that stack on top
The federal CHBP is separate from state incentives. Where you live changes the total:
- NSW — Peak Demand Reduction Scheme (PDRS) still active. Extra battery incentive plus up to ~$1,500 for joining a VPP. Stacks with federal.
- WA (SWIS) — Synergy Home Battery Scheme pays up to $1,300 for joining a VPP. Separate Horizon scheme for regional WA. Stacks with federal.
- ACT — Sustainable Household Scheme interest-free loan still active. A separate $5,000 rebate is scheduled to end May 2026 — confirm eligibility directly with ACT Government before relying on it.
- VIC, SA, QLD, TAS, NT — no active state battery rebate as of today. Federal CHBP only.
Frequently asked questions
Who's eligible for the Cheaper Home Batteries Program?
Any Australian household or small business installing a battery between 5 kWh and 100 kWh nominal capacity, paired with a new or existing solar PV system, using a battery and inverter on the Clean Energy Council approved list, installed by an SAA-accredited installer. One rebate per property (NMI). No owner-occupier restriction — investors and landlords are eligible. Off-grid installs are exempt from the VPP capability requirement.
Do I have to join a Virtual Power Plant?
No — the battery must be VPP-capable (most modern batteries are), but enrolment is not required. You can keep the battery fully under your own control and still claim the rebate.
Is the rebate paid in cash?
No. It's delivered as an upfront discount on your installer's quote, funded through Small-scale Technology Certificates (STCs). Your installer creates and sells the STCs on your behalf and passes most of the value through to your quote (minus a small admin fee, typically 2–5%).
Can I still claim STCs on a new solar install at the same time?
Yes. Solar PV STCs and battery STCs are separate and both claimable on a combined install. Your installer will itemise each component in the quote.
What happens after 1 May 2026?
The deeming factor drops from 8.4 to 6.8 and a size-based taper is introduced — the full rate applies only to the first 14 kWh of usable capacity. Capacity above 14 kWh earns a reduced rate (exact bands pending CER publication). Further step-downs are scheduled every six months through to the program's intended end in 2031.
Which batteries qualify?
The battery and inverter must be on the Clean Energy Council approved products list. Common qualifying brands include Tesla Powerwall 3, BYD Battery-Box, sonnenBatterie, Sigenergy SigenStor, Enphase IQ Battery, and LG RESU. Your installer will confirm compliance before lodging the STCs.
What state rebates can I stack on top?
NSW (Peak Demand Reduction Scheme) and WA (Synergy Home Battery Scheme) currently stack with the federal rebate. ACT still has an interest-free loan scheme. VIC, SA, QLD, TAS and NT have no active state battery rebate as of April 2026 — federal only.
How we make money
Unusual answer for a comparison site: we'll just tell you. When you request quotes through Big Aus, we're paid a fee by the installer we connect you with — typically $110 to $160 per exclusive lead.That's it. We never sell the same enquiry to three different installers (the industry-standard model that made Australians hate comparison sites), and we don't promote products that don't qualify for the Cheaper Home Batteries Program just because they pay higher commissions.
The content on this page — including every number in the comparison table — is written the same way whether or not you click “Get Quotes.” If the best answer for your situation is “wait six months,” we'll say so.
Methodology
- STC price used: AUD $38.00 (nominal as of 24 April 2026, per Demand Manager spot board).
- Deeming factors: 8.4 to 30 April 2026; 6.8 from 1 May 2026. Source: Clean Energy Regulator.
- Formula (pre-1 May 2026): rebate = usable kWh × deeming factor × STC price.
- Formula (from 1 May 2026): full rate on first 14 kWh; reduced rate on capacity above 14 kWh (exact bands pending CER publication).
- Admin fees: installers typically retain 2–5% of the STC gross for creation and trading costs. Figures shown are indicative of what is passed through to your quote.
- Eligibility rules: per the DCCEEW Cheaper Home Batteries Program eligibility page.
Methodology version 1.0. For the full framework, see our methodology page.