The rebate is now a declining clock, not a fixed offer
The federal Cheaper Home Batteries Program subsidises household battery installations through the small-scale technology certificate mechanism, so the discount comes off the installed price rather than arriving as a cheque. Two changes that took effect on 1 May 2026 altered how it behaves: the rebate now decreases every six months rather than annually, and the per-kilowatt-hour discount moved from a flat rate to a tiered structure based on the size of the battery installed.
The step-down is deliberate. It tracks falling battery prices, so the subsidy shrinks as the technology gets cheaper. The certificate rate declines across the life of the program, from 6.8 certificates per kilowatt-hour in the May to December 2026 period down to 2.1 by 2030.
The practical consequence is that "should I get a battery" and "when should I get a battery" are now genuinely different questions with different answers, because the size of the discount is a function of the date you install.
What a six-monthly step-down actually costs you
Because the discount is per kilowatt-hour of installed capacity, the effect of waiting scales with system size. A household considering a larger battery is exposed to a larger absolute reduction at each step than one considering a small unit, which inverts the usual intuition that bigger purchases can wait.
It is worth being careful here, though. A shrinking subsidy is only a reason to hurry if the underlying price is not falling faster than the subsidy is. The program is designed around the expectation that battery prices decline over time, and if they decline faster than the certificate rate, waiting can still leave you better off in absolute terms. What you cannot do is assume the discount will be there in its current form later — it will not.
The government also expanded the program substantially, from original estimates of around $2.3 billion to an estimated $7.2 billion over four years, with the expectation of more than two million Australians installing a battery by 2030. A larger program with a declining per-unit rate is a policy designed to bring installations forward.
Size the battery to your usage, not to the rebate
The most expensive mistake in battery buying is oversizing. A battery only earns its keep on the energy it actually cycles: stored solar you would otherwise have exported cheaply, and peak-rate grid power you avoid buying. Capacity beyond what your household genuinely shifts each day earns nothing, and a tiered rebate that rewards larger systems can push people past that point.
The right sequence is to work out how much energy you actually shift on a typical day first, then size the battery to that, then apply whatever rebate is available. Doing it the other way round — choosing a size because of the subsidy tier — is how households end up with capacity that never discharges.
Our is a home battery worth it works through the arithmetic, and our how to size a solar battery guide covers the cases where the answer is honestly no. If you have solar already, the free solar savings calculator is a reasonable starting point for how much surplus you currently export.
The bit most buyers miss: your plan changes too
Installing a battery changes your usage profile, sometimes dramatically. You import less at peak, you export less surplus, and your daily shape flattens. That means the plan that was cheapest for you before the battery is frequently not the plan that is cheapest after it — a high feed-in tariff matters less when you are exporting less, and peak rates matter less when you are drawing less at peak.
A household that installs a battery and leaves its plan untouched can quietly give back a meaningful share of the benefit. This is the part almost no battery quote mentions, because the installer is selling hardware, not tariffs.
EnergySorted costs every plan against your real usage and can model a declared battery, so you can see which plan suits the household you will have after installation rather than the one you had before. Compare on your real bill.
Checking a quote before you sign
Battery quotes vary widely for the same hardware, and the rebate is frequently presented as a discount the installer is granting rather than a federal certificate scheme available through any accredited supplier. Knowing the current certificate rate for the period you are installing in lets you check that the discount you are being shown is the scheme’s, not a markup with the scheme’s name on it.
Ask for the price before and after the certificate discount, the exact usable capacity (not nameplate), the warranted cycle life, and what happens to the warranty if you move house. Our federal battery rebate guide covers what a defensible quote contains.
Frequently asked questions
Is the home battery rebate ending?
Not ending, but shrinking on a schedule. Since 1 May 2026 the discount steps down every six months rather than annually, and it is tiered by battery size. The certificate rate declines from 6.8 per kilowatt-hour in the May to December 2026 period to 2.1 by 2030.
Should I install a battery now or wait for prices to fall?
It depends on whether battery prices fall faster than the subsidy does. The program is explicitly designed around falling prices, so waiting is not automatically worse. What you cannot assume is that the current discount will still be available — the step-down is scheduled, not discretionary.
How big should my home battery be?
Size it to the energy you actually shift on a typical day — stored solar you would otherwise export, plus peak grid power you avoid buying. Capacity beyond that earns nothing. A tiered rebate that rewards larger systems can push buyers past the point where extra capacity pays for itself.
Does a battery change which energy plan is cheapest for me?
Often substantially. You import less at peak and export less surplus, so a high feed-in tariff is worth less to you and peak rates matter less. The plan that was cheapest before installation is frequently not the cheapest after it, and very few battery quotes mention this.
How is the battery rebate actually paid?
Through the small-scale technology certificate mechanism, so it comes off the installed price via an accredited supplier rather than being paid to you afterwards. That is why it appears as a discount on the quote — and why it is worth asking to see the price both before and after it.