Is a home battery worth it in Australia? (2026)

The short answer

For some homes, yes. For others, not yet. The government's energy advice site says it plainly: for many homes the cost of a battery may outweigh the financial benefits, and the savings may not cover it within its warranty period. So it depends on your house, and you can work it out with a few numbers from your bill and one from your quote.

What a battery actually earns

Without a battery, the solar you do not use during the day goes out to the grid. Your retailer pays you a feed-in tariff for it: a credit per kilowatt hour (kWh, the unit on your bill). Then in the evening, when the panels stop, you buy power back at the full retail rate.

A battery keeps that spare solar and uses it in the evening instead. So for every kWh it covers, you save:

That gap is the whole business case. If you pay 40 cents in the evening and get 2 cents for exports, each kWh you shift is worth about 38 cents. If you pay 27 cents and get 6 cents, it is worth about 21 cents. Same battery, very different result.

Two smaller things chip away at it. Batteries lose a little energy going in and out, typically about 10% for the lithium-ion batteries sold today, so you need to store about 11 kWh to get 10 kWh back. And a battery only saves money on days it actually fills up, which is fewer days in winter.

The optional extras

On top of those everyday savings, some batteries can earn more:

• Wholesale plans. On a plan that passes through the live market price, a battery can sell into short evening price spikes. We explain how in Wholesale electricity plans, explained simply.
• Virtual power plants (VPPs). A VPP is a program where a company coordinates many home batteries and pays you, in credits or a fee, for using some of yours at busy times. Every on-grid battery that gets the federal rebate must be able to join one, but you do not have to. More in Virtual power plants, explained.

These vary from year to year, so treat them as a bonus, not the reason the numbers add up.

What it costs

The number that matters is the price on your written quote after the federal rebate. Under the Cheaper Home Batteries Program the rebate usually comes off your invoice, though some sellers pay it as a rebate after installation. Since 1 May 2026 it is tiered by battery size, and it is set to step down every six months until 2030. We cover how it is worked out in The 2026 home battery rebate, explained. It is also worth checking whether your state runs its own program on top.

Anyone selling you a battery under the program must also give you a written statement of the expected payback period, energy benefits and cost savings. Ask for it, and ask what assumptions sit behind it.

A worked payback example

This is illustrative only, not a quote and not a promise. Plug in your own numbers.

A household is on a time-of-use plan: one price at peak times and a cheaper price overnight. They have a battery with about 13 kWh usable, and solar big enough to fill it on most days.

• Peak rate (4pm to 9pm): 40c per kWh
• Off-peak rate (overnight): 22c per kWh
• Feed-in tariff: 2c per kWh
• What the battery covers each evening: 6 kWh during the peak, 4 kWh overnight, so 10 kWh in total
• Days a year it runs at full value: 300 (it will not fill completely on some grey winter days)
• Price after the rebate: $9,000
• Battery warranty: 10 years

Step 1, savings per day. 6 kWh times $0.40 is $2.40. 4 kWh times $0.22 is $0.88. Together, $3.28.

Step 2, feed-in given up per day. To deliver 10 kWh it stores about 11 kWh of solar that would have been exported. 11 times $0.02 is $0.22.

Step 3, net per day. $3.28 minus $0.22 is $3.06.

Step 4, per year. $3.06 times 300 days is about $918.

Step 5, simple payback. $9,000 divided by $918 is about 9.8 years.

That is just inside the 10-year warranty in this example, so this home is on the edge. Now change two numbers. Put the same home on a flat rate of 27c all day with a 5c feed-in tariff:

• 10 kWh times $0.27 is $2.70 a day saved.
• 11 kWh times $0.05 is $0.55 a day given up.
• $2.15 a day, times 300, is $645 a year.
• $9,000 divided by $645 is about 14 years, past the warranty.

Same battery, same house, and the answer flips from "maybe" to "probably not on bill savings alone". That is why your tariff matters as much as the battery.

What makes a battery better or worse value

• Evening and overnight usage. The more you use after dark, the more the battery can replace. How big a home battery do you need? shows how to find your number.
• Your retail rate. A higher evening rate makes each stored kWh worth more. On the 2026-27 Victorian Default Offer, for example, the peak rate (4pm to 9pm) ranges from about 38c to 48c per kWh depending on your network area, while the flat rate ranges from about 26c to 32c.
• Your feed-in tariff. The lower it is, the less you give up by storing solar. Feed-in tariffs are low, and in places falling. In Victoria there has been no regulated minimum since 1 July 2025, and retailers can pay as little as zero. In NSW, the pricing regulator IPART's guide range for 2026-27 is 3.4c to 6.5c per kWh, down from 4.8c to 7.3c the year before. Our guide to solar feed-in tariffs in 2026 goes further.
• Solar size. A battery only saves money if your panels have spare energy to fill it. The government's advice is that it does not make sense to add one to a small solar system. If you already have solar, see Adding a battery to existing solar.
• Tariff type. Time-of-use plans, with a pricey evening peak, usually favour a battery over a flat rate. In NSW, South Australia and South East Queensland, the government's optional Solar Sharer Offer, available since 1 July 2026, gives eligible households with a smart meter 3 hours of free power in the middle of the day, up to 24 kWh, and the government suggests charging a home battery in that window. Compare its rates outside the free window with your current plan before you switch.
• Blackout value. Not every battery keeps the lights on in a power cut. It has to be set up to do it. If backup matters to you, that is real value the payback maths does not count. See Solar battery blackout backup.

Who should not buy one yet

A battery is probably not the right move yet if:

• Your evening use is small. If you use only a few kWh after dark, there is little for a battery to replace.
• Your solar is small or shaded. If the panels barely cover the day, there is nothing left to store.
• You are on a generous feed-in tariff. If you still get a high rate for exports from an older scheme or plan, exporting may beat storing while it lasts. Check when yours ends.
• You expect to move within a few years. A battery is bolted to the house. You may not recover its value in the sale price.
• Your payback runs past the warranty on bill savings alone, and you are not interested in backup or a wholesale plan.
• You would need to stretch your finances. A battery is a long-term purchase. Savings are estimates, and rates and feed-in tariffs can change.

Waiting is a sensible choice. The rebate steps down every six months, so waiting has a cost, but buying something that does not suit your home costs more.

Work out your own number

The quickest way to test your home is the savings calculator, which takes about a minute. For a proper answer, check your eligibility and we will design and quote a system from your actual usage, show the rebate as a line on the quote, and set out the payback assumptions so you can check them. Installation is arranged through accredited installers. Savings figures are modelled estimates, not guarantees.