Installed cost by size
Installed battery cost is usually quoted per usable kWh, and bigger systems cost less per kWh. These bands are from industry price tracking in 2026. They are before any state incentive, and whether the federal rebate is already applied depends on the quote.
| Battery size | Installed cost | Notes |
|---|---|---|
| ~10 to 13kWh | $720 to $1,080 / kWh | The common household range. Covers a typical evening plus part of the night. |
| ~15 to 20kWh | $620 to $940 / kWh | Larger homes or higher overnight use. Cheaper per kWh than a small battery. |
| ~25 to 32kWh | $540 to $630 / kWh | Big systems. Lowest per-kWh cost, but the rebate tapers above 14kWh. |
Ranges based on Australian industry price tracking (SolarQuotes battery cost guide, updated May 2026). Indicative only, before state incentives. A new hybrid inverter, if needed, adds cost.
What that looks like in dollars
Turned into whole-system prices, industry examples in 2026 put a common household battery in a broad band from around $4,000 up to $13,000 or more installed after the federal rebate, depending heavily on the brand and your site. A popular 13.5kWh system, for instance, is often quoted around $10,000 installed including its gateway. The spread is genuinely wide, which is why a single number is misleading and a quote for your own home is the only figure worth acting on.
The federal Cheaper Home Batteries discount takes roughly 30% off the upfront cost and is usually applied by the installer at the point of sale, so the prices you are quoted often already include it. It tapers above 14kWh, which our rebate guide explains in full.
Payback: a range, not a number
With the 2026 rebate, reputable Australian sources commonly cite payback of about six to nine years in states with higher electricity prices, and shorter, closer to five to seven years, if you join a Virtual Power Plant and self-consume most of your solar. Anyone quoting a precise payback without knowing your bills is guessing.
Payback is driven by a handful of things: how much of your power you use after dark, your tariff and whether it is time-of-use, whether you already have surplus solar to charge the battery, how low your feed-in tariff has fallen, and whether you join a VPP. The lower feed-in tariffs have gone, the more a battery makes sense, because exporting solar is worth so little. Our rebate guide covers the incentive side, including state VPP incentives.
Reading a quote without getting caught out
Three checks save most of the confusion. Is the price supply-only or fully installed? Is it before or after the federal rebate? And does it include a new inverter if your setup needs one? Get quotes on a like-for-like basis and the differences between installers become real rather than an artefact of how the number was presented.
For who does the installing and what to check on credentials and warranty, see our Apollo Energy Group review, and for the full picture on the offer and process, the Apollo Energy Group guide.
Get a price for your actual home
Ranges only get you so far. Apollo Energy Group sizes a battery from your real usage and applies the federal rebate at the quote, so you see a real number for your home. You get $500 off your quote through our link, no code needed, and it commits you to nothing.
Get $500 off a quoteFrequently asked questions
How much does a home battery cost in Australia in 2026?+
Installed battery prices are commonly quoted around $600 to $1,300 per usable kWh before rebates, with bigger systems costing less per kWh. After the federal Cheaper Home Batteries discount, worked examples from industry sources put a typical 10kWh system in the several-thousand-dollar range and a 13.5kWh system around $10,000 installed, though the spread is wide depending on the brand, the inverter and your site. Always check whether a quoted price is supply-only or installed, and before or after the rebate.
Does the federal rebate reduce these prices?+
Yes. The federal Cheaper Home Batteries Program applies a point-of-sale discount of roughly 30% of the upfront cost, applied by the installer, so the prices you are quoted usually already include it. It tapers above 14kWh, which is one reason most homes are sized around that mark. Our home battery rebate guide explains exactly what it pays and how the taper works.
What is the payback period on a home battery?+
With the 2026 rebate, reputable Australian sources commonly cite payback in the range of about six to nine years in states with higher electricity prices, and sometimes shorter if you join a Virtual Power Plant and use most of your solar. It is genuinely variable, because payback depends on your usage pattern, your tariff, whether you already have solar, your feed-in rate and VPP participation. Treat any single number with caution and ask for a projection based on your own bills.
Why do battery quotes vary so much?+
Three big reasons. First, whether the price is supply-only or fully installed. Second, whether it is before or after the federal rebate. Third, whether a new hybrid inverter is needed, which adds cost. A larger battery also costs less per kWh than a small one. This is why comparing quotes on a like-for-like basis matters more than chasing the lowest headline number.
What size battery gives the best value?+
Most Australian homes are advised to size a battery to their evening and overnight usage rather than total daily use, which for a typical household lands somewhere around 10 to 14kWh usable. That range also lines up with the federal rebate, which pays the full rate only up to 14kWh, so oversizing means paying near-full price for capacity that both earns a smaller subsidy and often sits unused. A good installer sizes from your actual usage data.
Does Refer Labs sell batteries?+
No. Refer Labs is an independent comparison publisher. We explain how the costs and rebates work and link out to providers, including a disclosed affiliate link to Apollo Energy Group, which offers $500 off a quote through our link. We do not sell or install batteries and do not provide financial advice. Prices here are general information; get a quote for figures specific to your home.
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This page is published by Refer Labs, an independent comparison publisher, and contains a disclosed affiliate link to Apollo Energy Group, which means we may earn a commission if you request a quote through our link. Commissions never change what we write. Prices are researched industry ranges, indicative only and subject to change, and are not a quote. Content is general information, not financial advice. See our editorial standards.