The short answer: after the federal Cheaper Home Batteries discount, most Australian households pay around $7,000 to $10,000 fully installed for a typical 10kWh solar battery, with the exact price driven by capacity, brand, backup capability and your state's incentives.
Solar battery prices by size
Battery cost scales mostly with usable capacity (kWh). Here's what Australian households typically pay after the federal discount, fully installed. These are indicative ranges, and your free rebate check returns a figure specific to your postcode and setup.
| Battery size | Suits | Indicative installed (after rebate) |
|---|---|---|
| 5 kWh | Smaller homes, modest evening use | $4,000 to $6,000 |
| 10 kWh | Typical family home (most popular) | $7,000 to $10,000 |
| 13.5 kWh | High evening use, some backup | $10,000 to $13,000 |
| 16 kWh+ | Large homes, whole-home backup | $13,000 to $16,000+ |
As a rough rule of thumb, installed battery storage works out to about $800 to $1,300 per usable kWh after the federal discount, and bigger systems usually cost a little less per kWh. Note that battery size is measured in kWh (how much energy it stores), not kW, so a "10kW battery" almost always means a 10kWh one.
What drives the cost of a solar battery?
- Usable capacity (kWh): the single biggest factor. More storage to run more of your home overnight costs more.
- Brand and chemistry: premium brands like Tesla, Sungrow and Enphase sit higher, value brands lower. Most are lithium-based with 10-year warranties. See how the main battery brands compare.
- Backup capability: keeping the house running through a blackout needs a backup gateway, which adds hardware and labour.
- Inverter setup: if your existing solar inverter isn't battery-ready, you may need a hybrid inverter or an AC-coupled battery.
- Install complexity: switchboard upgrades, meter changes and difficult access all add to the labour.
How rebates change the price
The federal Cheaper Home Batteries discount knocks roughly 30% off the upfront price, applied by your installer at the point of sale, so you simply pay less, rather than claiming it back later. On top of that, most states add their own incentive, which can take the price down further:
- NSW & QLD: extra payments for connecting to an approved Virtual Power Plant.
- VIC, ACT & TAS: interest-free loans to spread the remaining cost.
- WA & SA: direct state battery rebates on top of the federal discount.
See exactly what stacks in your state on our solar battery rebate pages.
Is it worth the cost?
For most homes with solar, a battery pays for itself in roughly 3 to 5 years, then keeps saving for the rest of its 10-year-plus life, faster again if you have high evening usage or join a VPP. We break down the full picture in are solar batteries worth it?