The prices are published averages from named price surveys, not our own quotes. The surveys publish installed prices with the federal rebate already taken off, so the "after rebate" figures below are the published ones. To get the "before rebate" figures we add the federal rebate back at the 6.8 factor that applied when the surveys were taken. Every row names its source and the month its prices describe. We checked every source on 10 October 2026. Nothing here is a quote: your network, switchboard and roof decide the last thousand dollars.
Solar battery prices by size
Battery cost scales with usable capacity, but not in a straight line. In the surveys the after-rebate cost per usable kWh falls as capacity rises, from about $923 at 10 kWh to about $760 at 30 kWh. The federal rebate pays in full on the first 14 kWh only, then on 60% of each kWh up to 28 kWh, so the rebate's share of the price shrinks on bigger batteries.
| Usable capacity | Installed, before rebate | Federal rebate | After federal rebate | Source (prices dated) |
|---|---|---|---|---|
| 10 kWh | $10,480-$13,376 | −$2,696 | $7,784-$10,680 | Solar Choice Battery Price Index, August 2026 ; solarcalculator.com.au, May 2026 |
| 13.5 kWh | $14,106-$16,206 | −$3,608 | $10,498-$12,598 | solarcalculator.com.au, May 2026 |
| 20 kWh | $19,690-$20,490 | −$4,718 | $14,972-$15,772 | Solar Choice Battery Price Index, August 2026 |
| 30 kWh | $28,595-$29,195 | −$6,106 | $22,489-$23,089 | Solar Choice Battery Price Index, August 2026 |
Each band runs from the lowest to the highest published figure at that capacity. The low end is a battery added where a hybrid inverter is already in place (or bought with new panels); the high end is a battery added to an existing solar system, inverter included. The rebate column is computed from the federal factor of 6.8 certificates per usable kWh, verified 13 July 2026. Sources checked 10 October 2026. We list no 5 kWh or 15 kWh row because neither survey publishes one. State incentives come off after the federal rebate; see the state table.
- 10 kWh: Both surveys price this size. The low end is a battery added where a hybrid inverter is already in place; the high end adds a battery to existing solar, inverter included.
- 13.5 kWh: The Powerwall 3 size, and just under the 14 kWh the federal rebate pays on in full.
- 20 kWh: Above 14 kWh the federal rebate pays on only 60% of each extra kWh, so the out-of-pocket cost per kWh stops falling.
- 30 kWh: Above 28 kWh the federal rebate drops again, to 15% of each extra kWh.
10 kWh (10 kW) battery price
A search for a "10 kW battery" almost always means 10 kWh of storage. The direct answer: $10,480 to $13,376 fully installed before rebates, and $7,784 to $10,680 out of pocket once the federal Cheaper Home Batteries rebate of $2,696 is applied at the point of sale. The after-rebate figures are the published averages from Solar Choice Battery Price Index (August 2026) and solarcalculator.com.au (May 2026).
Where you land in that range depends mostly on three things:
- Whether a battery-ready inverter is already there. An all-in-one unit brings its own. A modular battery added to an older solar system needs a hybrid or battery inverter as well (the published gap at 10 kWh is $500 in Solar Choice Battery Price Index and $1,800 in solarcalculator.com.au) .
- What happens in a blackout. Whole-home backup needs a changeover gateway. Essential circuits only covers the fridge, lights and a few power points.
- Your switchboard and your network. An old board, a long cable run or a three-phase supply all add labour before a single kWh is stored.
Two checks on any 10 kWh quote. The federal rebate should be itemised as a point-of-sale discount. And if the total is well under the low end above, ask what is left out: the inverter, the backup hardware or part of the warranty. Whether 10 kWh is enough for your house is covered in how long will a 10 kWh battery last, and the models at and near this size are compared in best solar batteries compared.
Solar battery price after rebate, by state
The federal rebate is the same everywhere, so the headline price is the same in every state: a 13.5 kWh battery costs $10,498 to $12,598 after the $3,608 federal rebate. What changes by state is whether anything else can come off, and every state extra below comes with a condition.
| State | 13.5 kWh after federal rebate | State extra (conditional) | Condition |
|---|---|---|---|
| NSW | $10,498-$12,598 | Varies by capacity and provider | PDRS Virtual Power Plant connection incentive: paid for connecting the battery to a virtual power plant; the amount depends on the usable capacity you make available to the VPP (up to 28 kWh) and on the provider and contract you choose (source) |
| VIC | $10,498-$12,598 | None active | Federal rebate only |
| QLD | $10,498-$12,598 | None active | Federal rebate only |
| SA | $10,498-$12,598 | None for most households | REPS Virtual Power Plant incentive is open only to priority-group households (concession card holders and hardship customers) for the rest of 2026 |
| WA | $10,498-$12,598 | Up to $1,300 | WA Residential Battery Scheme, Synergy customers: open to Synergy customers, and the household must join a virtual power plant (source) |
| TAS | $10,498-$12,598 | None active | Federal rebate only |
| ACT | $10,498-$12,598 | None active | Federal rebate only |
| NT | $10,498-$12,598 | None active | Federal rebate only |
State programs checked against each program's own page on 10 October 2026. A state extra is never included in the headline price because it depends on who you buy power from, whether you join a virtual power plant and, in NSW, how much capacity you make available to it. Each state's battery rebate page has the eligibility rules.
The rebate falls on 1 January 2027: what that costs you
The Cheaper Home Batteries Program pays 6.8 certificates per usable kWh today. On 1 January 2027 that drops to 5.7. The same 13.5 kWh battery goes from $3,608 of federal support to $3,013, a difference of $595 on an install that is otherwise identical. The rebate is set by the date the battery is installed, not the date you sign the contract, so a job booked close to the deadline can miss it.
The full schedule, and what each step is worth in dollars, is on the Cheaper Home Batteries rebate page. To see the figure for your own address and battery size, use the rebate calculator.
Solar battery prices by brand
Published average installed prices for the batteries we track, before and after the federal rebate. Prices are for the battery plus a standard install, not a package with panels. Each row shows its source and the month its prices describe.
| Battery | Usable kWh | Installed, before rebate | After federal rebate | Per kWh, before rebate | Backup | Price source |
|---|---|---|---|---|---|---|
| Tesla Powerwall 3 | 13.5 kWh | $16,702-$17,251 | $13,094-$13,643 | $1,258 | Whole-home | Solar Choice, August 2026 ; solarcalculator.com.au, May 2026 |
| Sungrow SBR HV | 12.8 kWh | $12,250-$14,824 | $8,800-$11,374 | $1,058 | Add-on | SolarQuotes, May 2026 ; solarcalculator.com.au, May 2026 |
| BYD Battery-Box Premium HVM | 13.8 kWh | $14,009-$16,009 | $10,322-$12,322 | $1,088 | Add-on | Solar Choice, August 2026 ; solarcalculator.com.au, May 2026 |
| GoodWe Lynx Home F G2 | 12.8 kWh | $12,024-$14,024 | $8,574-$10,574 | $1,018 | Add-on | solarcalculator.com.au, May 2026 |
| Sigenergy SigenStor | 15.6 kWh | $15,973-$17,973 | $11,968-$13,968 | $1,088 | Whole-home | Solar Choice, August 2026 ; solarcalculator.com.au, May 2026 |
| sonnenBatterie Evo | 10 kWh | $14,076-$15,876 | $11,380-$13,180 | $1,498 | Add-on | solarcalculator.com.au, May 2026 |
| Alpha ESS SMILE5 | 13.3 kWh | $12,817-$14,817 | $9,248-$11,248 | $1,039 | Whole-home | solarcalculator.com.au, May 2026 |
| Fox ESS EQ4800 (~10 kWh) | 10 kWh | $9,500-$11,000 | $6,804-$8,304 | $1,025 | Add-on | Isolux Solar, May 2026 |
Survey figures already include the federal rebate; the before-rebate column adds it back at the 6.8 factor in force when the prices were collected. Fox ESS EQ4800 (~10 kWh) is the exception: its source publishes a range before rebates. Where a survey publishes a brand average rather than a named model, the row uses the capacity the survey states. "Per kWh" is the midpoint of the before-rebate band divided by usable capacity. Every battery listed uses LFP chemistry. Sources checked 10 October 2026. Growatt APX is no longer listed because we could not find a published installed price that states which side of the rebate it sits.
Warranty, backup and inverter detail for each one is in best solar batteries compared.
What actually moves the price
- Usable capacity. The biggest single factor, and the one the rebate is calculated on.
- Integrated versus separate inverter. All-in-one units include it; modular stacks may need one added.
- Backup scope. Whole-home changeover costs more than an essential-circuits sub-board.
- Install complexity. Switchboard upgrades, long cable runs and three-phase supplies add labour.
- Brand. Across the batteries in our table the published averages run from $1,018 to $1,498 per usable kWh before the rebate.
- Timing. The federal factor steps down on a published schedule, which moves the net price without anything on the roof changing.
Common questions about solar battery cost
How much does a solar battery usually cost?
A 10 kWh battery costs $10,480 to $13,376 fully installed before the federal rebate, and $7,784 to $10,680 after it. A 13.5 kWh battery costs $14,106 to $16,206 before and $10,498 to $12,598 after. The federal Cheaper Home Batteries rebate is worth about $270 per usable kWh on the first 14 kWh at today's certificate price. Prices from Solar Choice Battery Price Index (August 2026) and solarcalculator.com.au (May 2026), checked 10 October 2026.
How much does a 10 kWh solar battery cost in Australia?
$10,480 to $13,376 fully installed before rebates. The federal rebate takes $2,696 off at the current factor of 6.8 certificates per usable kWh, leaving $7,784 to $10,680. The low end is a battery added where a hybrid inverter is already in place; the high end adds one to an existing solar system. A state incentive can come off after that in NSW and WA, with conditions (see the state table).
How much does a 13.5 kWh solar battery cost?
$14,106 to $16,206 fully installed before rebates, $10,498 to $12,598 after the $3,608 federal rebate. The Tesla Powerwall 3, the best-known battery at this size, has higher published averages: $13,094 to $13,643 after the rebate.
Is there such a thing as a 10 kW solar battery?
Not really, and the difference matters when you read a quote. Batteries are sold on energy (kWh, how much they store) and power (kW, how fast they can charge or discharge). A search for a "10 kW battery" almost always means 10 kWh of storage. The battery's continuous power rating, in kW on its datasheet, is what decides whether it can run an oven and an air conditioner at the same time in a blackout.
Is 10 kWh enough to run a house?
For an evening, usually: a full 10 kWh battery runs a steady 1 kW load for about 10 hours and a 2 kW load for about 5, less with heating, cooling or an oven on. Runtime by load, and how long the battery itself lasts, are in our guide, how long will a 10 kWh battery last.
How much does it cost to add a battery to existing solar?
More than a battery bought with new panels, because an older solar inverter usually cannot charge a battery and a hybrid or battery inverter has to go in too. At 10 kWh the published averages put that extra at $500 (Solar Choice Battery Price Index) to $1,800 (solarcalculator.com.au). All-in-one batteries with the inverter built in avoid it.
How much is a battery for a 6.6 kW solar system?
A 6.6 kW system makes about 26 kWh on an average day, which comfortably charges a 10 kWh battery on top of daytime use. That battery costs $10,480 to $13,376 installed, $7,784 to $10,680 after the federal rebate.
How many solar panels do I need to charge a 10 kWh battery?
About 6 panels, on top of whatever the house uses during the day. At 440 W each that is roughly 2.6 kW of array, which produces around 10 kWh on an average Australian day. In practice installers size the array for daytime household load first and the battery second, which is why a 10 kWh battery is normally quoted next to a 6.6 kW system of 15 panels.
How long will a 10 kWh battery last?
Through an evening, divide usable kWh by your load: about 10 hours at 1 kW and 5 at 2 kW. Over its life, every battery in our price table carries a 10-year warranty, some ending earlier at a cycle or throughput cap; the detail is in our guide, how long will a 10 kWh battery last.
Is it worth getting a battery for solar panels?
It depends on what an exported kWh earns you and how much power you use after dark: NSW, VIC, SA and ACT set no legal minimum feed-in tariff, so storing solar instead of exporting it is worth more there, and a household that is busy in the evening gets the most from a battery. Payback by state, with every assumption printed, is in our guide, is a solar battery worth it.
Which home battery is the best value in Australia?
On installed cost per usable kWh the GoodWe Lynx Home F G2 has the lowest published average in our table, about $1,018 per kWh before the rebate, against $1,498 for the sonnenBatterie Evo. Cheapest per kWh is not the only test: warranty terms, backup and whether the inverter is built in all differ, and our best solar batteries compared page sets them side by side.
Is the solar battery rebate reducing in 2026?
It already has once: on 1 May 2026 the factor fell from 8.4 to 6.8 certificates per usable kWh. The current rate of 6.8 holds for batteries installed up to 31 December 2026, then drops to 5.7 on 1 January 2027. On a 13.5 kWh battery that is a fall from $3,608 to $3,013, $595 less off the same install. The schedule then steps down every 1 January and 1 July to 2030. Rebate figures verified 13 July 2026.
Get the price for your address
Every figure above is a national planning range. Your quote depends on your switchboard, your network and which battery your roof and inverter suit. Tell us the address and the bill, and we match you with one installer we have checked against the ABN record: one quote, no call-centre bidding.