Australia - Updated September 2026

Solar battery cost in Australia (2026)

A home solar battery in Australia typically costs $7,500 to $17,000 installed before rebates. After the federal Cheaper Home Batteries Program (about $252/kWh on the first 14 kWh), many households pay closer to $5,500 to $12,000, depending on size, brand and site work.

Example: a common 10 kWh install is often about $9,000-$14,000 before rebates. With a federal discount around $2,516, indicative net cost is roughly $6,484-$11,484 before any state incentive.

1 January 2027 STC step-down: the federal discount on the same battery size is about $407 lower on 10 kWh and about $549 lower on 13.5 kWh in our model. Figures on this page use the May to December 2026 STC factor. Use the homepage calculator to compare 2026 vs 2027 install years, or read the Cheaper Home Batteries Program guide for worked maths and eligibility.

Indicative Australian home battery cost after federal rebate, shown as a planning summary graphic — Planning graphic: use the size and model tables below, then run the calculator for a personalised net cost and payback.

Solar battery prices by size (indicative)

Ranges are typical residential installs in AUD. Federal rebate uses the May- December 2026 STC factor. State rebates (for example WA) can reduce net cost further. For deeper size-specific context, see our 8 kWh and 10 kWh and 13.5 kWh battery cost guides.

Indicative solar battery installed prices by usable size before and after the federal rebate
Usable size	Installed (before rebate)	Federal rebate	Indicative net
5 kWh	$5,500 - $8,500	$1,258	$4,242 - $7,242
8 kWh	$8,000 - $11,500	$2,013	$5,987 - $9,487
10 kWh	$9,000 - $14,000	$2,516	$6,484 - $11,484
13.5 kWh	$12,500 - $17,000	$3,397	$9,103 - $13,603
20 kWh	$16,000 - $24,000	$4,428	$11,572 - $19,572

Popular battery models (indicative midpoints)

Midpoints from our calculator catalog. Real quotes vary; use them to compare relative sizing and rebate impact. For a ranked comparison by use case, see our best home batteries guide.

Indicative midpoints for popular Australian home battery models before and after the federal rebate
Model	Usable kWh	Installed mid	After federal
Alpha ESS SMILE (8 kWh)	8	$9,200	$7,187
LG RESU (10H class)	9.8	$12,500	$10,034
sonnenBatterie 10	10	$15,500	$12,984
Alpha ESS SMILE	10	$11,500	$8,984
Pylontech US5000 stack	10	$10,500	$7,984
Enphase IQ Battery (10T)	10.1	$16,500	$13,959
BYD Battery-Box HVM	11	$12,000	$9,232
Sungrow SBR	12.8	$12,500	$9,280
Tesla Powerwall 3	13.5	$14,500	$11,103
GoodWe ESA (~16 kWh)	16	$14,000	$10,176

What drives the final solar battery cost?

Usable capacity - larger batteries cost more upfront; federal rebate tapers above 14 kWh.
Brand and coupling - AC-coupled systems like the Tesla Powerwall 3 can cost more per kWh; modular DC stacks are often cheaper. See our home battery comparison guide for value vs retrofit picks.
Inverter and site work - hybrid inverter upgrade, switchboard changes and backup hardware add cost. Hybrid inverter costs and retrofit paths explain when AC-coupled batteries avoid a full inverter swap.
Rebates and loans - federal discount is national; WA still stacks a state rebate; some states offer loans instead.
Your rates - payback depends on import rate vs feed-in tariff more than headline $/kWh alone.

Calculate your solar battery cost and payback

Enter your bill or usage, solar size and state. See recommended size, federal and state rebates, net cost, savings and payback - no email required.

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Your details

A few quick questions - no email required to see your result.

Your state or territory

Required - rebate stacking depends on your state.

Include NSW VPP connection incentive (~$800, only if I join an eligible VPP)Off by default. Not a state install rebate. Confirm eligibility with your retailer before you count it.

How do you want to estimate usage?

Average quarterly electricity bill ($ AUD)

Do you already have solar panels?

Battery shoppers usually already have panels. We default to Yes; switch if you are planning solar with the battery.

Your quarterly bill is treated as grid spend after existing solar when you choose Yes, and as total household usage when you choose No solar yet. Switching that answer can change inferred daily kWh and savings.

Existing solar system size

Larger solar usually means more excess power to charge the battery and shorter payback.

When do you plan to install?

The federal rebate steps down from 1 January 2027.

More options (mode, rates, extra inputs)

Calculator mode

We search generic sizes (5-100 kWh) and catalog stacks for the shortest estimated payback.

Electricity rate ($/kWh)

Default 0.30. For time-of-use, enter your average or peak rate.

Feed-in tariff ($/kWh)

Default 0.05 (5c). What your retailer pays for exported solar.

Your electricity plan type

Hit a target bill

I want my yearly grid energy cost under ($ AUD)

Used for Hit a target bill. Energy portion only at your rate (not supply charges). Try $0 for minimum grid use, or e.g. $400/yr (~$100 per quarter).

Explore options

Choose a battery system (optional)

Used for Explore options. If you pick a system, we use its usable kWh per unit times the count above. Costs vary by installer and site.

How much do you want to back up?

Sets the suggested battery size in Explore when you have not picked a specific system above.

Compare outcomes

Best estimated payback: 8.2 years at GoodWe ESA (~16 kWh) (16 kWh).

Best payback configuration

GoodWe ESA (~16 kWh)

16kWh

Estimated annual electricity cost (energy at your rate)

Before battery

$1,604

/yr

After battery

$115

/yr

Bill drop: $1,489/yr ($1,604 - $115)

Payback uses $1,241/yr modelled savings, not the full bill drop. Storing solar means you forgo about $248/yr of feed-in tariff on that energy.

Gross installed cost$14,000

Federal rebate (install 2026)- $3,824

NSW state battery install rebate is suspended (the federal rebate is larger and cannot be stacked with it). A one-off VPP connection incentive is available only if you join an eligible VPP - it is not included in net cost unless you opt in.

Estimated net cost$10,176

Installing in 2027 instead would reduce your federal rebate by about $619.

Simple payback period

8.2 years

Optimal payback is based on this calculator's inputs and assumptions only (usage, solar size, tariffs, rebate rules, and indicative installed costs). Real-world payback varies with installer quotes, site conditions, and how you use power. This is an estimate, not a guarantee.

These are estimates. The next step is real installer pricing for your home.

Estimates updated July 2026 · See methodology

What to do next

You already have the full numbers above - keep a copy or dig deeper. No email required.

Email me this estimate (optional)

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Open email app

Opens your default mail app (Mail, Outlook, Thunderbird, and so on) with the estimate filled in. We also copy the full summary so you can paste it if the app truncates.

Prefer the browser? Gmail / Outlook on the web.

Compare quotes fairly

Take this to installers so you compare like-for-like, not just the headline price.

1Usable kWh (not nameplate)Compare like-for-like usable capacity. Marketing peak or nameplate figures can differ from what you actually get to cycle each day.
2Gross price vs rebates, itemisedAsk for the installed price before rebates, then the federal STC discount and any state rebate shown as separate lines - not a single 'after rebate' number.
3Backup scopeConfirm whether backup covers the whole home or essential circuits only, and whether the backup gateway / switchboard work is included in the price.
4Commissioning date / STC yearThe federal discount steps down from 1 January 2027. Check which STC year the quote assumes, since a later commissioning date can reduce the rebate.
5State incentive eligibilityCheck any state scheme you may qualify for (for example the WA Residential Battery Scheme, or NSW VPP incentives and interest-free loans) and whether the quote accounts for it.

Read the guide

Full breakdown, long-term savings and assumptions

Cumulative energy savings (simple estimate)

Based on modelled battery savings used for payback ($1,241/yr). No inflation or battery degradation applied.

$12,410

10 years

$18,615

15 years

$24,820

20 years

NSW Home Energy Saver zero-interest loan up to $15,000 may be available (financing, not a rebate).

How we calculated this

Estimated daily usage: 24.4 kWh (implied household load from a $400 quarterly bill after existing solar at $0.30/kWh).
Battery selected: GoodWe ESA (~16 kWh) (16 kWh usable). Indicative installed cost before rebates.
Installed cost uses an indicative midpoint for the selected system (before rebates).
Federal rebate uses STC factor 6.8 (install in 2026). From 1 Jan 2027 the factor drops to 5.7.
Flat-rate plan: import at $0.30/kWh, feed-in at $0.05/kWh.
Battery savings use the gap between import and feed-in (~$0.25/kWh) on solar stored instead of exported.
Savings assume about 85% of battery capacity can be cycled when excess solar is available.
Before battery: ~14.7 kWh/day grid imports (solar offsets ~9.8 kWh/day of daytime use).
After battery: ~1.1 kWh/day grid imports (13.6 kWh/day stored solar used overnight).
Annual bill before/after is the energy portion at your import rate (supply charges not included).
Bill drop (before minus after grid energy cost): ~$1489/yr.
Modelled battery savings used for payback: ~$1241/yr (shifted solar at import minus feed-in, never more than the bill drop).
NSW state battery install rebate is suspended (the federal rebate is larger and cannot be stacked with it). A one-off VPP connection incentive is available only if you join an eligible VPP - it is not included in net cost unless you opt in.
NSW VPP connection incentive is not included (opt in on the form only if you will join an eligible VPP).
Existing 6.6 kW solar: ~27.7 kWh/day generation, ~18 kWh/day excess after ~9.8 kWh daytime use.

Full write-up: methodology and assumptions.

Rebate data as of July 2026. Sources: [1], [2]. Confirm eligibility and pricing with an accredited installer.

Solar battery cost FAQs

How much does a solar battery cost in Australia in 2026?

Most home batteries cost about $7,500 to $17,000 installed before rebates, or roughly $800 to $1,300 per usable kWh. After the federal Cheaper Home Batteries Program, many households pay closer to $5,500 to $12,000 depending on size, brand and site work.

How much does a 10 kWh solar battery cost after rebate?

A typical 10 kWh system is often about $9,000 to $14,000 installed before rebates. With the May to December 2026 federal discount (about $252/kWh on the first 14 kWh), the federal rebate on 10 kWh is roughly $2516, so net cost commonly lands around $6,500 to $11,500 before any state incentives. See our 10 kWh battery cost guide for size-specific ranges and WA stacking examples.

How much does an 8 kWh solar battery cost after rebate?

A typical 8 kWh system is often about $8,000 to $11,500 installed before rebates. With the May to December 2026 federal discount (about $252/kWh on the first 14 kWh), the federal rebate on 8 kWh is roughly $2013, so net cost commonly lands around $5,980 to $9,480 before any state incentives. See our 8 kWh battery cost guide for entry-size bands and Alpha ESS pricing.

How much does a 13.5 kWh solar battery cost after rebate?

A typical 13.5 kWh system is often about $12,500 to $17,000 installed before rebates. With the May to December 2026 federal discount (about $252/kWh on the first 14 kWh), the federal rebate on 13.5 kWh is roughly $3397, so net cost commonly lands around $9,100 to $13,600 before any state incentives. See our 13.5 kWh battery cost guide for Powerwall-class bands and modular 12.8 kWh alternatives.

How much does the federal battery rebate reduce the cost?

From May to December 2026 the federal program uses STC factor 6.8 at about $37 per STC (about $252/kWh on the first 14 kWh), tapering for larger systems. Your installer applies this as a point-of-sale discount. The STC factor steps down again from 1 January 2027. Read our Cheaper Home Batteries Program guide for taper rules and eligibility basics.

Does every state have its own battery rebate?

No. Western Australia still offers a stackable state rebate. NSW models a VPP connection incentive. Many other states have closed upfront rebates and rely on the federal program, with some offering loans instead. Check our state rebate comparison guide and VPP guide for current rules.

What size battery should I buy?

Most smaller Australian homes land between 8 and 13.5 kWh usable. The right size depends on evening use, solar size, electricity rate and feed-in tariff. Read our battery sizing guide or use the free calculator to compare suggested size and best payback for your inputs.

Are these prices exact quotes?

No. Figures on this page are indicative midpoints and ranges for Australian residential installs. Final pricing varies by installer, inverter compatibility, switchboard work and location. Use the calculator for a personalised estimate, then get real installer quotes.

Learn more before you buy

Read our guides on the federal Cheaper Home Batteries Program, sizing, payback and state rebate differences.

Browse all solar battery guides