Solar battery cost calculator for Australia
See what a home battery could cost after federal and state rebates, then your recommended size, savings and payback - on screen in under a minute, no email wall. If you are comparing late 2026 vs 2027 install dates, toggle install year in the calculator - the step-down is about $407 on 10 kWh and about $549 on 13.5 kWh in our model.
Cheaper Home Batteries Program guide - worked STC maths, eligibility and quote red flags before you sign.
- Federal + state rebates stacked
- Net cost, savings and payback
- Sources and as-of date shown
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A few quick questions - no email required to see your result.
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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.
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.
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 ยท See methodology
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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.
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.
Typical solar battery costs in Australia
Most homes pay about $7,500 to $17,000 installed before rebates. After the federal Cheaper Home Batteries Program, many land closer to $5,500 to $12,000. A common 10 kWh system often nets around $6,484-$11,484 before any state incentive. The federal STC factor steps down from 1 January 2027 - model 2026 vs 2027 in the calculator if timing is open.
Full solar battery cost guide for 2026 - prices by size and model
Solar battery cost by state
State and territory rebate rules change net cost. Pick your location for a tailored guide and calculator.
Solar battery guides
Longer explainers on the federal program, sizing, payback and state differences - written to be useful before you request quotes.
- Cheaper Home Batteries Program explainedAustralia's federal battery discount is delivered through STCs at point of sale - not a cheque you claim later. This guide explains worked rebate maths by size, eligibility edge cases, 2026 vs 2027 timing, state stacking and quote red flags so you can compare installer numbers fairly.
- Add a battery to existing solarMost Australian homes with solar can add storage without replacing the whole system. This guide explains AC vs DC retrofit paths, worked quote examples, switchboard upgrade bands, brand-specific retrofit notes for Tesla, Alpha ESS and Pylontech, net cost by state and a quote checklist so you can compare installer numbers fairly.
- Hybrid inverter upgrade costMany battery quotes include a hybrid inverter swap, not just the battery cabinet. This guide explains typical hybrid inverter upgrade costs, switchboard extras, when DC coupling beats AC retrofit, and how to compare quotes that bundle inverter work with storage.
- What size solar battery do I need?Most homes land between about 8 and 13.5 kWh usable. This guide walks through a practical sizing method - evening load, solar match, backup goals and federal rebate taper - so you can compare neighbouring sizes before you commit to a quote.
- What actually changes solar battery paybackPayback is not a single national number. Import rates, feed-in tariffs, how much solar you already export, net cost after rebates and whether you join a VPP move the result more than brand slogans. This guide walks through the levers with worked examples you can check in our free calculator.
- State battery rebates comparedThe federal Cheaper Home Batteries Program is national. State support is not. This guide compares all eight jurisdictions with net-cost bands, stackable rebate flags and links to each state calculator page so you can model your actual net price.
- Tesla Powerwall 3 cost in AustraliaThe Powerwall 3 is a 13.5 kWh all-in-one home battery with an integrated inverter - the highest-traffic brand query on this site. This guide covers typical installed prices, worked federal rebate maths, net cost by state, backup gateway pricing, Powerwall 2 vs 3 differences, wait times, warranty and when modular stacks beat Tesla on value.
- Alpha ESS SMILE cost in AustraliaAlpha ESS SMILE is one of the most quoted modular home batteries in Australia, commonly sold at 8 and 10 kWh usable. This guide covers typical installed prices, worked federal STC maths on both sizes, net cost in every state, modular expansion toward 13.5 kWh, hybrid inverter pairing, 2026 vs 2027 timing and a quote checklist so you can compare installer numbers fairly.
- Pylontech US5000 cost in AustraliaPylontech US5000 is one of the most installed modular battery lines in Australia, sold in 4.8 kWh modules and commonly quoted as a two-module stack near 10 kWh usable. This guide covers typical installed prices, worked federal STC maths on one to three modules, net cost in every state, hybrid inverter pairing, paths toward 13.5 kWh, 2026 vs 2027 timing and a quote checklist so you can compare installer numbers fairly.
- Enphase IQ Battery cost in AustraliaEnphase IQ Battery is the premium AC-coupled storage line designed for Enphase microinverter solar homes, commonly quoted as the IQ Battery 10T at about 10.1 kWh usable. This guide covers typical installed prices, federal rebate maths, state net cost, ecosystem pairing and when IQ Battery beats or loses to Powerwall and modular stacks on value.
- sonnenBatterie cost in AustraliasonnenBatterie is a premium AC-coupled home battery line, commonly quoted as the 10 kWh class unit at about 10 kWh usable. This guide covers typical installed prices, federal rebate maths, state net cost, retrofit fit, VPP positioning and when sonnen beats or loses to Powerwall, Enphase and modular stacks on value.
- LG RESU cost in AustraliaLG RESU is a compact DC-coupled home battery line from LG Energy Solution, commonly quoted as the RESU 10H class at about 9.8 kWh usable. This guide covers typical installed prices, federal rebate maths, state net cost, hybrid inverter pairing and when RESU beats or loses to Powerwall and modular stacks on value.
- GoodWe ESA cost in AustraliaGoodWe ESA is a popular all-in-one / hybrid-class home battery in Australia, commonly quoted near 16 kWh usable. This guide covers typical installed prices, worked federal STC maths with taper above 14 kWh, net cost in every state, 8-13.5 kWh neighbour comparisons, 2026 vs 2027 timing and a quote checklist so you can compare installer numbers fairly.
- Redback Smart Hybrid cost in AustraliaRedback Technologies Smart Hybrid is a popular Australian-integrated hybrid inverter plus GEN3 battery system, commonly quoted at 7.6 kWh and 11.4 kWh usable. This guide covers typical installed prices, worked federal STC maths on both sizes, net cost in every state, modular 3.8 kWh stacking, comparison with Alpha ESS and GoodWe ESA, 2026 vs 2027 timing and a quote checklist so you can compare installer numbers fairly.
- Sigenergy battery cost in AustraliaSigenergy SigenStor is a fast-growing integrated hybrid plus battery system on Australian installer quotes, commonly sized near 7.4 kWh and 11 kWh usable from stackable modules. This guide covers typical installed prices, worked federal STC maths, net cost in every state, comparison with Sungrow SBR, Redback and Alpha ESS, 2026 vs 2027 timing and a quote checklist.
- FranklinWH battery cost in AustraliaFranklin Home Power pairs aPower LFP batteries with an aGate energy controller for whole-home backup and scalable storage. The common Australian quote is the 13.6 kWh aPower X unit with aGate. This guide covers typical installed prices, worked federal STC maths, net cost in every state, comparison with Tesla Powerwall 3 and sonnen, multi-unit stacking, 2026 vs 2027 timing and a quote checklist.
- Best home batteries in AustraliaThere is no single best battery for every home. This guide compares the ten most quoted Australian systems by job type (retrofit vs new hybrid), budget vs premium net cost, state stacking and expandability - with links to each brand cost guide and size cluster pages so you can shortlist before requesting quotes.
- Sungrow SBR battery cost in AustraliaSungrow SBR is a widely quoted modular home battery stack in Australia, commonly sold at 9.6 kWh and 12.8 kWh usable sizes. This guide covers typical installed prices, worked federal STC maths on both sizes, net cost in every state, Sungrow SH-RT hybrid pairing, paths toward 13.5 kWh class capacity, 2026 vs 2027 timing and a quote checklist so you can compare installer numbers fairly.
- BYD Battery-Box cost in AustraliaBYD Battery-Box (HVM class) is a widely installed modular battery in Australia, commonly quoted at 8.3 or 11 kWh usable. This guide covers typical installed prices, worked federal STC maths on both sizes, net cost in every state, hybrid inverter pairing, paths toward 13.5 kWh, 2026 vs 2027 timing and a quote checklist so you can compare installer numbers fairly.
- Is a home battery worth it in Australia?A home battery is worth it when evening grid imports, tariff shape and net cost after rebates line up - not because a national average says so. This guide gives a practical yes/no framework with household profiles, state context and the same levers our calculator models.
- 8 kWh battery cost after rebateEight kilowatt-hours is the most common entry size for Australian households that want storage without oversizing. This guide gives gross and net price bands, brand-level midpoints near 8 kWh, worked federal STC maths, state stacking examples, neighbour size comparisons and a quote checklist.
- 10 kWh battery cost after rebateTen kilowatt-hours is the most searched home battery size in Australia. This guide gives gross and net price bands, brand-level midpoints from our calculator catalog, worked federal STC maths, state stacking examples, 2026 vs 2027 timing and a quote checklist so you can compare apples to apples.
- 13.5 kWh battery cost after rebateThirteen point five kilowatt-hours is the standard Powerwall-class size and a common upper band for suburban evening load. This guide gives gross and net price bands, Tesla and modular neighbour paths, worked federal STC maths, state stacking examples, 10 vs 13.5 kWh comparisons and a quote checklist.
- Off-grid solar battery AustraliaMost Australian homes on the grid should choose a hybrid battery that keeps the connection and cuts evening imports. True off-grid is for sites without practical grid access or where connection costs dominate. This guide explains NEM vs off-grid, typical kWh and solar sizing bands, federal rebate edge cases, when hybrid wins, remote cost drivers and what to verify on quotes.
- Virtual power plant (VPP) guideA virtual power plant lets your battery join a fleet that the grid can call on for exports or demand response. In Australia, VPPs can unlock one-off connection incentives, ongoing credits, or mandatory scheme rules - especially in NSW and WA. This guide explains how they work, what they pay, and what to check before you sign up.
How it works
Three quick steps from your bill to a battery decision you can trust.
Tell us about your home
Pick your state, enter your quarterly bill or daily usage, and tell us whether you already have solar and how much you want to back up.
See your number in under a minute
We recommend a battery size and apply the federal rebate plus your state incentive to show net cost, annual savings and payback - no email needed.
Read the guides, then decide
Use the cost guide, methodology and editorial explainers to understand rebates, sizing and payback before you speak to an installer.
Why you can trust these numbers
Most calculators hide your result behind an email form or skip the state rebate detail. We do the opposite: accurate rebate-stacking, shown instantly, with our working in the open.
Rebate-stacking accuracy
We combine the federal Cheaper Home Batteries Program (STC-based, tapered for larger systems) with the specific scheme in your state or territory - so the net cost reflects every rebate you can actually claim.
Sourced and dated
Every figure shows the official source and the date it was last verified (rebate data as of September 2026). When programs change - including the federal step-down on 1 January 2027 - we update the model.
Published methodology
Results are instant and free. Sizing, rebate stacking, savings and payback assumptions are written up on our methodology page so you can check the working yourself.
Frequently asked questions
How much does a solar battery cost in Australia?
Most home batteries cost about $7,500 to $17,000 installed before rebates in 2026. After the federal Cheaper Home Batteries Program, many households pay closer to $5,500 to $12,000 depending on size and brand. See our solar battery cost guide for price tables by size and model, then use the calculator above for a personalised net cost.
How much is the federal battery rebate in 2026?
The federal Cheaper Home Batteries Program discounts roughly $251.60 per usable kWh of battery capacity from May to December 2026, delivered as small-scale technology certificates (STCs) and applied by your installer at the point of sale. The value tapers for larger systems and steps down again on 1 January 2027, so the sooner you install the larger the discount. Read our Cheaper Home Batteries Program guide for taper rules and eligibility basics.
Which Australian states still have battery rebates in 2026?
Western Australia (Residential Battery Scheme, from $1,300) still offers an upfront state rebate that stacks with the federal program. New South Wales offers a one-off VPP incentive plus a zero-interest loan. Victoria, Queensland, South Australia and the Northern Territory have closed their state battery rebates, so you receive the federal rebate only. The ACT and Tasmania offer interest-free loans rather than upfront rebates. See our state rebate comparison guide and VPP guide for current rules by jurisdiction.
How big a home battery do I need?
Most Australian homes land between 10 and 20 kWh of usable storage. The right size depends on your daily electricity use, whether you already have solar, and how much of the home you want to back up during an outage. Read our battery sizing guide or enter your details above and the calculator recommends a size in under a minute.
Is a home battery worth it in Australia?
With the federal rebate plus any state incentive, payback periods have shortened considerably. Whether a battery pays for itself depends on your electricity rate, usage pattern, existing solar and the rebates available in your state. Read our home battery worth-it guide or use the calculator above for your estimated net cost, annual savings and payback period.
Do I need to give my email to see the result?
No. The full result - battery size, rebates, net cost, savings and payback - is shown on screen in under a minute with no email required.
How accurate are the rebate figures?
We model the current federal Cheaper Home Batteries Program plus each state and territory scheme, and we show the date the figures were last verified along with links to the official sources. See our methodology page for the full assumption list. Results are estimates for guidance only - confirm your exact eligibility and pricing with an accredited installer.