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Cost · Solar & batteries

Home battery cost in Australia

The short answer

The federal Cheaper Home Batteries Program targets around a 30% discount on batteries from 5 kWh to 100 kWh, with the certificate factor tapering above 14 kWh since 1 May 2026.

Checked against 4 published sources, listed in full at the end of this page. How we source this

Why we don’t publish a “typical range”

The discount is delivered through certificates whose dollar value moves with the market, so even the support side has no fixed figure, only published rules. Installed battery prices themselves have no public index. Treat any specific dollar amount in an advertisement as an estimate rather than a published rate.

What is actually published

Figures below are published by a named authority and each links to its source. They are current as at .

Target discountAround 30% of upfront cost
For eligible small-scale battery systems from 5 kWh to 100 kWh, delivered through Small-scale Technology Certificates.Source: Department of Climate Change, Energy, the Environment and Water · Cheaper Home Batteries Program ↗
Certificate factor, 0 to 14 kWh100%
Full factor applied to the first 14 kWh of installed capacity. Effective 1 May 2026.Source: Department of Climate Change, Energy, the Environment and Water · Cheaper Home Batteries Program ↗
Certificate factor, above 14 up to 28 kWh60%
Reduced factor on capacity in this band.Source: Department of Climate Change, Energy, the Environment and Water · Cheaper Home Batteries Program ↗
Certificate factor, above 28 up to 50 kWh15%
Further reduced factor, concentrating support on household-scale systems.Source: Department of Climate Change, Energy, the Environment and Water · Cheaper Home Batteries Program ↗
Program fundingEstimated $7.2 billion over four years
Expanded from an estimated $2.3 billion, announced 13 December 2025.Source: Department of Climate Change, Energy, the Environment and Water · Cheaper Home Batteries Program ↗

What actually moves the price

Use these to read the quote in front of you and to ask the questions that make competing quotes comparable.

  • Usable capacity in kWh. The main determinant, and the thing the federal tiers are calculated on.
  • Whether it is AC-coupled to existing solar or DC-coupled as part of a new system.
  • Backup capability. A battery that keeps the house running in an outage needs additional switchgear and costs more than one that does not.
  • Switchboard and metering work required.
  • Mounting location, indoor, outdoor, garage, and the clearances required.
  • Brand and warranty term, which vary widely for similar nameplate capacity.

The tapering structure introduced on 1 May 2026 is the most important thing to understand before sizing a battery, because it changes the economics of going large. Capacity beyond 14 kWh attracts a materially smaller discount, and capacity beyond 28 kWh attracts very little.

Sources

Every source below was fetched and its response recorded on the date shown. Where a government site blocks automated clients, that is noted rather than reported as a successful check.

  1. Cheaper Home Batteries Program · Department of Climate Change, Energy, the Environment and WaterChecked 2026-08-10 · responded 200 OK
  2. Cheaper Home Batteries Program · energy.gov.auChecked 2026-08-10 · responded 200 OK
  3. Clean Energy Regulator · Clean Energy RegulatorChecked 2026-08-10 · responded 200 OK
  4. Solar PV and batteries · energy.gov.auChecked 2026-08-10 · responded 200 OK

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