Key points
- Typical 2026 installed prices are roughly $700–$1,300 per usable kWh before the federal discount. The range is wide and bigger batteries cost less per kWh.
- Until 31 December 2026 the federal discount is worth about $2,500–$2,700 on a 10 kWh battery, $3,400–$3,700 on 13.5 kWh and about $4,400 on 20 kWh.
- After the discount, published 2026 examples for 10–16 kWh batteries sit around $9,800–$10,800 installed, and about $14,000 for 25.6 kWh.
- Extras such as a new hybrid inverter (~$3,000+), three-phase equipment or a long cable run can add thousands.
- The discount drops by about 16% on 1 January 2027.
The solar battery cost for a typical Australian home in 2026 is roughly $700 to $1,300 per usable kilowatt-hour (kWh) installed, before the federal Cheaper Home Batteries discount. Once the discount comes off, most mid-sized batteries of 10–16 kWh land around $10,000 installed, though quotes vary widely with the brand, your existing inverter and your switchboard. Here’s what drives the price in South Australia and Victoria, with real examples and the extras to watch for.
How much does a solar battery cost in 2026?
There’s no single price, because a battery quote bundles several things: the battery modules, often a hybrid inverter or gateway, installation labour, switchboard work, and sometimes backup wiring. As a rule of thumb, typical 2026 market prices are about $700–$1,300 per usable kWh before the discount. Smaller batteries sit at the top of that range because the fixed costs (inverter, labour, compliance paperwork) are spread over fewer kWh.
This price guide is part of our complete guide to home solar batteries in SA and Victoria, which also covers sizing, backup, brands and lifespan.
What does the federal discount take off a battery?
The Cheaper Home Batteries Program gives your battery small-scale technology certificates (STCs) based on its usable capacity. Your installer sells them and takes their value off your invoice. For installs from 1 May to 31 December 2026 the rate is 6.8 STCs per kWh, tapering for larger batteries: 100% for the first 14 kWh, 60% from 14–28 kWh and 15% from 28–50 kWh.
| Usable capacity | Approx. STCs (2026) | Approx. discount at $37–$40 per STC |
|---|---|---|
| 10 kWh | 68 | $2,500–$2,700 |
| 13.5 kWh | 91 | $3,400–$3,600 |
| 16 kWh | 103 | $3,800–$4,100 |
| 20 kWh | 119 | $4,400–$4,750 |
| 25.6 kWh | 142 | $5,250–$5,700 |
| 30 kWh | 154 | $5,700–$6,150 |
STC prices move with the market, and some installers deduct fees, so the figure on your quote may be a little lower. For the full eligibility rules, see our guides to the Cheaper Home Batteries Program in SA and battery rebates in Victoria.
Real 2026 battery price examples
SolarQuotes publishes indicative installed prices. These figures, updated 12 May 2026 after the program changes, include the federal discount, GST and an assumed $3,000 for a straightforward installation:
| Battery (example) | Usable size | Approx. installed price after discount | Per usable kWh |
|---|---|---|---|
| SigenStor (single-phase) | 15.6 kWh | ~$9,800 | ~$630 |
| Sungrow SBR | 16 kWh | ~$10,000 | ~$625 |
| iStore | 10 kWh | ~$10,800 | ~$1,080 |
| Sungrow SBR | 25.6 kWh | ~$14,000 | ~$550 |
SolarQuotes lists a Tesla Powerwall 3 (13.5 kWh, with its Backup Gateway) at about $10,000 after the discount but before installation. Treat all of these as a guide. Your price depends on the installer, the site and what’s included.
What adds to the cost of a battery installation?
Two quotes for the “same” battery can differ by several thousand dollars. The most common reasons:
- Your existing inverter. If you have an older string inverter, you either add a battery with its own inverter (AC coupling) or replace your inverter with a hybrid, which SolarQuotes puts at about $3,000 or more.
- Three-phase power. A three-phase hybrid inverter costs more (SolarQuotes compares $4,500 with $3,600 for a 10 kW Sungrow), plus at least $500 more to install.
- Inverter size. A 10 kW hybrid inverter can cost around $1,300 more than a 5 kW model, but lets you run bigger loads and charge faster.
- Distance and location. Long cable runs from the switchboard can add $1,000 or more. AS/NZS 5139 location rules may require bollards, weather protection or fire-rated backing.
- Backup. A simple override switch adds about $200. Wiring more circuits to backup, or whole-home backup with a gateway, costs more.
- Switchboard upgrades. Older boards with ceramic fuses or no space often need upgrading. Ask for this to be priced separately.
Tip: Buying solar and a battery together usually saves money because one hybrid inverter does both jobs. SolarQuotes estimates the saving at around $1,000 compared with retrofitting later.
Why bigger batteries are cheaper per kWh, but get less discount
Battery modules are only part of the cost, so adding capacity is relatively cheap once the inverter and labour are paid for. The examples above show this: about $1,080 per kWh for a 10 kWh battery versus about $550 per kWh for 25.6 kWh.
The discount works the other way. At 2026 rates, each kWh in the first 14 kWh earns about $250–$270 off. Each kWh from 14 to 28 kWh earns about $150–$165, and each kWh from 28 to 50 kWh only about $40. So the “sweet spot” for value is often somewhere in the mid-teens to mid-20s of kWh, provided you can actually use that much storage. Our guide to what size solar battery you need shows how to work that out from your bills.
Is the solar battery cost different in SA and Victoria?
Hardware and labour prices are broadly similar in Adelaide and Melbourne, and the federal discount is the same nationally. The differences are in the extras:
- South Australia: no state battery rebate. Priority households (for example concession card holders) may still get the REPS VPP incentive in 2026 if they join an approved virtual power plant. SA Power Networks must assess the connection before installation.
- Victoria: no state battery rebate for owner-occupiers. If you add new solar at the same time, the Solar Homes panel rebate (up to $1,400, income cap $150,000) can reduce the overall package price. Your electrician must also issue a Certificate of Electrical Safety under Energy Safe Victoria rules.
Will battery prices fall if I wait?
Hardware prices have trended down, and Energy Matters reported in August 2026 that several manufacturers cut list prices after the May discount reduction. But the discount itself is scheduled to fall every six months. On 1 January 2027 the rate drops from 6.8 to 5.7 STCs per kWh. That’s about 11 fewer certificates (roughly $400) on a 10 kWh battery and about 15 fewer (roughly $550) on 13.5 kWh, and it keeps falling to 2.1 by the second half of 2030.
Waiting also has a running cost: every month without a battery is a month of buying evening power at peak rates. Whether that adds up depends on your usage, which we cover in is a solar battery worth it in 2026.
How to compare battery quotes fairly
- Convert each quote to price per usable kWh after the discount. Check the usable, not nominal, capacity.
- Check the quote shows the number of STCs and the dollar value deducted.
- Confirm what’s included: inverter or gateway, backup circuits, switchboard work, monitoring and network application.
- Compare warranties: battery years and retained capacity, inverter, and the installer’s workmanship warranty.
- Check the battery is on the approved list and VPP-capable, or you won’t get the discount.
Our checklist for comparing solar quotes applies to batteries too. If upfront cost is the barrier, see our guide to solar and battery finance options.
Frequently asked questions
How much is a 10 kWh solar battery in 2026?
Before the federal discount, a 10 kWh battery typically costs somewhere between $7,000 and $13,000 installed, depending on brand and site. The discount takes off about $2,500 to $2,700 until 31 December 2026. SolarQuotes’ May 2026 example for a 10 kWh battery was about $10,800 installed after the discount, but cheaper options exist.
Does the battery price include a new inverter?
Not always. Some batteries, such as the Tesla Powerwall 3 and SigenStor, include their own inverter. Others need a separate hybrid inverter, which may already be on your roof-solar system or may need to be added. Ask every installer to list the inverter, any gateway and the backup equipment separately on the quote.
Is the federal battery discount taken off my quote?
Yes. Your installer creates the STCs and deducts their value from the price, so you pay the lower amount upfront rather than claiming a refund. The quote should show how many certificates your battery earns. The number depends on usable capacity and installation date, so make sure the install happens before the rate changes if you’re counting on it.
Why are some battery quotes so much cheaper than others?
Differences usually come from the brand, the size of the inverter, whether backup and switchboard work are included, and the installer’s overheads and warranty. Very cheap quotes can also mean shortcuts. Regulator inspections in 2026 found many battery installs had compliance issues, so check accreditation and what’s included before choosing on price.
Want a clear, itemised price for your home? Our Adelaide and Melbourne team can quote a solar battery system with the discount, inverter and backup options spelled out. Get a free quote.
Sources: SolarQuotes – How much do solar batteries cost? (updated 12 May 2026); Clean Energy Regulator – Solar batteries (updated 31 Jul 2026); DCCEEW – Cheaper Home Batteries Program (updated 9 Jun 2026); Energy Matters – Why your battery quote changed after the rebate cut (19 Aug 2026). Prices are indicative market figures, not Solar Beat prices, and STC values change with the market. Featured image: Yan lance / Wikimedia Commons, CC0.
