Solar battery prices in Australia can vary significantly. A battery advertised at one price may exclude the inverter, installation, backup hardware, switchboard work or the federal battery discount.
As a broad 2026 market guide, the most common 10 kWh home batteries generally cost around $10,000 to $14,000 fully installed before the federal discount. After an indicative discount, many eligible systems may fall closer to $7,000 to $11,000.
The final price depends on usable capacity, brand, system design, inverter compatibility and the work required at your property.
These are planning ranges, not a quote. Battery pricing, STC values and installation requirements change over time.
What do solar batteries cost in Australia in 2026?
Indicative fully installed price ranges are:
- 5 to 6 kWh: approximately $6,000 to $9,000 before the federal discount, or around $4,500 to $7,000 after an indicative discount
- 10 kWh: approximately $10,000 to $14,000 before the federal discount, or around $7,000 to $11,000 after an indicative discount
- 13 to 15 kWh: approximately $12,000 to $17,000 before the federal discount, or around $9,000 to $13,000 after an indicative discount
- Around 20 kWh: approximately $15,000 to $23,000 before the federal discount, or around $12,000 to $19,000 after an indicative discount
Prices vary by brand, usable capacity, inverter compatibility, installation complexity, regional travel, current stock and the market value of small-scale technology certificates.
When comparing solar battery prices, make sure every quote includes the same scope. A hardware-only price is not comparable with a fully installed and commissioned system.
What should a fully installed battery quote include?
A complete solar battery installation may include:
- Battery modules
- A compatible battery or hybrid inverter
- Backup gateway or changeover equipment, where selected
- Mounting equipment
- Cabling and protection devices
- Electrical labour
- Switchboard work, where required
- System commissioning and monitoring setup
- Network or compliance documentation
- Product and workmanship warranties
- The federal battery discount shown as a separate line item
Ask whether backup power is included. Some batteries can store energy but will not automatically power the home during a blackout unless the right backup hardware and circuits are included.
How does the federal battery discount affect the cost?
The Australian Government’s Cheaper Home Batteries Program supports eligible batteries connected to new or existing rooftop solar.
The program aims to provide a discount of around 30% on the upfront cost of a range of eligible small-scale battery systems. The final value is delivered through small-scale technology certificates and depends on usable battery capacity, the applicable STC factor and the certificate value.
For batteries installed from 1 May to 31 December 2026, the STC factor is 6.8 per eligible kWh. Support is tiered by usable capacity:
- The first 14 kWh receives 100% of the applicable STC factor
- Capacity above 14 kWh and up to 28 kWh receives 60% of the factor
- Capacity above 28 kWh and up to 50 kWh receives 15% of the factor
Eligible systems can have a nominal capacity of 5 kWh to 100 kWh, but STCs apply only to the first 50 kWh of usable capacity. The discount is not a fixed dollar amount. The value shown on a quote depends on the installation date, usable capacity, product eligibility and certificate value.
Nothing above 50 kWh of usable capacity earns anything, even though systems up to 100 kWh can still be installed.
Using the current certificate rate and the Clean Energy Regulator’s fixed clearing house price, that works out to roughly:
| Usable capacity | Federal rebate |
|---|---|
| 10kWh | ~$2,720 |
| 14kWh | ~$3,800 |
| 20kWh | ~$4,760 |
| 28kWh | ~$6,080 |
| 40kWh | ~$6,560 |
Figures are approximate and based on the current certificate rate. Your quote will vary.
For a fuller explanation of the current settings, see our Cheaper Home Batteries Program update.
What changes the price of a solar battery?
Battery size and usable capacity affect the total equipment cost. The largest system is not automatically the best-value choice, particularly because federal support tapers above 14 kWh.
Battery brand and warranty also matter. Premium systems may cost more because of their warranty terms, software, support network, power output, build quality or integration options.
Your existing inverter can change the design. Some batteries can connect to an existing solar system using an AC-coupled setup, while others require a compatible hybrid inverter.
Backup requirements add equipment and installation work. Whole-home backup usually costs more than selected-circuit backup.
Switchboard, cabling and location can also change the installed price. Older switchboards, long cable runs, difficult access, protection barriers, regional travel and local network requirements may increase the total.
What size solar battery do you need?
The right battery size depends on how much solar you export during the day and how much electricity you use after the sun goes down.
Start with:
- Average daily electricity use
- Evening and overnight consumption
- Excess solar exported to the grid
- Seasonal changes in usage and solar generation
- Your electricity tariff
- Whether you want blackout backup
- Planned additions such as an electric vehicle, induction cooking or electric hot water
A battery that is too small may not cover evening use. A battery that is too large may regularly sit partly empty or require more solar and inverter capacity to charge effectively.
Bigger is not always better. A well-sized battery should match the way your household actually uses energy.
Is a solar battery worth the cost?
A battery may be worthwhile when you export a meaningful amount of solar during the day and buy electricity back from the grid at a much higher rate in the evening.
The financial result depends on:
- Your current feed-in tariff
- The price you pay to import electricity
- How much stored energy you can use each day
- Battery efficiency and degradation
- The installed cost after incentives
- Whether you value backup power
- How long you expect to remain in the property
A battery can also provide benefits that are not fully captured in a simple payback calculation, including greater energy independence, protection from peak tariffs and backup capability where the system is designed for it.
Be cautious of any quote that guarantees a particular bill or payback period without using your actual interval data and tariff.
How can you compare solar battery quotes properly?
Ask each installer to show:
- Usable battery capacity in kWh
- Continuous and peak power output in kW
- Battery and inverter models
- Whether the system is AC-coupled or DC-coupled
- Whether backup is included
- Which circuits will operate during an outage
- Battery, inverter and workmanship warranties
- All switchboard and site work
- The federal discount as a visible line item
- Estimated annual savings and the assumptions used
Comparing the installed price per usable kWh can help, but it should not replace a review of quality, power output, warranty and installation scope.
Get a solar battery price for your home
Online solar battery prices are useful for early planning, but your home’s usage, solar system and switchboard determine the real installed cost.
Future NRG can review your current solar setup, assess your energy use and recommend battery storage systems suited to your household rather than simply selling the largest available system.
Request a tailored battery quote or book a call.
Frequently asked questions
How much does a 10 kWh solar battery cost in Australia?
As a broad 2026 guide, a fully installed 10 kWh battery may cost approximately $10,000 to $14,000 before the federal discount and around $7,000 to $11,000 after an indicative discount. Your quote may vary.
Does the advertised battery price include installation?
Not always. Check whether the price includes an inverter, labour, switchboard work, backup equipment, commissioning, GST and the federal discount.
Can I add a battery to my existing solar system?
Often, yes. The design depends on the current inverter, solar capacity, switchboard, available space and battery model.
How much is the Australian solar battery discount?
It is not a fixed cash amount. The Cheaper Home Batteries Program aims to provide around 30% off eligible systems, calculated through STCs according to usable capacity and the applicable factor.
Does a battery work during a blackout?
Only when the system includes compatible backup capability and has been configured to supply selected circuits or the whole home. A standard battery installation does not automatically guarantee backup power.
Is a larger battery better value?
Larger batteries may cost less per kWh of storage, but they are not always the best fit. Federal support also tapers above 14 kWh of usable capacity, so sizing should be based on actual solar generation and energy use.
How long do solar batteries last?
Many home batteries carry a warranty of around 10 years, although warranty terms vary by brand and may include limits based on energy throughput, retained capacity or operating conditions.
