How Much Does a Solar Battery Cost in Australia?

Last updated on February 13, 2026

Quick Answer: In Australia, the typical cost of a fully installed solar battery system is between A$6,500 and A$16,000+ in 2026. A standard 10kWh system generally ranges from A$8,000 to A$12,000. Meanwhile, smaller 5kWh systems start around A$4,000-A$6,000 after federal rebates. Larger systems for high-usage homes or businesses can cost over A$15,000.

The final cost of a solar battery in Australia basically depends on the capacity, brand and installation complexity. But there’s more to the story.

Electricity prices are expected to rise by up to 9.7% in some states, which is why many homeowners are looking for ways to take control of their energy bills.

With solar batteries, you store excess solar energy generated during the day and use it at night or during peak pricing hours. This potentially helps you save hundreds or even thousands of dollars each year.

Why install a solar battery?

Aussies install solar batteries for many good reasons, which include:

🟩 Backup power: The average household in Australia basically experiences at least one unexpected blackout every year. Some areas like NSW, VIC and QLD can see outages that can last 6–12 hours during storms or heatwaves.

A solar battery can keep essential appliances running, such as the fridge, lights, Wi-Fi and even air-conditioning. For small businesses like cafés or offices, losing power for just 4–6 hours can cost A$500–A$1,000 in lost revenue, and this means batteries are a great investment.

🟩 Lower electricity bills: The average residential electricity price in 2026 is about 34 cents per kWh. Households typically earn 8–10 cents per kWh for exporting excess solar.

That’s a difference of roughly 24–26 cents per kWh. A household using a 10 kWh battery to store daytime solar energy for night-time use can save A$1,200–A$1,500 every year.

On the other hand, small businesses using a 20 kWh battery may see savings of A$2,500–A$3,500 annually.

🟩 Energy independence: Around 60% of Australian households say they want to rely less on the grid because electricity prices keep rising. A solar battery allows you to use your own energy when you want it.

Homes with batteries can cover 50–70% of their night-time energy use from stored solar, and this will depend on battery size and household consumption.

For small businesses, this can cover up to 80% of after-hours electricity use. This reduces reliance on expensive grid power and provides a safety net during price spikes.

Average Solar Battery Cost in 2026

Solar batteries are a big investment in 2026. It has become more common than in recent years and a little less expensive.

Here’s what typical installed pricing looks like right now:

Battery size	Typical installed cost (Australia 2026)
5-6 kWh	A$6,000-A$9,000
9-11 kWh	A$9,000-A$13,500
13-15 kWh	A$12,000-A$17,000
20-30 kWh (small commercial)	A$18,000-A$30,000+
40-50 kWh	A$35,000-A$45,000+

Cost per usable kWh typically ranges from A$800 to A$1,200, including installation. The cost for residential systems tends to be higher per kilowatt-hour compared to commercial ones, since the labour and compliance costs do not scale well.

Solar Battery Cost Breakdown

Many people mistakenly believe that when they find a solar battery for sale at a particular price on the internet, this is the price they will ultimately pay. It never is. There are more costs involved. Here is what really adds up:

🟩 Battery Unit Cost

This accounts for around 60-70% of the total cost. For example, a 10kWh battery for households will cost between A$6,000 and A$7,500. Larger commercial-scale batteries like a 25kWh model can cost between A$18,000 and A$22,000.

🟩 Installation & Labour

You’ll have to pay A$1,500–A$3,000 just to connect your battery to your domestic electrical system. Commercial sites can cost A$3,000–A$7,000 depending on complexity.

🟩 Inverter / hybrid inverter (if required)

If the current inverter does not match well with batteries, you will need a hybrid inverter, which costs around A$2,000—A$4,000.

🟩 Electrical Upgrades & Accessories

Some homes also require switchboard upgrades, safety isolators or additional wiring. This can involve an additional A$500–A$2,000.

🟩 Monitoring system

Some smart apps and web-based monitoring may incur an extra cost of a few hundred dollars.

2026 Australia Solar Battery Price & Brand Comparison

Estimated total installed costs in AUD, including GST, before state-specific rebates.

Brand & Model	Max Capacity (kWh)	Typical Installed Price (AUD)	Approx. Cost per kWh (AUD)	Warranty
Sigenergy (SigenStor)	54 kWh	$11,500 – $14,500	$850 – $1,150	10 Years
Alpha-ESS	34.2 kWh	$8,200 – $13,500	$800 – $1,000	5 Years
Sungrow SBR/SH	25.6 kWh	$8,800 – $13,500	$850 – $1,000	10 Years
Tesla Powerwall 3	13.5 kWh	$14,500 – $17,500	$1,050 – $1,200	10 Years
BYD Battery-Box	13.8 kWh	$9,000 – $12,000	$800 – $1,000	10 Years
Anker SOLIX X1	10.1 kWh	$11,000 – $14,000	$900 – $1,100	10 Years
Enphase IQ Battery	10 kWh (stack)	$12,500 – $15,000	$1,250 – $1,500	10 Years
Fox-ESS	10.2 kWh	$7,500 – $12,000	$800 – $900	10 Years
GoodWe Lynx	9.6 kWh	$8,500 – $11,000	$850 – $1,000	10 Years

Key Insights on Cost per kWh

Capacity Savings: Larger solar power storage systems (like Sigenergy or Alpha-ESS) offer a lower cost per kWh because fixed costs are spread across more storage.
Premium Pricing: Tesla and Enphase maintain higher costs (over $1,050) due to integrated features and software ecosystems.
Value Tier: Sungrow and Alpha-ESS are current value leaders, often sitting below the $1,000 per kWh mark.

Government Rebate Impact

The figures above are “sticker prices.” Through providers like E-Green Electrical, you can often reduce these totals by $3,000 to $5,000, depending on state-specific programs like QLD’s Battery Booster or VIC’s interest-free loans.

Factors That Affect Solar Battery Cost

There are a few key aspects that can make a solar battery much more costly compared to another. The following are the most important:

Battery Size (kWh): The larger the battery’s capacity, the greater its cost will be. The 5 kWh capacity battery will cost less than the 15 kWh capacity battery.

Battery Type: The main difference between the two batteries, i.e., Lithium-ion or LFP batteries, is the cost of replacement. LFP batteries may last longer compared to Lithium-ion batteries, but cost more upfront.

Brand & warranty: Higher-quality brands with longer warranties can add A$1,000 to A$2,000 to the cost.

System Compatibility: Old solar panels or inverters may require an upgrade, which also attracts additional costs.

Phase type: Three-phase homes or businesses cost more to connect compared to single-phase ones.

Complexity of installation: Difficult installation areas or wiring may add labour costs.

Solar Battery Cost by Popular Sizes

Different homes and businesses require different types of solar batteries. In fact, selecting the right size will help save money and ensure you have adequate power when you really need it. Here’s a quick guide:

5–6 kWh Battery (A$6,000–A$9,000 installed): Great for small homes or apartments needing basic overnight backup and essential power.
9–11 kWh Battery (A$9,000–A$13,500 installed): The most popular size for average households, covering evening and some morning use, reducing peak grid reliance.
13–15 kWh Battery (A$12,000–A$17,000 installed): Ideal for larger homes or households with high energy needs like air conditioning or EV charging.
20–30 kWh Battery (A$18,000–A$30,000+ installed): Suitable for small businesses or large households seeking significant energy independence and backup during outages.
40–50 kWh Battery (A$35,000–A$45,000+ installed): Designed for commercial use or very high-consumption properties requiring extensive backup and cost savings on large-scale energy use.

Solar Battery Rebates, Incentives & Tax Benefits

Solar battery rebates in Australia have undergone significant structural changes. The Federal Cheaper Home Batteries Program, launched in July 2025, remains the primary incentive, providing an upfront discount of approximately 30%.

Rebates act as a direct point-of-sale discount applied by your installer, meaning you only pay the net price.

Solar batteries currently receive approximately $311 per usable kWh. A standard 10 kWh battery attracts a federal rebate of roughly $3,110.

The major change is that as of 1 May 2026, the rebate will transition to a tiered system to discourage “oversizing.” Support will be strongest for standard household sizes and drop significantly for larger capacities.

Common mistakes:

Waiting past the May 1st Deadline
Assuming that all batteries qualify
Overlooking VPP requirements
Inverter Incompatibility
Using non-approved installers
Missing funding caps

Hidden Costs to Watch Out For

Buying a solar battery isn’t just about the price tag. There are a few more costs you need to know:

Upgrade of switchboard

Old homes may require a new switchboard to support the battery voltage. This can cost between A$500 and A$2,000.

Inverter replacement

If your existing inverter is not compatible, you would need to replace it, which can cost A$2,000 to A$4,000.

Ongoing monitoring fees

Some batteries may have associated apps or monitoring systems. Advanced features may cost A$10-A$50 per month.

Battery replacement

The batteries have a lifespan of about 10-15 years. Replacing them later in life means extra expense.

FAQs About Solar Battery Costs

Why are solar batteries so expensive?

The major reasons for the high cost of solar batteries are related to the high cost of manufacturing the advanced lithium-ion technology and installation with appropriate complex and special hardware, such as inverters.

How long does a solar battery last?

Most solar batteries last 10–15 years. This depends on how much energy you use every day. Lithium iron phosphate (LFP) batteries can last longer, sometimes up to 15 years or 10,000 cycles.

Can I install a solar battery without solar panels?

Yes. The battery charges from the electrical grid and offers benefits such as providing backup power during outages and saving money on electricity bills by using time-of-use tariffs.

Does a bigger battery save more money?

A bigger solar battery can save more money by storing more excess solar energy for use during high-rate and off-peak times. However, it does not always provide a better financial return. Larger batteries are ideal for high-consumption households. They offer lower installation costs per kWh but a properly sized system for your specific energy usage usually provides the fastest payback period.

What’s the cheapest solar battery option?

The Alpha ESS Smile Series and Sungrow SBR are consistently rated as the most affordable and best budget-friendly solar battery options in Australia. This is especially true when considering the available federal and state government rebates.

Do solar rebates or incentives reduce the cost of a battery?

Yes! Federal and state programs can cut $3,000–$5,000 or more off the upfront cost, depending on your battery size and eligibility.

Is it cheaper to install a battery with a new solar system or add one later?

Installing at the same time as your solar system is often cheaper. Doing it later can require extra wiring, inverter upgrades, and additional labour.

How do brand and capacity impact solar battery pricing?

Larger batteries cost more upfront, but usually reduce the cost per kWh. Premium brands like Tesla or Enphase also add extra for advanced features, software, and longer warranties.

What is the typical payback period for a solar battery investment?

Most systems pay for themselves in about 8–12 years, depending on your energy use, tariffs, and battery size.

Are solar batteries worth the cost for Australian households?

They can be. If you want backup power, lower electricity bills, or more control over your energy, a battery can make a real difference, especially for homes using a lot of electricity in the evenings.

What are typical solar battery prices in Sydney?

Similar to NSW overall: A$6,000–A$17,000 installed. Smaller residential batteries are at the lower end, and larger or premium systems are at the higher end.

How much is a 10 kWh solar battery?

A 10 kWh system generally costs A$8,000–A$12,000 installed, depending on the brand and your installation setup.

What is the average battery cost per kWh?

Installed systems usually cost between A$800–A$1,200 per usable kWh, with larger systems offering better value per kWh.

What is the cost of a solar battery in NSW?

In NSW, prices generally range from A$6,000 to A$17,000, depending on size, brand, and any rebates available.

How much does a Tesla solar battery cost?

A Tesla Powerwall 3 usually costs around A$14,500–A$17,500 installed.

What does a 6 kWh solar battery cost in Australia?

Typically, A$6,000–A$9,000 installed, depending on brand and installation complexity.