Solar Battery Price in Australia: Costs, ROI & Rebates 2025
Over the years, solar PV systems have become a mainstream solution for reducing electricity bills and embracing sustainable living. In 2025, more households than ever are installing solar panels. However, as energy independence becomes a stronger goal, attention has shifted toward solar batteries—and more specifically, their cost.
So, what exactly is the solar battery price in 2025? Are they worth the investment? In this guide, we dive deep into the current solar battery price landscape in Australia, covering average costs, pricing factors, government incentives, and real-world ROI calculations. Finally, we’ll offer practical tips on how to reduce the total cost of your solar battery system.
Average Solar Battery System Costs in 2025
As of May 2025, the average price of solar batteries in Australia ranges from $900 to $2,000 per kilowatt-hour (kWh) of storage. A 10kWh system typically costs a little over $10,000, while a larger 16kWh system may approach $16,000, depending on the brand, performance, and installation factors.
Here’s a breakdown of average prices.
Battery Size | Battery Only Price | Battery + Inverter/Charger |
3kWh | $4,140 | $4,950 |
8kWh | $9,040 | $10,240 |
13kWh | $13,650 | $15,080 |
18kWh | $17,820 | $19,260 |
These costs reflect reputable brands available in Australia and exclude additional solar PV system components.
Note: A complete solar generator system includes more than just the battery. Solar panels, inverters, installation, and wiring all contribute to the final cost.
Factors Influencing Solar Battery Prices
The cost of solar batteries can vary significantly. Several key factors influence pricing:
Battery Capacity (kWh)
The more storage you need, the higher the cost. Larger batteries provide more energy independence but require a bigger upfront investment. For example, doubling from 6 kWh to 12 kWh doesn't just double the cost—it can also increase installation complexity.
Battery Chemistry
Most batteries today are lithium-ion, but within that category, LFP (lithium iron phosphate) batteries offer longer life and higher safety, often at a premium. Older lead-acid batteries are cheaper but less efficient and durable. EcoFlow portable power stations and home backup generators use automotive-grade LFP cells, providing thousands of stable charge cycles and dependable performance.
Brand and Warranty
Premium brands like EcoFlow come with advanced features and longer warranties, which increase the cost but may enhance long-term value.
Installation and Integration
Installing a battery with an existing system is generally more complex than integrating it from the start. Additional costs may include compatible inverters, electrical upgrades, or system redesigns.
State Rebates for Solar Batteries
In early 2025, the federal government of Australia announced a $2.3 billion battery rebate scheme, launching on 1st July 2025. This program will deliver rebates of approximately $370 per kWh, or around 30% off the battery installation cost.
While the national battery rebate is coming soon, several state governments already offer (or are about to offer) attractive programs that help reduce the upfront cost of battery installations. Here's a look at what's available:
New South Wales (NSW)
The NSW Government Solar Battery Rebate launched on 1st November 2024. It offers between $1,600 and $2,800, depending on your battery size and eligibility. This makes NSW one of the most supportive states for homeowners adopting battery storage.
Victoria
Solar Victoria provides interest-free battery loans of up to $8,800. To qualify, homes must already have at least 5 kW of solar generator installed, be owner-occupied, and meet income eligibility thresholds.
ACT
In the ACT, you can get an interest-free loan of up to $15,000 to cover the cost of solar and battery systems. The eligibility criteria are quite broad and support the uptake of a range of climate-friendly products.
WA
WA has announced the Residential Battery Rebate Scheme, set to launch by 1st July 2025. This includes rebates up to $7,500 and interest-free loans up to $10,000. Systems must be 5 kWh or larger and VPP-ready (Virtual Power Plant).
Is a Solar Battery Worth the Investment?
One of the biggest questions homeowners ask is: "Is a solar battery worth the money?" Let’s settle that with a real-world ROI calculation based on typical Australian conditions.
System Overview & Assumptions
These are the core parameters used in our financial model. The figures reflect average usage and pricing in Australia as of 2025. In this model, we use a 6kW solar system with a 10kWh solar battery.
Metric | Value |
Daily electricity usage | 20 kWh |
Solar system size | 6 kW |
Battery capacity | 10 kWh |
Solar system cost | $8,000 |
Battery cost | $12,000 |
Total cost | $20,000 |
Feed-in tariff | $0.08/kWh |
Grid electricity rate | $0.30/kWh |
Solar output (avg daily) | 24 kWh/day (Australian average) |
Analysis period | 20 years |
Energy Usage Breakdown (Daily)
This breakdown shows how solar energy is used in a typical day: how much goes directly to your home, how much charges the battery, and what’s left to export to the grid.
Flow Type | Value | Explanation |
Solar generated | 24 kWh/day | Based on 6 kW array × 4 hours avg sunlight |
Household consumption | 20 kWh/day | Your fixed usage |
Daytime solar usage | 10 kWh/day | Used directly when the sun is shining |
Battery charge usage | 10 kWh/day | Charged during the day, used at night |
Grid usage | 0 kWh/day | Fully self-sufficient on typical days |
Solar export | 4 kWh/day | Excess sent to grid |
Annual Financial Savings
Now let’s quantify the savings. These figures combine the money you save by not buying electricity from the grid, plus small earnings from exporting excess solar energy.
1. Avoided Grid Electricity Cost
20 kWh/day × $0.30 = $6.00/day.
Annual savings: $6.00 × 365 = $2,190.
2. Feed-In Tariff (Export Income)
4 kWh/day × $0.08 = $0.32/day.
Annual income: $0.32 × 365 ≈ $117.
From here we get
Total Annual Benefit = $2,190 + $117 = $2,307.
Payback Period = $20,000 ÷ $2,307 ≈ 8.7 years.
Total 20-Year Savings = $2,307 × 20 = $46,140.
Net Gain Over 20 Years = $46,140 – $20,000 = $26,140.
Return on Investment (ROI) = $26,140/$20,000 = 130.7%.
As shown, over 20 years, a solar battery system delivers $46,140 in savings, recovers its cost in 8.7 years, and provides a strong 130.7% return on your original $20,000 investment, making it a worthwhile investment for most households.
How to Reduce the Cost of a Solar Battery System
While solar batteries are becoming more affordable, there are smart ways to reduce your upfront costs further:
Time Your Purchase with Rebates
Take advantage of federal and state-based rebate programs as soon as they launch. These incentives can reduce your costs by 20–40%, making a massive difference in your payback period.
Choose the Right Battery Size
Avoid over-investing in excessive storage. Analyze your consumption patterns and match battery size to your needs. A 10kWh capacity home backup generator might suit most families, but smaller homes could save thousands with a 6–8 kWh unit.
Many modern battery systems offer modular expandability to adapt to your changing needs. For example, the EcoFlow DELTA Pro 3 Portable Power Station comes with 4–12kWh capacity, LFP battery, and multiple fast charging methods to power almost all of your home appliances, while offering exceptional flexibility whether you're just starting out or planning to scale over time.
EcoFlow DELTA Pro 3 Portable Power Station
Bundle with a New Solar System
If you’re installing both a new solar PV system and battery together, you may qualify for installation discounts or package deals. Integrated systems are often cheaper and more efficient than retrofitting batteries later.
Conclusion
Overall, solar battery prices in 2025 are more affordable and more supported than ever before, especially in Australia, where both national and state-level programs are pushing the transition to clean energy storage. While the upfront cost of a solar battery system can be significant, the financial returns, energy independence, and environmental benefits make it a compelling investment.
With the right system size, smart planning, and the help of available rebates, you can unlock a future of low energy bills and clean, reliable power. Now is the time to take the next step—compare battery options, check rebate eligibility, and make the switch to smarter solar.
FAQs
How much does a solar battery cost?
As of 2025, the installed price of a solar battery in Australia generally ranges from $900 to $2,000 per kilowatt-hour (kWh), depending on the brand, battery chemistry, and installation complexity. Most home batteries fall between $8,000 and $15,000 installed.
How much is a 10kW solar battery in Australia?
A 10kWh solar battery system in Australia typically costs between $10,000 and $12,000 for standard installations, with premium brands reaching up to $15,000 or more. Prices vary with brand, installation requirements, and available rebates.
What is the average cost of a solar panel battery?
The average cost for a solar panel battery in Australia is about $900 to $2,000 per kWh installed. For example, an 8kWh battery system will usually cost around $9,000 to $10,000, depending on the brand and installation specifics.