As energy prices in Australia continue to rise and environmental concerns become increasingly urgent, more homeowners and businesses are turning to solar energy to reduce electricity costs and carbon emissions. A popular choice among Australian households with higher energy demands is the 10kW solar system — especially when combined with solar battery storage for enhanced energy independence.

But how much does a 10kW solar system with a battery cost in Australia? In this comprehensive guide, we’ll break down the pricing, components, rebates, and long-term benefits to help you make an informed decision.

What Is a 10kW Solar System?

A 10kW solar system (or 10 kilowatt system) typically includes around 24 to 28 solar panels and is suitable for:

Larger homes with high energy consumption (air conditioning, pool pumps, EV charging, etc.)
Small businesses or home offices
Households looking to future-proof their energy needs

It can produce an average of 35 to 44 kWh of electricity per day, depending on your location and roof orientation.

Why Add a Battery to Your 10kW Solar System?

Adding a battery storage system to your 10kW solar setup allows you to:

Store excess energy generated during the day
Use stored power at night or during power outages
Reduce reliance on the grid
Maximise your solar investment by increasing self-consumption

One of the most common battery sizes paired with a 10kW solar system is the 13.5kWh Tesla Powerwall or similar lithium-ion batteries from brands like Sungrow, LG Chem, or BYD.

Average Cost of a 10kW Solar System Without Battery (2024)

Before we dive into battery pricing, it’s important to know what a standalone 10kW system costs in Australia.

StateAverage Cost (No Battery)

New South Wales: $9,000 — $11,000

Victoria: $9,500 — $11,500

Queensland: $8,800 — $10,800

South Australia: $9,200 — $11,200

Western Australia: $9,000 — $11,000

These prices usually include STC rebates, which reduce upfront costs under the federal government’s solar incentive scheme.

How Much Does a 10kW Solar System with Battery Cost in Australia?

Adding a battery to your 10kW system significantly increases the upfront investment. Below is a general breakdown:

Component: Estimated Cost (AUD)

10kW Solar Panels: $9,000 — $11,000

Hybrid Inverter: $2,000 — $3,500

Battery (10–15kWh): $9,000 — $16,000

Installation & Labour: $2,000 — $4,000

Total (with Battery): $20,000 — $32,000

The final price depends on:

Battery brand and capacity
Type of inverter (hybrid or separate)
Installation complexity
Location and available rebates

Factors Affecting the Cost of a 10kW Solar + Battery System

1. Battery Size and Brand

A 10kW solar system can charge a battery of 10–15kWh capacity efficiently. Prices vary based on battery performance, warranty, and brand:

Tesla Powerwall 2 (13.5kWh) — ~$13,500–$15,000
Sungrow Battery (9.6kWh) — ~$9,500–$11,000
BYD or LG Chem (10kWh) — ~$10,000–$13,000

2. Inverter Compatibility

To integrate a battery, you’ll need a hybrid inverter or a separate battery inverter. A hybrid inverter is more efficient and cost-effective but may cost more upfront.

3. Installation Complexity

Roof access, tilt angle, panel layout, and switchboard upgrades can affect installation cost.

4. Location-Based Pricing

Installers in metro areas may offer lower prices due to competition, while rural installations can be more expensive due to travel and logistics.

Available Rebates and Incentives (2024)

Australia offers several government rebates and incentives that can reduce your solar and battery system costs:

1. STC (Small-scale Technology Certificates)

These are federal incentives that reduce the cost of solar panels. A 10kW system typically qualifies for around $3,000–$4,000 in STCs, depending on your location.

2. State Battery Rebates

Victoria: Up to $2,950 battery rebate through Solar Victoria.
South Australia: Home Battery Scheme (now closed but may return).
New South Wales: Empowering Homes pilot (limited areas).

Always check your state government website or talk to your installer about active offers.

How Much Can You Save with a 10kW Solar and Battery System?

Without a Battery:

Annual electricity production: ~14,000–16,000 kWh
Estimated annual savings: $2,500 — $3,000

With a Battery:

Use more of your solar energy (up to 80–90%)
Save on both daytime and nighttime usage
Potentially add another $600 — $1,000 in annual savings
Greater protection from blackouts and peak pricing

Payback Period for a 10kW Solar System with Battery

The payback period is the time it takes for your energy savings to equal your initial investment.

System TypePayback Period (Est.)10kW Solar (No Battery)4–6 years10kW Solar with Battery8–12 years

Batteries extend the payback time, but offer added benefits like energy security, grid independence, and increased self-consumption.

Is a 10kW Solar System with Battery Worth It?

It depends on your goals and energy usage. You might benefit the most if you:

Have a high electricity bill (>$500/month)
Use power in the evening when solar panels aren’t generating
Want to reduce your carbon footprint
Experience frequent blackouts or grid instability
Plan to stay in your property long-term

Tips for Buying a 10kW Solar System with Battery in Australia

Choose a CEC-accredited installer — Ensure compliance and eligibility for rebates.
Compare quotes — Don’t just go with the cheapest; look for value, warranty, and support.
Check product warranties — Panels (25 years), Inverters (10+ years), Batteries (10 years).
Ask about monitoring systems — Real-time tracking via apps is a game-changer.
Consider future expansion — Ensure your system is scalable (more panels or batteries).

Conclusion: What’s the Real Cost of Energy Freedom?

Investing in a 10kW solar system with a battery in Australia in 2024 typically costs between $20,000 and $32,000 after incentives, depending on your location, installer, and battery brand.

While this upfront cost may seem high, the long-term savings, energy independence, and environmental impact make it a smart investment for many Australian households and businesses. With rebates and financing options available, going solar + storage has never been more accessible.

Ready to Go Solar?

If you’re considering making the switch, speak with local, trusted solar installers who can tailor a solution to your needs. Compare quotes, explore rebates, and make an informed decision that powers your home — day and night.