15kW Solar Battery Price in Australia: What You Need to Know in 2025

As the demand for clean and independent energy continues to rise across Australia, solar batteries are becoming an essential addition to residential and commercial solar systems. One of the most sought-after capacities today is the 15kW solar battery, providing robust energy storage for medium to large energy users.

But the big question for many homeowners and business owners is this: What is the 15kW solar battery price in Australia? And more importantly, where can you get the best deal?

At Ads Solar, we are proud to offer the best 15kW solar battery price across Sydney, Melbourne, Brisbane, Adelaide, and Canberra. In this blog, we’ll walk you through everything you need to know about this size battery, including pricing, installation, use cases, and why we’re the trusted name for solar solutions in Australia.

What is a 15kW Solar Battery?

A 15kW solar battery refers to a battery system with a storage capacity around 15 kilowatt-hours (kWh), though some may refer to it by output power. For the sake of clarity, we’ll assume this is a 15kWh storage system throughout this blog.

It is ideal for:

• Large households with high energy consumption

• Small businesses with extended operating hours

• Homes or offices with EV charging stations

• Properties seeking energy independence from the grid

This capacity can typically store enough energy to power a large home overnight or act as a reliable backup during blackouts.

Why Go for a 15kW Solar Battery?

Before diving into pricing, it’s important to understand the benefits of investing in a 15kWh battery:

1. Energy Independence

With a battery of this size, you’re significantly less reliant on the grid, which is especially valuable during outages or peak demand periods.

2. Massive Energy Storage

Whether you run a home with high consumption (pool pumps, air conditioning, electric vehicles) or a small business, this capacity provides stability and long-term cost savings.

3. Reduced Electricity Bills

Store excess solar energy during the day and use it when the sun goes down. That means lower bills and maximised use of your solar investment.

4. Backup Power During Blackouts

Never worry about power cuts again. A 15kWh solar battery can keep your essentials running during emergencies.

5. Future-Proofing

With the electric vehicle (EV) revolution and smart homes becoming the norm, installing a higher-capacity solar battery today means you’re ready for tomorrow.

What Is the 15kW Solar Battery Price in Australia?

The price of a 15kW (15kWh) solar battery in Australia can vary based on a few factors, including:

• Brand and model

• Battery chemistry (e.g., lithium-ion vs. lead-acid)

• Inverter type

• Installation requirements

• Integration with existing solar systems

✅ Typical Price Range

As of 2025, the 15kW solar battery price in Australia generally ranges between:

$11,000 — $16,000 (fully installed)

This includes:

• The battery unit

• Battery inverter (if not hybrid)

• Installation by certified professionals

• Monitoring and smart app integration

At Ads Solar, we strive to offer competitive pricing, with customised packages that include solar panels + battery storage for even greater savings.

Why Choose Ads Solar for Your 15kW Solar Battery?

With many providers in the market, why are more Australians choosing Ads Solar for their battery storage solutions?

⭐ 1. Best 15kW Solar Battery Price in Australia

We don’t just claim competitive pricing — we deliver it. We work directly with top manufacturers to bring you industry-leading battery systems at unbeatable prices.

⭐ 2. Trusted Across Major Cities

Whether you’re in:

• Sydney

• Melbourne

• Brisbane

• Adelaide

• Canberra

We have local teams and expert installers ready to serve you.

⭐ 3. Certified and Experienced Installers

Our CEC-accredited technicians ensure every system is installed to the highest Australian standards, ensuring safety, efficiency, and warranty protection.

⭐ 4. Tailored Energy Solutions

Every property is different. We assess your energy usage, solar potential, and future needs to recommend the best setup — not a one-size-fits-all.

⭐ 5. Finance Options Available

Worried about upfront costs? We offer flexible finance and $0 deposit plans, making it easier for you to make the switch.

How Much Can You Save with a 15kW Solar Battery?

Savings vary depending on your electricity usage and location. Here’s an example:

• Household Daily Usage: 25–35kWh

• Solar Generation: 20–30kWh/day

• Battery Storage: 15kWh

• Feed-in Tariff: $0.05/kWh

• Grid Power Cost: $0.30–$0.40/kWh

With a battery storing energy you’d otherwise sell for 5c/kWh (and use it instead of paying 35c/kWh), you’re saving 30c for every kWh used from your battery.

Estimated Annual Savings: $1,500–$2,500Payback Period: 5–7 years

Compatible Brands & Battery Options We Offer

At Ads Solar, we work with leading battery brands, including:

• Tesla Powerwall

• LG Chem RESU

• Sungrow Battery

• Alpha ESS

• Huawei Luna

• BYD Battery Box

All offer smart monitoring, long life cycles, and reliable performance. We help you compare and choose what best suits your needs and budget.

How the Installation Process Works

Getting started with a 15kWh battery system is easier than you think:

✅ Step 1: Free Consultation

We assess your energy needs and provide a detailed quote — no surprises.

✅ Step 2: System Design

Our team designs a tailored battery storage solution for your property and existing solar setup.

✅ Step 3: Fast Installation

Our CEC-accredited electricians install your system professionally, typically within 1–2 days.

✅ Step 4: System Walkthrough

We guide you on using your smart energy monitoring app so you can track your performance in real-time.

Is a 15kW Solar Battery Right for You?

A 15kWh battery isn’t for everyone — it’s best suited for:

• Homes using more than 25kWh/day

• Properties with existing solar systems of 10kW or larger

• Households with electric vehicles or off-peak electric appliances

• Small business premises (cafés, offices, shops)

If you’re unsure, Ads Solar offers free solar energy assessments to help you decide what size battery (if any) is right for your property.

Government Rebates and Incentives in 2025

While incentives vary by state, here are some you may benefit from:

• Solar Victoria Battery Rebate

• South Australia Home Battery Scheme (closed for new applicants but existing customers can still access services)

• Small-scale Technology Certificates (STCs)

• Local government subsidies and grants

We stay up-to-date with the latest rebates so you don’t miss out on potential savings.

FAQs About 15kW Solar Battery Price

🔋 Q: Can I add a 15kWh battery to my existing solar system?

Yes! Our team can integrate a battery with most existing systems.

🔋 Q: What’s the warranty on a 15kWh battery?

Most quality batteries come with 10 to 15 years warranty, covering performance and parts.

🔋 Q: Do I need a hybrid inverter?

Not necessarily. If your existing system doesn’t have a hybrid inverter, we can install a separate battery inverter.

🔋 Q: Will I still need grid power?

Possibly — especially during long cloudy periods — but your grid dependence will significantly reduce.

Ready to Get Started?

There’s never been a better time to invest in clean, efficient energy storage. With electricity prices rising and solar technology becoming more affordable, a 15kWh battery is a smart investment in your future.

Whether you’re in Sydney, Melbourne, Brisbane, Adelaide, or Canberra, Ads Solar is here to deliver the best 15kW solar battery price in Australia, backed by professional service and long-term value.