Supercharge your rooftop solar with a battery
Are you among the growing number of Western Australians enjoying the benefits of rooftop solar? If the answer is yes, congratulations! It's a great first step towards making the most of your home's solar potential.
Have you considered adding a battery?
Solar panels are designed to generate electricity during the day, and they often produce more energy than your home needs.
That’s where a battery comes in – it stores excess solar energy so you can use it later, reducing your energy bills even more.
And with both State and Federal Government incentives now available, it's the perfect time to supercharge your rooftop solar by adding a battery.
Find the battery size that matches your energy habits — not just the biggest one.
When shopping for a battery, you’ll see two common terms:
- kWh (kilowatt-hours): Measures how much energy the battery can store.
- kW (kilowatts): Measures how quickly the battery charges (during the day) and discharges energy (when the sun goes down).
If your goal is to reduce your energy bills, the kWh rating is important — it tells you how much energy you can store and use later, instead of drawing from the grid.
But bigger isn’t always better. There’s no benefit in buying a large battery if you only use half its capacity. To choose the right size, check your energy usage over the past 12 months – this helps account for seasonal changes and the unique demands of Western Australia’s harsh climate.
You can also speak with an approved seller to find the right fit for your needs.
Try our solar & battery calculatorLook beyond the price tag — a strong warranty can save you more over time.
Battery systems are a long-term investment, so don’t just look at the purchase price – check the warranty too. A better warranty can save you more in the long run.
Here’s what to look for:
- Warranty length: Choose a reputable brand, with a 10–15 year warranty.
- End-of-warranty capacity: A good battery should retain at least 80% of its original capacity by the end of the warranty.
- Throughput warranty: This refers to the total energy (in MWh) the battery is guaranteed to deliver over its lifespan.
You may also like your battery to kick-in during power outages. You can choose between systems that provide power for essentials such as fridges or lights and ones that can power your entire home. While this functionality may be more expensive upfront, the added peace of mind may be worth the investment.
Make sure your chosen battery is on the Clean Energy Council’s approved list to ensure it meets Australia’s safety and quality standards.
How to maximise your savingsExplore the solar and battery rebates and interest-free finance on offer.
We know upfront costs can be a hurdle. Luckily, there are now generous rebates and financing options available:
- WA State & Federal Government Rebates: Up to $7,500 for households.
- 0% Interest Loans: Up to $10,000 for eligible WA households.
- Small Business Support: Federal rebates of up to $18,600.
Check your eligibility and see how these incentives could make a battery more affordable for you.
Do you already receive energy buyback? Adding a battery lets you store more of your solar power and benefit from improved buyback rates through Horizon Power’s Community Wave initiative.
Instead of exporting excess power to the grid during the day, you can store it and use it when the sun goes down – reducing your bill and increasing your savings.
Learn about Community Wave
See how long it takes for your battery to pay for itself using real usage data.
Adding a solar battery is a good thing for a lot of reasons, but it can be a long-term investment. Your payback period is the time it takes for your energy savings to equal the cost of the battery system.
To estimate yours, log into MyAccount and use our solar and battery calculator. It analyses your home's energy usage over the past 12 months, to help you understand potential savings and how long it’ll take to recoup your investment.
See how much you can saveHorizon Power acknowledges the Traditional Custodians throughout Western Australia and their continuing connection to the land, waters and community. We pay our respects to all members of the Aboriginal communities and their cultures; and to Elders past, present and emerging.
Aboriginal and Torres Strait Islander people are advised that this website may contain images, names or voices of deceased people.