Is a home battery worth it in NSW?

A home battery is one of the most common things people ask us about. The honest answer to "is it worth it?" is: it depends on your household. The good news is that the things it depends on are fairly easy to work out, and once you understand them you'll be in a much better position to judge any quote you get.

What a home battery actually does

Solar panels make power during the day, but most homes use the bulk of their electricity in the morning and evening. Without a battery, the extra solar you don't use during the day goes back to the grid, and you buy power back from the grid at night.

A battery stores that spare daytime solar so you can use it later, when the sun's gone down or when grid power costs more. Depending on how it's set up, some systems can also keep part or all of your home running during a blackout.

The factors that decide whether it's worth it

The Australian Government's energy advice site lists the main things that affect whether a battery is cost-effective. In our experience, these are the ones that matter most.

When you use your power. If your household is out all day and uses most of its power after dark, a battery has more work to do. If someone's home during the day and already uses most of your solar as it's made, there's less spare energy to store.

How big your solar system is. A battery can only store what your panels produce beyond what you're already using. A small or older solar system may not have much left over to charge a battery, especially in winter. Sometimes the better first step is more solar, or both together.

What you pay for electricity. Your tariff type matters. If you're on a time-of-use plan where evening power costs more, shifting your usage to stored solar can make a bigger difference. Your electricity bill and plan details are worth having handy when you get a quote.

The cost of the system itself. Batteries are a significant purchase. Government incentives can reduce the upfront cost, but you still want a system sized to your actual needs rather than the biggest one available.

Blackout backup: nice to have, or a must?

Not every battery provides backup power automatically. Backup depends on the battery, the inverter and how the system is wired. Some setups back up the whole house, others only selected circuits like the fridge, lights and internet. If keeping the lights on during outages is important to you, for example on a rural property or with someone at home who relies on power, tell your installer early so the system is designed for it.

Virtual power plants (VPPs)

A virtual power plant is a network of home batteries that an energy company can draw on at busy times, usually in exchange for credits or other benefits. Not every retailer offers VPPs, and the benefits vary between providers, so it's worth checking the terms carefully. You give up some control over when your battery is used. Batteries installed under the federal discount generally need to be VPP-capable, but you don't have to join one.

What about government incentives?

The Australian Government's Cheaper Home Batteries Program provides battery STCs on eligible batteries connected to new or existing solar. Battery STCs are worth about $37 each and apply to usable capacity from 5 to 50 kWh, so for batteries installed in 2026 that's roughly $1,250 to $6,400 off, depending on system size. It's usually applied by your installer as a discount on the quote. To qualify, the battery needs to be on the Clean Energy Council's approved list and installed by a Solar Accreditation Australia (SAA) accredited installer.

The discount depends on the size of the battery, and it steps down over time based on the date your system is installed, not the date you sign a contract. The next step-down is scheduled for 1 January 2027. We apply eligible discounts directly to your quote. The old NSW Government home battery installation discount closed on 1 July 2025, so for homes the federal program is the main battery discount.

Eligible households may also be able to use the NSW Government's interest-free Home Energy Saver loan (up to $15,000, repaid over up to 10 years, when available) for a battery, and the NSW Government has announced a Home Energy Saver discount for eligible lower-income households that's coming soon. We'll check your eligibility when we quote. You can read the details on the official pages listed under Sources.

Questions to ask before you buy

• What size battery does my usage actually need, and why?
• Will it provide backup power, and for which circuits?
• Is my existing inverter and switchboard compatible, or will they need work?
• Which incentives have been included in the quote, and how were the savings estimated?
• Who will do the installation, and are they SAA accredited for batteries?

How we can help

Our in-house, SAA-accredited electricians look at your bills, your solar system and your switchboard before recommending anything. If a battery doesn't stack up for your household, we'll tell you. If it does, we'll design it around how you actually use power. Learn more about our battery storage installations or, if you're starting from scratch, our solar power systems.

Frequently asked questions