If you’re planning a NSW install in 2027, the answer depends on how much spare solar you’d have to store, when you use it, what you pay for grid electricity and what the battery costs after any rebate.
What a battery changes
Without a battery, any solar you don’t use gets exported to the grid. With a suitably designed battery, some of that surplus can be stored for later.
That can cut what you buy from the grid in the evening. But storage isn’t perfect. Batteries lose some energy in conversion and have capacity limits, minimum operating requirements and warranty conditions.
Compare savings with and without storage
Start with solar only: how much you generate, use yourself and export. Then work out how much a battery could realistically store and discharge each day, after losses.
The battery’s extra benefit is the grid electricity it helps you avoid buying, minus the export credits you give up and any extra running costs. Compare that extra benefit with the extra cost of the battery.
Use NSW feed-in tariffs correctly
IPART’s published all-day benchmark for 2026–27 is 3.4–6.5 cents per kWh. Retailers don’t have to offer a rate within that benchmark.
Your energy plan, time-of-use tariff and any battery program could change the numbers. Look at the whole retail plan, not just the export rate.
Government incentives and the 2027 question
Australian renewable energy incentives and battery program rules can change. The Clean Energy Regulator explains certificate-based support and eligibility requirements.
Check the official program rules, installer eligibility, battery size requirements and the offer that applies on your actual installation date. Don’t assume 2026 support or quotes will still be the same in 2027.
When a battery may make more sense
A battery may suit you if you use a lot of power in the evening, have solar to spare, pay high evening rates or want some protection from outages.
If you export very little solar during the day, there’s less to store. Outage protection may also need specific equipment and a backup circuit design. A battery on its own does not guarantee whole-home backup.
When solar-only may be the simpler answer
For some homes, using solar directly and running appliances at the right times makes a stronger starting case than paying extra for storage.
There’s nothing wrong with starting with solar and revisiting storage later, as long as the design allows for adding a battery down the track.
Compare before committing
Generic savings claims can’t account for your roof, your electricity plan or your daily habits. EnergyBrain can give you an indicative solar report for your own home first, so you can decide whether a detailed design or installer quote is worth chasing. No pressure.
Frequently asked questions
Will a battery run my whole home during a blackout?
Only if the system has suitable backup functionality and the installed design supports the circuits and loads you need.
Do batteries always improve solar payback?
No. They can lift self-consumption but add to the installation cost. Work out the extra return.
Are 2027 rebates confirmed?
Check the official rules close to your installation date. Incentive values and eligibility can change.
Keep reading
Independent resources
Editorial note (October 2026): Financial examples are explanatory, not quotes or guaranteed savings. Rates, prices, rebates, installation requirements and incentives must be checked again for the date and location of any proposed installation. This article provides general information, not personalised financial advice.