Solar batteries in WA, is it worth it?
A battery lets a WA home use its own solar power after dark instead of buying from the grid. WA is one of the better states for batteries, with a state rebate on offer. This is a clear, no-jargon guide to how solar batteries work, what they cost, the support available, and whether one stacks up for your home.
- Independent and WA-focused
- No jargon
- Checked May 2026
The short answer
A solar battery stores the surplus power your panels generate during the day so you can use it in the evening, rather than exporting it cheaply and buying grid power back at a higher rate after dark. WA is a strong state for batteries: alongside a federal scheme, WA has its own battery rebate, and because the WA feed-in scheme pays little for midday exports, storing your solar is often worth more than exporting it. Whether a battery is worth it depends mostly on your evening power use, and a quote that models your usage is the best way to know.
How a solar battery works
Solar panels generate the most power in the middle of the day, which is often not when a household uses the most. Without a battery, that midday surplus flows out to the grid, and you are credited for it at the feed-in rate. Then in the evening, when your panels have stopped generating, you buy power back from the grid at the usual retail rate.
A battery changes that. Instead of exporting the daytime surplus, it stores it. When the sun goes down and your home still needs power, it draws from the battery rather than the grid. In effect, the battery shifts your own solar power from the daytime, when you generate it, to the evening, when you need it.
What a solar battery costs in WA
Battery cost depends mainly on capacity, measured in kilowatt-hours, and on the brand and the installation. The figures below are a rough guide based on current WA market pricing, before rebates are applied.
Cost figures are indicative, based on current WA market data, checked May 2026. They are not a quote. Your actual price depends on the battery and your home.
Battery support in WA
WA is one of the better states for battery support, because there are two schemes, a national one and a WA one, and they can be combined.
The federal scheme
The Australian Government runs a national scheme that reduces the upfront cost of an eligible home battery. It works through the same certificate mechanism as the solar panel scheme, your installer claims the certificates and applies the value as a discount on the battery price. The value per unit of storage steps down over time, so a current quote is the best guide to what it is worth.
The WA battery rebate
On top of the federal scheme, WA runs its own residential battery rebate. It pays a set amount per kilowatt-hour of battery capacity, and the amount depends on whether your electricity provider is Synergy or Horizon Power. The two schemes can be claimed together, which is what makes WA a strong state for batteries. The detail is in the date-stamped block below.
The WA Residential Battery Scheme, current detail
- Synergy customers: a rebate of $130 per kWh of battery capacity, up to a maximum of $1,300.
- Horizon Power customers: a rebate of $380 per kWh of battery capacity, up to a maximum of $3,800.
- How it applies: the rebate is capped at 10kWh of capacity and applies to approved battery systems from 5kWh and above.
- Virtual Power Plant: to receive the rebate, your battery must join an approved Virtual Power Plant. The agreement runs for two years, after which you can opt out.
- Interest-free loan: an interest-free loan is also available to eligible households to help cover the remaining cost.
- Combined with the federal scheme: the WA rebate is on top of the federal battery support, so the two stack.
Last checked: May 2026. The WA Residential Battery Scheme launched on 1 July 2025 and runs until a set number of rebates is reached. Scheme detail, the federal scheme value, and eligibility rules are reviewed and can change. Confirm the current position with your installer when you get a quote.
See a battery costed for your home
A quote models a battery against your actual usage and applies the WA and federal support.
Get a WA solar quote→Is a solar battery worth it in WA?
A battery suits some WA homes well and others less so. An honest look at where it fits is worth more than a blanket yes, though WA's combination of a state rebate and a low daytime feed-in rate tilts the case in favour for many homes.
A battery tends to suit you if
- You use a lot of power in the evening, after your panels stop generating
- You already have, or are installing, a solar system that generates surplus
- You are comfortable joining a Virtual Power Plant, which the WA rebate requires
- You plan to stay long enough to see the savings build up
Worth thinking carefully if
- Most of your power use is during the day, when solar already covers it
- Your budget cannot stretch to the upfront cost, even after the support
- Your solar system is small and generates little surplus to store
- You may move home before the savings catch up
The clearest way to judge it is a quote that models a battery against your real usage. A good installer will tell you honestly if a battery does not stack up for your household.
WA solar battery FAQ
How much does a solar battery cost in WA?
As a rough guide, a common 10kWh home battery in WA is broadly in the region of $11,000 installed before rebates, depending on the brand and the installation. State and federal support then reduce this meaningfully. A quote gives the accurate figure for your home and battery.
What battery rebate is available in WA?
WA has two forms of support that stack. A federal scheme reduces the upfront cost through a certificate mechanism applied by your installer. On top of that, the WA Residential Battery Scheme pays a set amount per kWh of capacity, up to $1,300 for Synergy customers and up to $3,800 for Horizon Power customers, capped at 10kWh. Confirm the current detail when you get a quote.
Do I have to join a Virtual Power Plant?
To receive the WA Residential Battery Scheme rebate, yes. Your battery must join an approved Virtual Power Plant, a network that can draw on your battery at times of high demand. The agreement runs for two years, after which you can opt out. Your installer can explain what taking part involves.
Is a battery worth it in WA?
WA is a strong state for batteries. The state rebate reduces the upfront cost, and because the WA feed-in scheme pays little for midday exports, storing your solar to use in the evening is often worth more than exporting it. It still depends on your evening power use, so a quote that models your usage is the best way to know.
Can I add a battery to an existing solar system?
Often yes. Whether it is straightforward depends on your existing inverter. Some inverters are already battery-ready, while in other cases additional equipment or a reconfiguration is needed, which affects the cost. An installer can check your current system and tell you what adding a battery would involve.
Related guides
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