Battery rebate WA in 2026.
Western Australia has the most generous state battery rebate in the country — and the one with the most conditions attached. Here is what you actually get.
Your rebate depends on who bills you. The WA Residential Battery Scheme pays $130 per usable kWh if you are a Synergy customer and $380 per usable kWh on Horizon Power — capped at 10 kWh, so $1,300 and $3,800 respectively. It stacks with the federal Cheaper Home Batteries Program, which takes roughly another 30% off. Joining a VPP is not optional here: it is a condition of the rebate, under a two-year agreement.
Written by Juan Flinn, Content Editor · Reviewed by the Mission Green Energy Team · Updated August 2026
Every WA battery incentive,
with its source.
These are the incentives a Western Australian household can access right now, straight from our rebate database. Each links to the government page it came from.
5.4 peak sun hrs · ~32c/kWh · typical payback 4–6 yrs
- $1,300 (Synergy) / $3,800 (Horizon) — WA Residential Battery Scheme (WA State)
Paid per kWh of usable capacity — $130/kWh for Synergy customers and $380/kWh for Horizon Power — on batteries of at least 5 kWh installed on or after 1 July 2025. The rebate caps at 10 kWh, but a larger battery is still eligible and receives the full $1,300 or $3,800. Requires joining a VPP under a two-year agreement. 100,000 rebates, expected to run to 2027 or until exhausted. Interest-free loans of $2,001-$10,000 also available (household income under $210,000). Official source - ~30% off — Cheaper Home Batteries Program (Federal)
Federal STC-based discount stacks with the WA scheme — combined roughly $3,900-$4,000 on a typical 10 kWh battery for Synergy customers, about $6,300 for Horizon Power, as at July 2026. Official source - 10c peak / 2c off-peak — Synergy DEBS feed-in tariff (WA)
10c/kWh for exports between 3pm and 9pm and 2c/kWh before 3pm or after 9pm, on the first 50 kWh exported each day. Unchanged for 2026-27. Official source
Dates that change the maths
- Federal STC step-down (2026-12-31)
Small-scale Technology Certificates drop one deeming year on 1 Jan — roughly 7–8% less off a new solar system.
Verified 16 September 2026. Figures change — each links to the government page it came from.
Synergy or Horizon
changes everything.
This is the first thing to establish, because the two figures are nearly three times apart and most national rebate articles quote only one of them.
Synergy customers — $130/kWh
Most of the south-west, including Perth, is on Synergy. The rebate is $130 per kWh of usable capacity, capped at 10 kWh, so the maximum is $1,300. Stacked with the federal discount, that comes to roughly $3,900–$4,000 off a typical 10 kWh battery as at July 2026.
Horizon Power customers — $380/kWh
Regional and remote WA is served by Horizon Power, and the rebate is nearly three times higher at $380 per kWh, to a maximum of $3,800. Combined with the federal discount that is around $6,300 off a typical 10 kWh battery. If you are on Horizon, the arithmetic for storage is unusually strong.
The cap works in your favour
The rebate caps at 10 kWh of usable capacity, but a larger battery is still eligible and still receives the full $1,300 or $3,800. That is worth understanding: unlike a scheme that scales down, going above 10 kWh here costs you nothing in rebate. Size to your evening load, not to the cap.
Minimum 5 kWh, installed from 1 July 2025
The battery must be at least 5 kWh of usable capacity and installed on or after 1 July 2025. Batteries installed before that date do not qualify retrospectively. New WA technical requirements also apply to batteries installed from 1 May 2026, so confirm your chosen unit is on the current approved list.
The VPP here
is not optional.
In New South Wales the VPP incentive is a separate payment you can decline. In Western Australia, joining a Virtual Power Plant under a two-year agreement is a condition of receiving the rebate at all. If you take the money, you are agreeing that someone else can dispatch your battery for two years.
For most households that is a reasonable trade, and it is the honest reason the WA rebate is as generous as it is — the state is buying access to distributed storage, not simply subsidising your power bill. But it does mean the rebate is a poor fit for one specific buyer: the household purchasing a battery primarily for blackout resilience. A battery that a VPP operator has discharged into the evening peak is not necessarily full when the outage arrives. Read the dispatch terms and the reserve settings before you sign.
There is also a real cap on the scheme itself: 100,000 rebates, expected to run to 2027 or until they are exhausted. That is genuine scarcity rather than sales pressure — but it is scarcity measured in tens of thousands of installations, not days, so it is not a reason to accept a bad quote this week.
A 10c peak window
changes the strategy.
Western Australia's feed-in tariff is structured by time of day, which is unusual and genuinely affects how a battery should be used.
What DEBS actually pays
Synergy's Distributed Energy Buyback Scheme pays 10c/kWh for exports between 3pm and 9pm, and 2c/kWh outside that window, on the first 50 kWh exported each day. Those rates are unchanged for 2026–27.
Why that is not a reason to skip the battery
WA grid power runs around 32c/kWh — the highest of any state we service. Even at the 10c peak rate, using your own stored energy still avoids roughly three times what exporting it earns. Outside the window, at 2c, it is closer to sixteen times.
It does change when you discharge
A well-configured battery in WA is not simply "charge by day, discharge at night". The 3pm–9pm window is worth five times the off-peak rate, so there is a real question about how much you export into it versus hold for later. This is a settings decision, and a good installer should walk you through it rather than leaving the defaults.
Best sun in the country, too
At 5.4 peak sun hours WA has the strongest generation of any state we service, alongside the highest grid tariff. That combination is why typical payback here lands around 4–6 years even before the state rebate is counted.
WA battery rebates,
answered.
How much is the WA battery rebate in 2026?
It depends on your electricity provider, because the scheme pays per kilowatt-hour of usable capacity: $130/kWh for Synergy customers and $380/kWh for Horizon Power customers, capped at 10 kWh — so a maximum of $1,300 on the Synergy grid and $3,800 with Horizon Power. It stacks with the federal Cheaper Home Batteries Program, which brings the combined saving to roughly $3,900-$4,000 for a typical 10 kWh battery on Synergy, or about $6,300 with Horizon Power, as at July 2026. Two things keep those numbers honest: the federal component is calculated on usable capacity and steps down over the life of the program, so the combined figure drifts down at each reset; and the WA rebate arrives through your approved vendor, who applies it on your behalf — you should see both discounts itemised separately on the quote rather than blended into one vague “government rebate” line.
Do I have to join a VPP to get the WA battery rebate?
Yes. Joining a Virtual Power Plant under a two-year agreement is a condition of the WA Residential Battery Scheme, not an optional extra — unlike NSW, where the VPP payment is itself the incentive. Synergy customers join Synergy Battery Rewards or an approved alternative product; Horizon Power customers join Community Wave. During the agreement the operator can dispatch your battery to support the grid — Synergy's product, for example, is limited to around 30 activation events a year of up to six hours each, and grid support discharges the battery the same way running your home does. After the two years you can opt out at any time and keep the rebate. If you are buying a battery mainly for blackout backup, read the dispatch and reserve terms closely before committing: a battery called on during a peak event may not be full when an outage follows, and the contract, not the brochure, governs that.
Is a bigger battery still eligible for the WA rebate?
Yes. The rebate is capped at 10 kWh of usable capacity, but a larger battery remains eligible and still receives the full $1,300 or $3,800 — going above 10 kWh costs you nothing in state rebate. The federal discount keeps growing past that point, at its full rate up to 14 kWh usable and at reduced rates up to 28 kWh and again to 50 kWh, so a 13-15 kWh battery is often the sweet spot where both schemes pay well against the price. Size the battery to your actual evening and overnight consumption rather than to either cap: an oversized battery that never fills earns nothing on its unused capacity, while an undersized one leaves you buying peak-price grid power every night. Your quote should show the state and federal amounts separately, calculated on the specific model's usable — not nominal — capacity, because the two figures differ on almost every battery sold.
What is the minimum battery size for the WA rebate?
At least 5 kWh of usable capacity, installed on or after 1 July 2025 — batteries installed before that date are not eligible retrospectively, and there is no way around the cutoff. The battery must be on the Clean Energy Council approved list and meet Synergy or Horizon Power technical and compliance standards, and the installation has to satisfy Western Power or Horizon Power connection requirements. New minimum technical standards also apply to all systems installed or upgraded in the South West Interconnected System from 1 May 2026 — including remote disconnection and reconnection capability for anyone on an export product — so confirm the unit you are quoted meets the current standard rather than a 2025 spec sheet. The practical check is simple: an approved vendor submits the rebate application on your behalf, so a seller who cannot do that is not actually part of the scheme.
What is the WA feed-in tariff in 2026?
Synergy's Distributed Energy Buyback Scheme pays 10c/kWh for exports between 3pm and 9pm and 2c/kWh outside that window, on the first 50 kWh exported each day — rates unchanged for 2026-27. The shape of that tariff is the real message: WA pays five times more for evening exports than midday ones because the grid is saturated with midday solar. And because grid power costs around 32c/kWh, storing your own solar still beats exporting it even inside the 10c peak window — a stored kilowatt-hour avoids a 32c purchase, while an exported one earns 10c at best. That arithmetic is exactly why the battery scheme exists: a battery shifts your midday surplus into the evening, where it is worth the most to both you and the network. If someone quotes your battery savings calculated at the 2c export rate, they are quietly flattering the battery — insist on the working.
Will the WA battery rebate run out?
It is capped at 100,000 rebates and expected to run until 2027 or until the funding is exhausted, whichever comes first. That is a real limit rather than a sales tactic — but it is measured in tens of thousands of installations, so it should not pressure you into signing a poor quote this week. The 100,000 figure is itself the expanded allocation: the scheme grew from an original 20,000 places once the federal battery program launched. Alongside the rebate, no-interest loans of $2,001-$10,000 over three to ten years are available for households with gross income under $210,000, administered by Plenti, and the loan can also cover new or upgraded inverters and panels as long as they are installed together with the battery. If the scheme does approach exhaustion, expect the notice on the official wa.gov.au scheme page — not in a salesperson's countdown timer.
Next steps
worth taking.
Run the WA numbers in the rebate checker · Our Western Australia coverage · Tesla Powerwall Perth · What size battery under the tiered rebate? · Is a home battery worth it in 2026?