Rebate clock: the federal battery discount drops ~$599 on a 13.5 kWh install on 1 Jan 2027.89d:18h:56m:33sCheck yours before the drop
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WA battery rebate · verified 13 July 2026

WA solar battery rebate 2026

A 13.5 kWh battery in Western Australia attracts $3,631 from the federal Cheaper Home Batteries Program plus $1,300 from the WA Residential Battery Scheme (Synergy customers): $4,931 off, verified 13 July 2026.

457,439 batteries installed under the federal program, year one
1 in 17 Aussie homes now have one
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WA battery rebate stack · 13.5 kWh battery
Federal Cheaper Home Batteries discount6.8 STCs per usable kWh
$3,631
WA Residential Battery Scheme (Synergy customers)$130/kWh, capped
$1,300
Total off a 13.5 kWh battery in WA
$4,931

What a battery costs in WA after the rebate

Four common sizes, with the federal discount, the WA incentive and what is left to pay. Installed prices are the range across the battery models we track, checked 13 July 2026; rebate figures are computed at today's 6.8 STCs per usable kWh.

Usable capacity Federal rebate WA incentive Typical installed price Price after rebates
10 kWh $2,713 $1,300 $7,000–$13,500 $2,987–$9,487
13.5 kWhmost common $3,631 $1,300 $7,800–$14,500 $2,869–$9,569
15 kWh $3,950 $1,300 $7,500–$12,500 $2,250–$7,250
20 kWh $4,748 $1,300 $10,000–$20,600 $3,952–$14,552

Installed prices are derived from our own brand price table, derived from the models listed below, checked 13 July 2026; they are planning estimates, not quotes. Each range reflects the actual products sold at that size, which is why a value 15 kWh stack can undercut a premium 13.5 kWh all-in-one unit. No single product is sold at 20 kWh, so that row is scaled at $500–$1,029 per usable kWh, from Sungrow SBR HV, BYD Battery-Box Premium HVS, Sigenergy SigenStor, Growatt APX. Federal figures are gross certificate values at the current spot price; installers typically pass through slightly less after certificate admin fees. More detail on solar battery prices and on the best home batteries for Australian homes.

The WA rebate falls 1 January 2027

The federal discount is on a legislated staircase, not a sales deadline. Today's factor is 6.8 STCs per usable kWh. On 1 January 2027 it drops to 5.7, taking a 13.5 kWh battery in WA from $3,631 to $3,032, a difference of $599 for exactly the same install. That single date is why "Is the solar battery rebate reduction in 2026?" is the most common question people ask alongside this one, and it is the question the results page below answers first.

The rate is set by the date on your certificate of electrical compliance, not the day you sign the contract, so a quote taken in December with a January install gets January's rate.

03 · The rebate clock

The battery rebate falls every six months. On a schedule.

This is not marketing pressure, it is legislation. The federal factor is 6.8 STCs per usable kWh until 31 December 2026, drops to 5.7 on 1 January 2027, and keeps stepping down until the program ends in 2030. On a 13.5 kWh battery, that first step alone is worth about $599.

You are here
6.8 STCs/kWh
May–Dec 26
$3,631
5.7 STCs/kWh
Jan–Jun 27
$3,032
5.2 STCs/kWh
Jul–Dec 27
$2,793
4.6 STCs/kWh
Jan–Jun 28
$2,474
4.1 STCs/kWh
Jul–Dec 28
$2,195
3.6 STCs/kWh
Jan–Jun 29
$1,915
3.1 STCs/kWh
Jul–Dec 29
$1,636
2.1 STCs/kWh
…2030
$1,117

Source: DCCEEW, Cheaper Home Batteries Program. Schedule verified 13 July 2026, reviewed at least annually by the regulator.

See what you'd get before the drop Solar STCs step down separately every 1 January until 2030.

Every WA battery program, with its live status

WA adds $1,300 through the WA Residential Battery Scheme (Synergy customers). Here is each WA program that touches home batteries, checked against its official source on 13 July 2026.

WA Residential Battery Scheme, Synergy customers

Live
$130 per usable kWh, capped at $1,300 (10 kWh)

Point-of-sale rebate for Synergy customers (Perth and the South West grid). Requires joining a Virtual Power Plant with a 2-year commitment. Stacks with the federal Cheaper Home Batteries Program: combined value on a 10 kWh battery is about $3,800 today. Around 100,000 rebates are funded, expected to last into 2027.

Eligibility: Owner-occupier Synergy customer; solar PV installed or installed together; usable battery capacity 5–10 kWh (larger batteries still get the capped amount); accredited installer; mandatory VPP participation for 2 years.
Source: WA Government, Residential Battery Scheme

WA Residential Battery Scheme, Horizon Power customers

Live
$380 per usable kWh, capped at $3,800 (10 kWh)

Larger per-kWh rebate for Horizon Power customers in regional and remote WA. Combined with the federal discount, a 10 kWh battery attracts about $6,300 in stacked support today.

Eligibility: Horizon Power network customer; battery 5–10 kWh usable; VPP enrolment where available.
Source: WA Government, Residential Battery Scheme

WA Residential Battery Scheme, no-interest loan

Live
0% loan, $2,001–$10,000

Interest-free loan for the battery purchase alongside the rebate, repaid over up to 10 years.

Eligibility: Household income under $210,000; approved battery under the scheme.
Source: WA Government, Residential Battery Scheme

How to claim the WA battery rebate

  1. Nothing to lodge for the federal discount. Your accredited installer creates the 91 certificates a 13.5 kWh battery earns, assigns them, and takes the value off the quote before you pay. Check it appears as its own line, worth roughly $3,631 at this size.
  2. Confirm the product and the installer. The battery has to be on the Clean Energy Council approved list, 5 to 100 kWh nominal, paired with new or existing solar, and VPP-capable if you are on-grid. One claim per premises, ever.
  3. WA Residential Battery Scheme (Synergy customers). Arranged through your installer or VPP provider at signup rather than claimed back afterwards, worth $1,300 at 13.5 kWh. Two years of VPP participation is a condition, not an optional extra. Compare the WA VPPs →
  4. WA Residential Battery Scheme (Horizon Power customers). Worth up to $3,800, but currently open to Horizon Power network customers in regional and remote WA. If that is you, say so before the quote is written, because it is delivered through participating retailers and installers rather than claimed back.
  5. WA Residential Battery Scheme no-interest loan. A real application you make yourself: interest-free , $2,001 to $10,000. Get approval before you commit to the install.
  6. Check the certification date. The rebate rate is fixed by the compliance certificate, so an install that slips past 1 January 2027 is worth $599 less.
Run your own WA numbers

The calculator opens pre-set to WA (Perth, postcode 6000). Change the postcode, bill and battery size and it restacks the federal discount, solar STCs and any live WA incentive instantly. No email needed.

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WA battery rebate questions

Is a solar battery worth it in WA?

On the numbers, a 13.5 kWh battery in Western Australia costs about $2,869 to $9,569 after $4,931 of rebates, and our savings engine estimates the extra saving from adding it to existing solar at $680 to $830 a year at WA's average $420 quarterly bill. That is roughly a 3 to 14 year payback, before any VPP income. WA uses a regulated, time-of-export feed-in tariff (DEBS): 2c/kWh off-peak and 10c/kWh during the 3–9pm peak for Synergy customers, on the first 50 kWh/day. The case is strongest where you use most of your power after dark; it is weakest if you are out all evening and export everything.

Does the WA Government offer a solar battery rebate in 2026?

Yes. The WA Residential Battery Scheme (Synergy customers) is live: $1,300 on a 13.5 kWh battery ($130 per usable kWh, capped at $1,300). It stacks on top of the federal Cheaper Home Batteries discount of about $3,631, for $4,931 off in total. Verified against WA Government, Residential Battery Scheme on 13 July 2026.

How much should a 10kWh battery cost?

Between $7,000 and $13,500 fully installed before rebates, based on the 10 kWh-class models we track (BYD Battery-Box Premium HVS, GoodWe Lynx Home F, sonnenBatterie Evo, Fox ESS EQ4800 (~10 kWh)), priced 13 July 2026. Take off the federal $2,713 and WA's $1,300 and a WA household pays about $2,987 to $9,487. If a quote sits well above that, ask what the battery discount line says and when it was calculated.

Is the solar battery rebate reduction in 2026?

It already happened once and happens again shortly. The federal factor fell from 8.4 to 6.8 STCs per usable kWh on 1 May 2026, and drops to 5.7 on 1 January 2027. On a 13.5 kWh battery that is $3,631 now versus $3,032 after, a difference of $599 for an identical install. The schedule is legislated and keeps stepping down every 1 January and 1 July until the program ends on 31 December 2030. What counts is the certification date, not the day you sign.

How long will a 10kWh battery last?

Two answers. Overnight: a 10 kWh battery covers most of an average WA household's evening and overnight usage, on a bill averaging $420 a quarter ($1,680 a year), which is why 10 to 15 kWh is the size most households land on. Over its life: every battery in our price list carries a 10-year warranty, and the longest-warranted model we track is guaranteed to 10,000 cycles, so plan on 10 to 15 years of useful service with gradual capacity fade.

What are the requirements to qualify for the WA Residential battery Scheme rebate?

You must be an owner-occupier on the Synergy or Horizon Power network, have solar already or installed at the same time, use an accredited installer and an approved battery of 5 to 10 kWh usable capacity, and join a Virtual Power Plant for two years. Synergy customers get $130 per usable kWh capped at $1,300; Horizon Power customers get $380 per kWh capped at $3,800. Larger batteries still qualify, they just stop earning past the cap. An interest-free loan of $2,001 to $10,000 is available alongside it. Source: WA Government, Residential Battery Scheme, verified 13 July 2026.

What does a 10kWh battery cost in WA after both rebates?

A 10 kWh battery is typically $7,000 to $13,500 installed before rebates (BYD Battery-Box Premium HVS, GoodWe Lynx Home F, sonnenBatterie Evo, Fox ESS EQ4800 (~10 kWh), priced 13 July 2026). The federal discount takes $2,713 off and the WA Residential Battery Scheme takes another $1,300 off for Synergy customers, leaving about $2,987 to $9,487. On the Horizon Power network the state share is $3,800 instead, which lands the same battery about $2,500 lower again.

We match you with one vetted WA battery installer

Not a bidding war and not a call centre. You tell us your postcode and bill, we match you with a single CEC-accredited installer who works in Western Australia, and they quote with the federal and state discounts already applied. Free, no obligation, and we tell you if the numbers do not work for your roof.

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Next: the full WA rebate stack including solar STCs, the WA calculator, current battery prices, the best home batteries, the WA VPP comparison , and local costs for solar panels in Perth.

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