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Rebate Clock

AlphaESS SMILE-G3 rebate

Checked against the approved list

1 × BAT-10.1P, the smallest listed size

Waiting past 31 Dec 2026 costs $440

For the rebate, one to three modules is where the SMILE-G3 earns its keep. A fourth module adds under a fifth of what the second did, so buy it for your evening usage, not for the discount.

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VoltX Energy sells the AlphaESS SMILE-G3 in NSW, ACT, QLD, SA and VIC.

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Your battery and install date
Installed by 31 Dec 2026$2,600
Installed from 1 Jan 2027$2,160
Waiting costs you−$440

65 certificates × $40 for 9.6 kWh usable, at the May–Dec 2026 factor of 6.8. 54 certificates from 1 Jan 2027.

The factor is set by the date on the electrical compliance certificate, not the date you sign the quote.

19 batteries, every install date

Compare batteries
State and price
For state top-ups; the federal rebate is the same everywhere.
Price per certificate

The clock: this battery’s rebate by install date

  1. May–Dec ’26$2,600
  2. Jan–Jun ’27$2,160
  3. Jul–Dec ’27$1,960
  4. Jan–Jun ’28$1,760
  5. Jul–Dec ’28$1,560
  6. Jan–Jun ’29$1,360
  7. Jul–Dec ’29$1,160
  8. Jan–Jun ’30$960
  9. Jul–Dec ’30$800

How the size taper applies

  • First 14 kWh at 100%9.6 kWh
  • 14 to 28 kWh at 60%0 kWh
  • 28 to 50 kWh at 15%0 kWh

Get quotes from more than one accredited installer, and ask each to show the STC discount as its own line.

Updated 3 Oct 2026 · every figure links to its source · No provider pays us to be listed.

AlphaESS's SMILE-G3 stacks BAT-10.1P modules, each sold as 10.1 kWh and listed at 9.6 kWh usable. One to three modules earn most of the rebate; the fourth and later add little.

SMILE-G3 rebate by install date

Size (usable)May–Dec ’26Jan–Jun ’27Jul–Dec ’27Jan–Jun ’28Jul–Dec ’28Jan–Jun ’29Jul–Dec ’29Jan–Jun ’30Jul–Dec ’30
1 × BAT-10.1P9.6 kWh$2,600$2,160$1,960$1,760$1,560$1,360$1,160$960$800
2 × BAT-10.1P19.2 kWh$4,640$3,880$3,560$3,120$2,800$2,440$2,120$1,760$1,400
3 × BAT-10.1P28.7 kWh$6,120$5,120$4,680$4,120$3,680$3,240$2,760$2,320$1,880
4 × BAT-10.1P38.3 kWh$6,480$5,440$4,960$4,400$3,920$3,440$2,960$2,480$2,000
5 × BAT-10.1P47.9 kWh$6,880$5,760$5,280$4,640$4,160$3,640$3,120$2,640$2,120
6 × BAT-10.1P57.5 kWh$6,960$5,840$5,320$4,720$4,200$3,680$3,160$2,640$2,120
At $40 a certificate, excluding GST.

What each step up adds in 2026

SizeAddsRebatePer kWh
2 × BAT-10.1P 9.6 kWh +$2,040 $213
3 × BAT-10.1P 9.5 kWh +$1,480 $156
4 × BAT-10.1P 9.6 kWh +$360 $38
5 × BAT-10.1P 9.6 kWh +$400 $42
6 × BAT-10.1P 9.6 kWh +$80 $8

SMILE-G3 listings

SizeModel numberNominalUsableListed until
1 × BAT-10.1P SMILE-G3-BAT-10.1P 10.1 kWh 9.6 kWh 31 Dec 2027
2 × BAT-10.1P SMILE-G3-BAT-10.1P II 20.2 kWh 19.2 kWh 31 Dec 2027
3 × BAT-10.1P SMILE-G3-BAT-10.1P III 30.2 kWh 28.7 kWh 31 Dec 2027
4 × BAT-10.1P SMILE-G3-BAT-10.1P IV 40.3 kWh 38.3 kWh 31 Dec 2027
5 × BAT-10.1P SMILE-G3-BAT-10.1P V 50.4 kWh 47.9 kWh 31 Dec 2027
6 × BAT-10.1P SMILE-G3-BAT-10.1P VI 60.5 kWh 57.5 kWh 31 Dec 2027

How the SMILE-G3 sizes land on the taper

One BAT-10.1P module gives 9.6 kWh usable, all of it inside the first 14 kWh, where the factor applies in full. The label says 10.1 kWh, but the certificates follow the 9.6 kWh usable figure on the Clean Energy Council list.

The second module takes the stack to 19.2 kWh: 4.4 kWh of the new module still earns the full factor and the other 5.2 kWh earn 60%. The third (28.7 kWh) earns 60% on almost all of its capacity, with 0.7 kWh spilling into the 15% band.

From the fourth module on, nearly every added kilowatt-hour sits in the 15% band, and a six-module stack's 57.5 kWh runs 7.5 kWh past the 50 kWh limit, which earns nothing. Going from three modules to six adds less rebate than the second module did on its own.

Other AlphaESS batteries on the list

AlphaESS has more than a dozen battery families on the approved list. Two matter most for SMILE-G3 quotes: the BAT-10.1P modules on this page, listed at 95% usable, and the SMILE-G3-BAT-9.3S, whose 9.3 kWh label is also its usable figure. Three 9.3S modules are listed at 27.9 kWh usable, just under the 28 kWh edge, where three 10.1P modules reach 28.7.

Before you sign for a SMILE-G3

  • Make sure the quote says SMILE-G3 BAT-10.1P. The older SMILE-BAT-10.1P is a separate listing at 9.07 kWh usable per module, about half a kilowatt-hour less.
  • Count modules, not label kilowatt-hours: three modules are 28.7 kWh usable on the list, not the 30.3 kWh that three 10.1 kWh labels add up to.
  • If the installer suggests a fourth module, ask what it is for. Its rebate is small, so the case for it has to rest on your evening usage.

Rebate calculator · Eligibility rules