Alpha ESS SMILE-S5 battery rebate
6 of 6 models are on the approved list. Rebates below assume installation in May–Dec 2026 at $38 per STC. The earliest listing expiry is 12 October 2027.
Models and rebates
| Model | Usable | Nominal | Listing | Rebate now | From Jan–Jun 2027 | |
|---|---|---|---|---|---|---|
| SMILE-S5 (AS4777-2 2020) | 4.79 kWh | 5.04 kWh | Approved until 12 October 2027 | $1,216 | $1,026 | Rebate · How long it lasts |
| SMILE-S5 II (AS4777-2 2020) | 9.58 kWh | 10.08 kWh | Approved until 12 October 2027 | $2,470 | $2,052 | Rebate · How long it lasts |
| SMILE-S5 III (AS4777-2 2020) | 14.36 kWh | 15.12 kWh | Approved until 12 October 2027 | $3,648 | $3,078 | Rebate · How long it lasts |
| SMILE-S5 IV (AS4777-2 2020) | 19.15 kWh | 20.16 kWh | Approved until 12 October 2027 | $4,408 | $3,686 | Rebate · How long it lasts |
| SMILE-S5 V (AS4777-2 2020) | 23.94 kWh | 25.2 kWh | Approved until 12 October 2027 | $5,130 | $4,294 | Rebate · How long it lasts |
| SMILE-S5 VI (AS4777-2 2020) | 28.73 kWh | 30.24 kWh | Approved until 12 October 2027 | $5,814 | $4,864 | Rebate · How long it lasts |
Source: CEC approved batteries list via the Clean Energy Regulator. Always check the exact model number on your quote.
SMILE-S5 IV (AS4777-2 2020): rebate by install date
Questions
Is the Alpha ESS SMILE-S5 eligible for the federal battery rebate?
Yes. 6 of the 6 Alpha ESS SMILE-S5 models are on the Clean Energy Council approved batteries list as at 9 November 2026. The exact model number on your quote must match one on the list on your installation date.
How much is the rebate on a Alpha ESS SMILE-S5?
For the SMILE-S5 IV (AS4777-2 2020) (19.15 kWh usable), about $4,408 if installed in May–Dec 2026, at $38 per STC. The table above shows every model.
What happens on 1 January 2027?
The STC factor drops from 6.8 to 5.7. The same SMILE-S5 IV (AS4777-2 2020) would get about $3,686, $722 less. The date that counts is when it's installed and commissioned.