AlphaESS home battery
AlphaESS SMILE-S5
The AlphaESS SMILE-S5 is a home battery with 11 models on the Clean Energy Council approved list as at 23 Sept 2026, with usable capacity from 4.79 kWh to 28.73 kWh.
Key specs
- Nominal output power
- 5000 W
- Battery module
- 5.04 kWh
- Expandable to
- 30.24 kWh
- Chemistry
- LFP (LiFePO4)
- Warranty
- 5 years product, 10 years battery performance
Copied from AlphaESS's own datasheet, checked 1 Oct 2026. Figures can differ between models in the range. Open the datasheet
Questions to ask installers about the SMILE-S5
- Which size suits my usage, and is that usable capacity or nominal capacity?
- Which inverter will it run with, and does my existing solar need to change?
- Will it keep power on in a blackout, and which circuits are backed up?
- What does the warranty cover, for how long, and is there a throughput or cycle limit?
- Where will it be installed, and does that location suit its protection rating?
- Can I add capacity later, and can it join a virtual power plant?
Our home battery guide explains each of these, and the battery cost guide covers what affects the price.
Approved SMILE-S5 models
11 current models
| Model | Usable capacity | Nominal capacity | Approved until |
|---|---|---|---|
| SMILE-S5 | 4.79 kWh | 5.04 kWh | 12 Oct 2027 |
| SMILE-B5 II | 9.58 kWh | 10.08 kWh | 12 Oct 2027 |
| SMILE-S5 II | 9.58 kWh | 10.08 kWh | 12 Oct 2027 |
| SMILE-B5 III | 14.36 kWh | 15.12 kWh | 12 Oct 2027 |
| SMILE-S5 III | 14.36 kWh | 15.12 kWh | 12 Oct 2027 |
| SMILE-B5 IV | 19.15 kWh | 20.16 kWh | 12 Oct 2027 |
| SMILE-S5 IV | 19.15 kWh | 20.16 kWh | 12 Oct 2027 |
| SMILE-B5 V | 23.94 kWh | 25.2 kWh | 12 Oct 2027 |
| SMILE-S5 V | 23.94 kWh | 25.2 kWh | 12 Oct 2027 |
| SMILE-B5 VI | 28.73 kWh | 30.24 kWh | 12 Oct 2027 |
| SMILE-S5 VI | 28.73 kWh | 30.24 kWh | 12 Oct 2027 |
More from AlphaESS
Before you choose
Source: Clean Energy Council approved products lists, data as at 23 Sept 2026. Approval means a product meets the standards needed to be installed with government small-scale technology certificates (STCs). It isn't a recommendation, and Energy Quotes doesn't rank products. Check the manufacturer's datasheet and ask your installer before you buy.
Energy Quotes isn't affiliated with AlphaESS. Listing a product doesn't mean participating installers sell it. Mention it in the quote form and installers will tell you whether they can supply it.
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