SAJ home battery
SAJ B2S
The SAJ B2S is a home battery with 10 models on the Clean Energy Council approved list as at 23 Sept 2026, with usable capacity from 12.8 kWh to 51.2 kWh.
Key specs
- Capacity per stack
- One Stack= 51.2 kWh Max
- Rated power
- Up to 25.6kW rated power per stack
- Chemistry
- LFP (Lithium Iron Phosphate) cells
- Ingress protection
- IP65
- Cycle life
- 6,000+ cycle life
- Warranty
- 10-year warranty
Copied from SAJ's own product page, checked 9 Oct 2026. Figures can differ between models in the range. SAJ product page
Questions to ask installers about the B2S
- 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 B2S models
10 current models
| Model | Usable capacity | Nominal capacity | Approved until |
|---|---|---|---|
| B2-12.8-HV1-S | 12.8 kWh | 12.8 kWh | 31 Dec 2027 |
| B2-19.2-HV1-S | 19.2 kWh | 19.2 kWh | 31 Dec 2027 |
| B2-19.2-HV2-S | 19.2 kWh | 19.2 kWh | 31 Dec 2027 |
| B2-25.6-HV1-S | 25.6 kWh | 25.6 kWh | 31 Dec 2027 |
| B2-25.6-HV2-S | 25.6 kWh | 25.6 kWh | 31 Dec 2027 |
| B2-32.0-HV1-S | 32 kWh | 32 kWh | 31 Dec 2027 |
| B2-32.0-HV2-S | 32 kWh | 32 kWh | 31 Dec 2027 |
| B2-38.4-HV1-S | 38.4 kWh | 38.4 kWh | 31 Dec 2027 |
| B2-44.8-HV1-S | 44.8 kWh | 44.8 kWh | 31 Dec 2027 |
| B2-51.2-HV1-S | 51.2 kWh | 51.2 kWh | 31 Dec 2027 |
More from SAJ
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 SAJ. 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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