FOX ESS home battery
FOX ESS ECS2900 / ECS4800
The FOX ESS ECS2900 / ECS4800 is a home battery with 12 models on the Clean Energy Council approved list as at 23 Sept 2026, with usable capacity from 5.18 kWh to 29.35 kWh.
Key specs
- Module capacity (ECS4800)
- 4.74kWh capacity
- Scalability (ECS4800)
- Scalable to 33.24 kWh
- Module capacity (ECS2900)
- 2.88kWh capacity
- Modules
- Max. 7 Modules in Series
- Battery type
- LiFePO4 Prismatic Cell
- Ingress protection
- IP65
- Operating temperature
- -20 ~ 55 °C
Copied from FOX ESS's own datasheet, checked 9 Oct 2026. Figures can differ between models in the range. Open the datasheet
Questions to ask installers about the ECS2900 / ECS4800
- 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 ECS2900 / ECS4800 models
12 current models
| Model | Usable capacity | Nominal capacity | Approved until |
|---|---|---|---|
| ECS2900-H2 | 5.18 kWh | 5.76 kWh | 2 Jan 2027 |
| ECS2900-H3 | 7.78 kWh | 8.64 kWh | 2 Jan 2027 |
| ECS4800-H2 | 8.39 kWh | 9.32 kWh | 2 Jan 2027 |
| ECS2900-H4 | 10.37 kWh | 11.52 kWh | 2 Jan 2027 |
| ECS4800-H3 | 12.58 kWh | 13.98 kWh | 2 Jan 2027 |
| ECS2900-H5 | 12.96 kWh | 14.4 kWh | 2 Jan 2027 |
| ECS2900-H6 | 15.55 kWh | 17.28 kWh | 2 Jan 2027 |
| ECS4800-H4 | 16.78 kWh | 18.64 kWh | 2 Jan 2027 |
| ECS2900-H7 | 18.14 kWh | 20.16 kWh | 2 Jan 2027 |
| ECS4800-H5 | 20.97 kWh | 23.3 kWh | 2 Jan 2027 |
| ECS4800-H6 | 25.16 kWh | 27.96 kWh | 2 Jan 2027 |
| ECS4800-H7 | 29.35 kWh | 32.6 kWh | 2 Jan 2027 |
More from FOX ESS
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 FOX ESS. 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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