Fox ESS, founded in 2019 in Shenzhen, China, is a subsidiary of the Tsingshan Group, one of the world's largest stainless steel and nickel producers. This backing provides significant financial resources and supply chain advantages for battery manufacturing. The company has rapidly expanded its presence in the residential solar and storage market globally.

Fox ESS entered the Australian market in 2021, offering hybrid inverters and the ECS high-voltage battery series. The ECS batteries use compact 2.88kWh LFP modules that can be stacked from a single module up to 23kWh, providing granular sizing flexibility. The systems are designed for tight integration with Fox ESS's own H1 and H3 hybrid inverters.

The company has established a Sydney-based support team and a growing network of accredited installers across Australia. Fox ESS has gained traction among installers for its competitive pricing and straightforward installation process. The FoxCloud monitoring platform provides energy management and system oversight capabilities.

As a relatively new brand in the Australian market, Fox ESS is building its local track record. The backing of the Tsingshan Group provides financial stability, though consumers may be less familiar with the brand compared to longer-established competitors. Fox ESS appeals to value-focused buyers seeking compact, scalable storage with strong parent company backing.