plug-in solar battery · checked 2026-09-03
Fox ESS MiniQube
A compact battery that scales from 2 to 10.5 kWh, takes solar panels directly, and can even run appliances from its own socket off-grid. Fox ESS is unusually honest: until battery plug-in rules exist, it must go on a dedicated circuit under existing wiring and grid rules.
UK rules check
Rules checked. Maker's UK position verified: dedicated circuit under current wiring rules, grid standard G98 where applicable. No blanket plug-in approval claimed. Page read via archived copy 2026-08-08; live page returned an error on 2026-09-03.
Checked 2026-09-03
Price snapshot
No confirmed price yet
No price published on the maker page.
Source: Fox ESS UK MiniQube page · checked 2026-09-03
Works with or without a meter; a wired meter gives fuller tariff control, a wireless one is in testing. Phone-app scheduling included.
Who it suits
- Flats and retrofits where a small, simple box beats a full install
- Solar self-use by day plus cheap-tariff charging by night
- Anyone who wants a battery that can also leave the house as portable power
Who should skip it
- Anyone expecting a settled plug-in rulebook: Fox ESS says the framework isn't defined yet
- Whole-home backup at the small end: 2 kWh covers essentials only
- Buyers who need a price today: none is published
- Rare honesty: the maker spells out the regulatory gap instead of hiding it
- Grows in small steps from 2 to 10.5 kWh
- Panels plug in directly; doubles as portable power
- Still needs a dedicated circuit under current UK rules: not casual plug-and-play
- No published price
- Battery chemistry and warranty need confirming per configuration
Common questions
Can I just plug the MiniQube into any socket?
The box is designed for it, but Fox ESS's own UK guidance says: until plug-in battery rules exist, install on a dedicated circuit following current wiring regulations and grid standard G98 where it applies. Ask an electrician.