Plug-In Batteries Aren't Legal in the UK Yet, and Won't Be Until at Least 2028
Plug-in battery storage, a battery you’d charge up and discharge straight back into your home’s wiring through a normal wall socket, is not legal to use in the UK. It wasn’t part of the change that legalised plug-in solar on 27 August 2026, and it was left out deliberately, not by accident.
Why solar got through and batteries didn’t
Plug-in solar only pushes power one way, out, and only while the sun’s actually hitting the panel. A plug-in battery is a different kind of risk: it can discharge a sustained, much larger current back through a standard plug and socket at any time of day, charged or not, which is exactly the kind of load that standard sockets and the wiring behind them weren’t designed to carry safely in that direction. That’s the specific concern regulators flagged when solar was going through its own consultation, and it’s why batteries were pulled out of that framework rather than bundled in with it.
Where the safety review actually stands
The Department for Energy Security and Net Zero opened a procurement in August 2026 for an 18-month safety and risk assessment of plug-in battery products rated up to 800W AC output, the same power ceiling as plug-in solar. An expression of interest went out on 17 August 2026, submissions closed around 30 September, and the award decision was pencilled in for 5 October. The contract itself doesn’t conclude until 31 March 2028.
The first phase of that review looks at plug-in battery products already being sold in other markets, Germany in particular, where they’ve had a longer run on the shelves. Real units go through laboratory testing, including deliberately misusing them and pushing them into fire-risk scenarios, before anything gets near a recommendation on UK rules.
What that means for a realistic timeline
2028 is the earliest point a decision could land, and that’s an optimistic read of a process that hasn’t finished its first phase yet. If you’re hoping to add a plug-in battery this year or next, there isn’t one coming that you can legally run.
Don’t be talked into an import in the meantime
German and other European retailers do sell plug-in battery units, and some of that stock finds its way onto UK marketplaces regardless of the legal status here. Buying one and running it through a UK socket isn’t a grey area, it’s simply not compliant with UK wiring and product safety rules, whatever the listing claims. None of the safety concerns the review exists to answer have been resolved for these products, which is the entire reason to wait rather than the reason to find a workaround.
If you actually want battery storage now
None of this affects a normal, hardwired home battery, fitted on its own circuit by a registered electrician alongside or independent of solar panels. That route has existed for years, carries no such restriction, and is the only way to add battery storage to your home properly today. See our plug-in solar rules guide for what plug-in equipment can and can’t do, or get matched with vetted installers for a proper battery install.
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Frequently asked questions
Are plug-in batteries legal in the UK?
No. Plug-in solar panels became legal to self-install from 27 August 2026, but plug-in battery storage was deliberately left out of that change and remains non-compliant with UK wiring and product safety rules.
When will plug-in batteries become legal in the UK?
At the earliest, 2028. The government's safety review into plug-in battery storage runs until 31 March 2028, and any change to the rules would follow its findings, not come before them.
Can I import a plug-in battery from Germany and use it in the UK?
You can buy one, but you can't legally run it through a UK socket. UK wiring and product safety rules don't recognise these products as compliant yet, regardless of what's permitted in the market they were sold in.