DIRECT ANSWER
The current specification draws an explicit boundary around plug-in batteries.
The final specification covers plug-in solar, and excludes plug-in batteries and solar PV devices integrated with battery systems.
That distinction is easy to miss among similar product names. A European installation example does not establish a permitted British connection.
We show the evidence status in our database and do not give a UK-compliant badge based only on a retailer description.
Read the related practical guide.
Primary sources
Some retailer links are affiliate links. We may receive a commission if you make a purchase through them, at no additional cost to you. This does not affect the prices or compliance information shown.