One Week of Legal Plug-In Solar: What's Actually Happened in the UK

Plug-in solar has now been legal in the UK for five days. It's a good moment to step back from the "is this legal yet" questions that dominated the summer and look at what's actually happened since SI 2026 No. 848 came into force on 27 August. Stock, installs, teething problems, and how the paperwork side is coping — here's where things stand at the start of September.

The legal position, briefly

If you've landed here without the background: a "plug-in microgenerator" is now a defined legal category under UK electrical regulations, covering a single unit of up to 800VA/3.5A that plugs directly into a standard BS 1363 13A socket via a factory-fitted 5A-fused plug. No battery in the plug circuit, no extension leads, one unit per household. We've covered the full detail in our plug-in microgenerator explainer and the SI 2026 No. 848 breakdown if you need the complete picture — this article assumes you already know the basics and is about what's happened since the rule actually took effect.

Stock: better than feared, patchy in places

The bank holiday weekend launch (see our launch day guide) saw predictable first-day sell-outs at a couple of retailers, but the picture five days in is more settled than the panic-buying headlines suggested. B&Q and Screwfix both report restocking within 48 hours at most branches. Currys' online stock has been the most consistent of the major retailers, while Wickes and Lidl have seen some regional gaps — coastal and southern stores selling through faster than northern branches, which tracks with where solar payback is most attractive on paper. Amazon marketplace listings are the most volatile: third-party sellers have appeared quickly, and it's worth checking every listing against our guide to spotting a non-compliant kit before buying, since not everything showing up in search results carries a genuine BSI-compliant plug and fuse. Our full retailer rundown is in the where to buy plug-in solar guide.

EcoFlow's STREAM kit, which launched in the UK to coincide with legalisation (see our STREAM UK launch coverage), has been the standout seller of the first week — helped by the fact it was designed around the exact 800VA/3.5A ceiling from the outset rather than adapted from an EU spec afterwards.

DNO notifications: the process is holding up, just about

Every plug-in microgenerator install still requires a G98 notification to your regional Distribution Network Operator, and this is the part we were most worried about ahead of launch — six DNOs, six slightly different online forms, and a five-day statutory window to raise an objection. Early indications from the first week are that most notifications are going through without a hitch, though a few installers and early adopters have reported DNO portals timing out under higher-than-usual traffic on launch weekend itself. If you haven't done this step yet, our G98 notification walkthrough covers exactly what to submit and when. Nobody has reported a DNO actually objecting to a compliant single-unit installation so far, which is reassuring given how much uncertainty there was in the run-up to legalisation.

The teething problems so far

Nothing dramatic, but a few patterns are emerging in the first week:

• Confusion over the no-extension-lead rule. A meaningful number of buyers are still trying to route panels further from the house than the factory lead allows, not realising this invalidates the compliant setup entirely. It's the single most common mistake we're seeing reported.
• Returns due to buyer's remorse on siting. A few retailers have quietly confirmed a higher-than-average early return rate, mostly from people who bought before checking whether their nearest socket actually reaches a usable panel position. If you're still deciding on a kit, our buying checklist covers this before-you-buy step in detail, and if you do need to return a faulty unit, your consumer rights are unaffected by any of this being a new product category.
• Insurance calls. Several insurers have reported a spike in customers ringing to check whether a plug-in kit affects buildings or contents cover. Most mainstream insurers have confirmed compliant installations don't need a policy change, but it's worth doing this call yourself rather than assuming — see our plug-in solar and home insurance guide.

What to expect next

The £25m government pilot for low-income households (covered in our pilot scheme explainer) is expected to open applications later in the autumn, and DESZ has indicated it will publish uptake figures from the first month once the data is in — likely in early October. We'll update this piece and follow up with a proper one-month retrospective once there's a fuller data set to look at, including actual generation figures now that kits have had a few weeks in the ground rather than just theoretical specs.

If you're in your first week with a newly installed kit, our day-by-day first week setup guide is worth reading alongside this piece — it covers the practical side of getting monitoring set up and starting to shift your usage patterns.

Has anyone actually had a plug-in solar kit rejected by their DNO?

Not that's been publicly reported in the first week. The five-day objection window has passed for launch-weekend installs without any confirmed DNO objections to a correctly notified, single-unit, compliant installation. This may change as volumes increase, but there's no evidence so far that DNOs are pushing back on properly submitted G98 notifications.

Is it too early to know if plug-in solar is worth it?

Five days isn't enough time to judge real-world generation or savings — you need at least a full season of data for that, and ideally a full year given how much UK output varies between summer and winter. What the first week does tell you is whether the buying and installation process is smooth, which so far it broadly has been, aside from the DNO portal slowdown on launch weekend.

Should I wait before buying, given the early returns and stock issues?

Not necessarily. The return rate being reported is mostly down to buyers not checking socket-to-panel distance before ordering, which is avoidable by reading a proper buying guide first rather than a sign that the kits themselves are faulty. If a specific retailer or model is out of stock, it's more a supply-chain teething issue than a reason to delay the whole purchase.