The UK government confirmed on 16 March 2026 that plug-in solar will be legal. The product standard from BSI is expected in July 2026. Once that lands, retailers will be able to sell certified kits. This guide covers what to look for when that moment arrives, and what you can research right now. If you are new to the topic, start with our full UK plug-in solar guide.
Can You Buy Plug-in Solar Now?
You can buy panels and a microinverter today. You cannot legally connect them to your home circuit yet. The wiring regulations that permit plug-in solar connections come into force with BS 7671 Amendment 4 on 15 April 2026. The BSI product standard that defines what a compliant kit looks like is expected in July 2026. The full transition period ends October 2026.
Buying hardware now carries a small risk: if the UK product standard sets different voltage limits or socket requirements to Germany, your kit may need an adaptor or replacement component. Most observers expect the UK to closely follow Germany’s DIN VDE V 0126-95 standard, so the risk is low. For the full timeline see our plug-in solar UK guide.
Aldi and Lidl Plug-in Solar Panels: Can You Buy Them Now?
Not yet.
Retailers cannot sell certified plug-in solar kits until the BSI product standard is published and the transition period begins. Once it does, supermarkets are expected to move quickly.
In Germany, Lidl began selling plug-in solar kits in 2023 within months of legalisation. Aldi Germany has run similar promotions. A typical kit costs EUR 199–299 (roughly GBP 170–250 at current rates) and includes two panels, a microinverter, the DC cables, and a plug. Some kits include a wall or railing mount. Some do not.
The UK government’s own announcement mentioned plug-in solar being available “in supermarkets within months.” B&Q, Screwfix, and online retailers are likely to stock kits alongside the supermarkets. Amazon UK already lists hardware from German suppliers. For context on where the rules sit today, see what was actually announced.
When kits do appear on shelves, here is what to check before buying.
Check 1: The Microinverter Certification
The microinverter converts DC from your panels into 230V AC for your home. It needs to meet UK grid connection requirements. The relevant standards are G98 (for systems up to 16A per phase, which covers all plug-in solar) and G100 (export limitation, relevant if your system feeds back to the grid). For a plain-English breakdown, see our microinverter section in the hub.
The ENA Type Test Register lists inverters with confirmed G98 compliance. The EcoFlow Stream (EFWN511) already has a G98 full type test approval, published October 2023. Hoymiles products are widely used in Germany but their UK G98 status should be confirmed before purchase. We cover this step-by-step in how to choose a plug-in solar microinverter.
A compliant microinverter must disconnect from the grid within 0.1 seconds of detecting grid loss or being unplugged, and capacitors must discharge to below 34V within one second. This is a safety requirement, not a performance one. Any kit sold through a UK retailer after the BSI standard is published should meet this by default.
Check 2: Panel Voc vs Inverter Maximum Input Voltage
Every panel has a rated open circuit voltage (Voc) on its datasheet. Every microinverter has a maximum input voltage it can safely accept. The rule is simple: the panel Voc must not exceed the inverter’s maximum input voltage. If you connect panels in series, their Voc values add up. Exceed the inverter’s maximum and you risk damaging it.
Standard 450W panels have a Voc of around 37–42V. The Hoymiles HMS-800W-2T has a maximum input voltage of 65V per channel. A single 450W panel at 41V Voc connects safely with plenty of headroom. Two panels in series would give a combined Voc of 82V, exceeding the 65V maximum. Wire them in parallel, or use a 4-input inverter with one panel per input, and you stay within spec.
Supermarket kits will be designed to connect correctly out of the box. If you are buying components separately, check the panel datasheet and inverter spec sheet and confirm they are compatible before ordering.
Check 3: What the Kit Actually Includes
German kit listings vary on what they include. Some include a railing or balcony mount. Many do not. The DC cables between panels and inverter are usually included but the length may not suit your installation. Here is what to confirm before buying:
- Mounting hardware — does it include a bracket, clamps, or railing mount? If not, budget separately. Railing clamps for balcony solar cost roughly GBP 20–40.
- DC cable length — the cable between panels and microinverter needs to reach your installation point. Standard kits include 1–2 metre leads. If your panels are further from the inverter, you may need extension cables.
- AC plug type — in Germany, the standard Schuko plug is used. The UK uses BS 1363 (standard 3-pin). Once the UK product standard is confirmed, compliant kits sold here will use the correct plug. If importing from Germany, check the plug type.
- Monitoring app — most modern microinverters include Wi-Fi monitoring. Confirm the app works in the UK and does not require a hub device sold separately.
How Many Panels Come in a Kit?
The standard German kit is two panels and one 800W microinverter. Two 430–450W panels give you 860–900Wp of DC input, which is the standard overpanelled configuration for an 800W inverter. Germany allows up to 2,000Wp of panel input on a single system, so four panels on a 4-input inverter is also a common setup.
The UK limit has not been confirmed yet. We expect it to follow Germany. For more on panel count and the Voc constraint, see the how many panels section of our main guide.
What About Kits With a Battery?
Some kits include an AC-coupled battery, such as the Zendure SolarFlow or EcoFlow PowerStream with battery add-on. These store your solar generation during the day and discharge when you need it, which significantly increases how much of your own solar you actually use. In Germany, battery kits typically cost EUR 479–679 (GBP 400–570).
A battery roughly doubles the annual return from a plug-in solar system. Without one, any generation that happens while you are out of the house is either exported to the grid at a low rate or simply wasted. With one, every watt your panels produce gets stored and used when you actually need it. For the full case for adding a battery, see our battery storage section.
What to Do Right Now
The BSI product standard is expected in July 2026. Until then, here is a practical checklist based on real-world installer and owner experience:
- Read the full plug-in solar UK guide to understand the regulatory timeline before spending anything.
- If you want a good deal, you can buy hardware now and hedge regulation risk by choosing a microinverter that is already listed on the ENA Type Test Register for G98.
- Be prepared for a fallback route: if final UK plug-in limits differ from your kit, you may need an electrician to hardwire it. That adds cost, but it can also unlock a path up to 3.68kW under standard G98 fit-and-notify rules.
- BS 7671 Amendment 4 does not replace G98, but it supports simpler small-generation integration. Today, G98 is already notification rather than prior application for sub-3.68kW systems (fit first, notify within 28 days). See the DNO and G98 section.
- Decide where you would mount panels. South, east, or west-facing surfaces all work. Assess whether you need a railing mount, wall brackets, or ground stakes. Our mounting guide helps here.
- If timing matters, consider buying before expected China export-rebate changes filter through UK pricing. See our live UK solar panel prices tracker.
- Once the BSI standard is published, cross-reference any kit you buy against the confirmed UK requirements before purchasing.
