Best Plug-in Solar Kits UK: Where to Buy and What to Check
Published 31 August 2026. Prices as seen on that date.
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The socket route opened on 27 August 2026 and the market arrived almost immediately. Four days in, there are kits on sale from a national high-street retailer, from two of the big portable-power brands, and from specialists who have been selling grid-tied DIY kits in this country for years.
This page covers who is actually selling, what to check before you spend anything, and how to tell whether a given kit is worth it on your particular balcony, which is a different question from which kit is best.
Check these five things before you buy anything
Every one of these is a condition of the socket route. A kit that fails any of them is not a bargain, it is an electrician's job wearing a box.
- Inverter rated 800 VA or less. Check the inverter, not the panels. Panel wattage above 800 W is normal and fine.
- Sold as a complete solar-only product. The certification applies to the kit as a unit. Parts bought separately do not inherit it, and a battery in the box takes it outside the route.
- An approved plug, and a cable long enough to reach a real socket. Extension leads, cable reels and multi-way adaptors are banned outright.
- G98 evidence the retailer will actually give you. The route depends on verified G98 evidence on ENA Connect Direct. Ask before you order, not after.
- Mounting hardware that suits your rail, wall or floor — and remember that fixing brackets to a wall or balcony needs written consent from the freeholder or landlord.
The full position, including the timber balcony and cladding exclusions, is in the plug-in solar rules guide.
Where you can buy one now
Argos
The first UK high-street retailer to list plug-in panels online, with five models that meet the full requirements, priced from £599. The appeal is the obvious one: a returns counter, a familiar warranty process, and no question about whether the seller will still exist next year.
EcoFlow STREAM
EcoFlow's balcony system starts at £399, with a 2 × 400 W rigid panel and STREAM microinverter package at £499 and a 2 × 450 W option above it. EcoFlow came to this from portable power rather than from solar installation, which shows in the setup experience and in the app.
Anker SOLIX
Anker has published its own UK compliance guidance alongside its kits, which is a reasonable signal that the paperwork side has been thought about rather than bolted on. Same broad proposition as EcoFlow: consumer electronics polish, app monitoring, a brand with a returns process.
The specialists
pluginsolar.co.uk has sold self-install grid-tied kits in Britain for years, from around £499.99 including VAT, and Thunder Energy lists its Thunder Bolt 400 W at £549.99 all in. Hampshire Generators carries plug and play kits too. These sellers generally know more about the electrical side than the consumer-electronics brands do, which matters most if your situation is unusual.
Mounting hardware and extras
Balcony rail brackets, tilt frames, ballast feet for a flat roof and outdoor-rated cable are usually bought separately, and this is where a kit's real cost creeps up. A tilt frame is the single best upgrade available: on the numbers below it is worth more than buying a bigger kit.
Mounting brackets and tilt frames on Amazon
The thing that decides the answer, and it is not the kit
There is no export payment on a plug-in system. Whatever the panels make while the house is empty goes into the grid and nobody pays you for it. So the return depends far more on your day than on your kit.
Take one 880 W kit on an 800 VA inverter, unshaded, at 25.7p per kWh, at £499. Hung vertically on a south-facing balcony rail in the Midlands it generates about 634 kWh a year:
- Someone home a good part of the day, using 60%: £98 a year, paying back in 4.9 years
- House empty every weekday, using 25%: £41 a year, paying back in 10.8 years
- Same kit, same occupancy, moved to a tilted south-facing frame in the garden: 880 kWh and £136 a year
One kit, three answers, and the difference between the best and the worst is bigger than the difference between any two kits on sale. Put your own numbers through the plug-in solar savings calculator before you choose a size, because it will probably tell you to spend the money on a tilt frame and a timer switch rather than on more panel.
Getting more out of whatever you buy
- Move consumption into the middle of the day. Dishwasher, washing machine and immersion on a timer is free and it directly converts spilled units into saved money.
- Tilt it if you possibly can. Roughly 40% more output than the same panel hung vertically.
- Mind the shade. A neighbouring building across the middle of the day costs a quarter of the annual yield.
- Oversize the panels against the inverter. 880 W or 1,000 W behind an 800 VA microinverter costs a sliver of the summer peak and gains on every dull morning.
Frequently Asked Questions
Where can I buy plug-in solar panels in the UK?
Argos was the first high-street retailer to list them online, with five compliant models from £599. EcoFlow sells its STREAM balcony system direct from £399, Anker SOLIX sells its own range, and specialists including pluginsolar.co.uk, Thunder Energy and Hampshire Generators have been supplying self-install grid-tied kits in Britain for longer than the socket route has existed. Whichever you choose, confirm the inverter is 800 VA or under and that the seller will provide G98 evidence.
How much does a plug-in solar kit cost in the UK?
Roughly £399 to £700 for the kit as of late August 2026, with EcoFlow starting at £399, specialists around £500 to £550, and the Argos range from £599. Budget separately for mounting hardware, which is usually not included and which is where the total quietly grows. A tilt frame is the one extra that reliably pays for itself.
Which is better, EcoFlow or Anker?
On the electricity they produce, very little separates them: both pair around 800 W of panel with an 800 VA microinverter, and output is set by orientation, shading and latitude rather than by the badge. Choose on the things that do differ, which are the app, the warranty terms, the mounting hardware included and whether the seller hands you the G98 paperwork without being chased. Then spend the saved deliberation on where you mount it, because that is worth more than either choice.
Is a bigger kit better?
Not once you are at the 800 VA ceiling, because the inverter caps what reaches the house and the surplus earns nothing. Beyond about 1.5 times the inverter rating in panel, extra panel stops paying for itself. If a kit is already spilling half its output, another panel spills more; a tilt frame, or moving the washing to the middle of the day, converts what you already make into money instead.
Can I add a battery to a plug-in solar kit?
Not inside the socket route, which covers a complete solar-only product. A battery would let you keep the surplus that currently goes to the grid for nothing, which is exactly the weakness of a plug-in system, but adding one means the conventional route: a G98 or G99 connection with an electrician making the final connection. Worth pricing properly rather than assuming, because the battery usually costs more than the kit.
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