The UK has legalized plug-in solar (but don't rush to buy a kit)

Experts say it's worth getting your home's electrical systems checked first.

In March, the UK announced it would end its longstanding ban on the sale and use of plug-in solar panels. And today, August 27 , is the date that the various laws and regulations have changed, making it legal to buy and install a small solar setup yourself. The move has been in the works for a while as part of a raft of initiatives to reduce the nation's dependence on fossil fuels. It's a big move, and one that could help countless households reduce the cost of their power bills. Here's what you need to understand and, crucially, a note not to rush into this too soon for plenty of sensible reasons.

Unlike professionally installed systems, plug-in solar gear can be plugged into a standard wall socket. Rather than generating vast amounts of power, the idea is to use one or two panels, connected to your home via microinverter, for a trickle of extra juice. You won't be able to live off-grid with them, but might be able to cut some of the costs of your power bill. The modest cost of the hardware and the fact you don't need to pay a professional to install it should encourage adoption. Given how expensive energy is in the UK, even a small cost saving should be meaningful over time. And it may be the first chance many of the 5.4 million people living in apartments in the UK get to embrace the solar revolution.

Plug-in solar is widely used in other European nations, but the most obvious example is Germany. Around half the German population rent their homes, a barrier to the widespread adoption of solar power. In 2019, Germany implemented Balkonkraftwerk (literally "balcony power plant") to allow renters to hang plug-in panels from their balconies. It added legal protections to this right in 2024 , preventing landlords from objecting to their use. According to Germany's plug-in solar association , more than 1.2 million people have already installed systems.

A legally-compliant plug-in solar system comes in two parts: solar panels and a microinverter. The former is like any other solar panel, but they'll be easier to install on balconies and other DIY-able areas. The latter, if you're unaware, is a unit converting DC electricity to AC, making it suitable to be connected to your home's electrical system.

The UK is aping Germany's example, limiting the size of these plug-in solar systems to avoid overwhelming its power grid. Inverter output is capped at 800 watts, which is the maximum amount of power that can be pushed into a home's electrical system. Depending on if you get one or two panels, there will be a higher upper limit on generation, but 800W is all you'll be able to use at one time. And it's worth knowing that even if a panel promises to generate 450W, you may not actually get that much depending on a number of factors.

When the Labour government won the 2024 election, it promised to supercharge domestic clean energy production. With the rationale of creating "energy independence from dictators like Putin," it committed to tripling solar generation by 2030. In June 2025, it outlined its solar roadmap, where it pledged to "explore [the] potential" of plug-in solar installations. One month later, it commissioned a safety study to look into the feasibility of widespread use. Then, on March 24, 2026, the government said it would make plug-in solar available to buy "within months." The government said it would work with regulators and infrastructure providers to update the relevant rules.

The UK's rules around solar power are so strict that only professionally installed systems are legal. But successive administrations have held back on even looking at changing the rules for plug-in systems. When asked by Engadget earlier this year, a government spokesperson refused to answer the question directly but it appears the concern was around safety. A report from electrical industry website efixx suggests it's the way the UK's system was set up that there were more risks than for European plugs.