Plug-in solar kits now legal and on sale in UK

Plug-in solar kits have become legal in the UK, allowing households to generate their own electricity without the need for roof panels. The rule change, which took effect today, means retailers can sell the devices to homes across Great Britain, though Northern Ireland is excluded.

The kits, known as balcony power plants in Germany, consist of solar panels that can be mounted on a balcony, in a garden, or against a wall. They plug directly into a standard three-pin socket, reversing the electrical current so that the generated power can be used to run appliances such as fridges, TVs, and Wi-Fi routers. The energy is not stored, so it must be used while the sun is shining, which means daytime consumption is key.

Typical entry-level systems cost between £400 and £600, with potential annual savings of £70 to £110. That suggests a payback period of four to six years, depending on usage and energy prices. The government says a typical household could save up to around £100 a year, and ministers hope the devices will help people cut bills before expected energy price rises later this year.

The change is particularly significant for people living in flats or rented accommodation, who have previously been unable to install traditional roof panels. In areas with high numbers of rental properties, such as Salford, residents have welcomed the move. One flat dweller said it would be "really important" because of unfair pricing and bill problems.

However, safety experts have issued warnings. Electrical Safety First, a charity, says not every home is suitable, and older properties may lack the correct components for a two-way electrical flow. There are also risks if people use extension leads or coiled cable reels, which can overheat. The charity advises getting an electrician to check the home before installation, especially in older houses.

Buyers are also urged to purchase from reputable retailers rather than third-party sellers on online marketplaces, as those sellers are not legally responsible for safety compliance. Tenants should seek permission from their landlords, and there may be planning rules to consider. Installing multiple systems could put additional strain on wiring and protective devices.

The devices have been available in several EU countries for some time, where they are a familiar sight on balconies. The UK's move brings it in line with that trend, offering a low-cost entry point to solar power for millions of households that previously had no option.