Plug-in solar panels – where can I buy them and how much money could they save?

PLUG-IN solar panels have officially landed on UK high streets, offering householders a quick, DIY way to slash their electricity bills. Until now, tapping into solar power required spending between £5,000 and £8,000 on heavy rooftop setups installed by professionals. Unlike traditional rooftop systems, plug-in solar kits are built for simplicity Credit: Getty When the sun is shining, your home automatically uses this free solar power first Credit: Getty But fresh changes to UK wiring regulations mean Brits can now buy mini solar kits straight off the shop shelf, plug them into a standard outdoor socket, and start generating their own green power straight away. Already hugely popular across Europe – especially in Germany, where millions hang them on balconies and fences – the compact kits are designed for gardens, patios, and outdoor walls. Sign up for the Money newsletter Thank you! Here is everything you need to know about where to get them, how much they cost, and how much money they could knock off your annual bills. How do plug-in solar panels work? Unlike traditional rooftop systems, plug-in solar kits are built for simplicity. Each kit comes with one or two lightweight solar panels, a long cable, and a standard three-pin plug. You simply mount the panel outside where it catches the sun, plug it directly into an exterior wall socket, and the electricity flows into your home network. When the sun is shining, your home automatically uses this free solar power first, reducing the amount of electricity you draw from the National Grid. The entire setup takes under an hour, requires zero electrical installation work, and can easily be packed up and moved if you change address. Most read in Money Where can you buy plug-in solar kits? A wave of major retailers have rolled out the technology following the legal green light. Octopus Energy has become the first major supplier to launch its own plug-in kits. Priced from £450, Octopus offers setups featuring 460W panels that capture sunlight from both sides. Customers can track their live power generation directly through the Octopus app. High street staples and online retail giants are quickly following suit. Argos has already launched sales online and in-store, while Amazon is expected to roll out its listings in the coming weeks. Other major retailers including B&Q, Screwfix, Wickes, Currys, and Lidl have all committed to stocking the kits. How much money could you save? Most plug-in solar kits cost between £400 and £600, depending on the brand and setup. According to government figures from the Department for Energy Security and Net Zero (DESNZ), a standard 800W kit can generate up to 20% of an average home’s electricity needs during sunny periods. Energy ministers estimate households will save up to £110 a year on their electricity bills, while Octopus projects savings of up to £150 annually depending on your home’s sunlight exposure and energy habits. That means the initial cost of the kit could be fully paid off in bill savings within roughly four years. What are the rules for renters and leaseholders? Because plug-in panels don’t require permanent roof work, they are a game-changer for renters, leaseholders, and flat owners who previously couldn’t access solar power. But ministers say that tenants should still seek permission from landlords, freeholders, or local councils before fixing panels to balconies or external walls. The Government has written to landlord associations encouraging them to look favourably on tenant requests. Buyers will also need to register their device online after purchase so grid operators can monitor local energy generation. What is the main safety rule? Independent safety testing has confirmed compliant plug-in panels are fully safe for UK home wiring. But experts have warned that you should never plug a solar panel kit into an extension lead. Extension cords can overheat under continuous power loads, creating a severe fire hazard. Kits must always be plugged directly into a dedicated outdoor wall socket. Comment now