Plug-in solar panels are now legal to buy and use across Great Britain, allowing households to generate electricity without conventional installation costs and potentially save up to £110 a year. Each kit can produce up to 800 watts, enough to supply roughly 20% of an average home’s electricity use. The latest Reuters report dated the change to Aug. 26, while the existing record gave Aug. 27. The rollout comes after Ofgem raised its domestic energy price cap by 4% from October as the war in Iran pushed up wholesale energy costs. Amazon, Currys, Argos and Wickes have committed to stocking the panels, which have sold elsewhere in Europe for about £400 to £600. Buyers, particularly renters and residents of shared properties, may need permission from landlords, building owners or freeholders, as well as planning permission or listed building consent. The government has described plug-in solar as a way to widen access to renewable power for renters, flat-owners and households without suitable roofs, while stressing safety, registration and installation guidance.