Ikea stores in the UK are to beginning selling solar panel packages.All 17 outlets in Britain are to get into the green energy market within the next 10 months.The world’s largest furniture retailer ran a pilot project at its Lakeside store, east of London, and found that one photovoltaic system sold nearly every day.The panels harness the power of sunlight and convert into electricity.Britain's solar market is still small and behind green energy leaders such as Germany and Spain, but there has been regular growth, with year-on-year installations rising 25% in September to 1.7 gigawatts.Government subsidies were put in place to boost greener energy production and help meet agreed targets to cut carbon emissions. Houses with solar panels are eligible for subsidies and can sell excess electricity to the national grid.An average semi-detached house with a south-facing roof would earn as much as £770 a year through subsidies and savings on energy bills, an Ikea case study showed.Ikea is to sell panels made in China for a minimum spend of £5,700. Customers get 18 panels, which should break even within roughly seven years. The package includes in-store consultation, installation and maintenance.