Plug in solar panels are now available to buy off-the-shelf from UK retailers. They are a cheaper option than rooftop solar panels, but it is important to follow the best safety advice before buying and installing a plug-in system. The Energy Saving Trust recommends people should get a qualified electrician to check their home’s electrical system, check that they have permission to install them outside their home and ensure they buy a UK-compliant product directly from a reputable retailer.