Octopus Energy supplies gas and electricity to homes and businesses across the UK, and also offers heat pumps, solar panels with batteries, and electric vehicle chargers. They are the UK's most awarded energy supplier and have a 4.8-star customer service rating based on nearly 840,000 reviews. As a direct seller, they keep prices fair and transparent, and they invest heavily in green energy. They would be a natural referral for anyone looking to switch to a cheaper, greener energy supplier or to install renewable technology at home or in their business.