Jon Kirby, head of solar and storage at E.On UK, said: "With a growing desire to adopt self-generation systems like solar and battery storage, we're proud to offer innovative new deals like our 'Black Friday' offer, to help drive further take-up of technologies that can have a significant and positive impact on our home energy. "We know how important renewable technologies are in the battle against climate change, which is why we're leading the way and helping customers take part." The offer comes during a transition period for domestic solar, with the Smart Export Guarantee (SEG) set to come into effect on 1 January 2020. In March, E.On launched a Solar Reward scheme for the first 500 customers to install solar through its programme, designed to "bridge the gap" between the feed-in tariff and the SEG.