As David prepared for retirement, he wanted to invest part of his pension lump sum into his home to reduce long-term energy costs and make a more environmentally responsible choice. Living in a three-bedroom end-terrace house in Didcot built in the 1980s, David’s 15-year-old gas boiler was nearing the end of its life, making it the right time to consider a future-proof solution.

Josh and Lucy’s 15-year-old gas boiler was reaching the end of its life. Instead of simply replacing it, they invested in a forward-thinking renewable energy system: a battery-buffered heat pump plus a 4.5 kWp solar array paired with intelligent storage and smart grid integration. This setup slashed energy bills by 75%, dramatically reducing 20-year costs from £49,600 to £16,500—delivering over £33,000 in savings and a 50 % lifetime ROI.