Octopus Energy has launched 'Zero Bills' mortgages which helps customers move into properties which have heat pumps and solar PV, with no energy bills for at least ten years. The energy company has partnered with the UK’s first covered bond bank, Perenna, to offer these mortgages which breaks down the cost barriers of purchasing a green home.The ‘Zero Bills’ initiative has been integrated into Perenna’s affordability calculations, resulting in a…