Preliminary work began this week and construction of the panels themselves begins in October, which is set to last three weeks.
Ninety per cent of the funding for the solar panels has been raised through a fundraising project launched last year.
They're expected to cut the Cathedral's energy bills by twenty five per cent each year, equivalent to making around 2,000 cups of tea. It will also allow the Cathedral to install under floor heating in its Lady Chapel.
Scaffolding rises @GlosCathedral. Project Pilgrim - Lighting the way for years to come with solar panel installation pic.twitter.com/AVy7ESU0yB
— Gloucester Cathedral (@GlosCathedral) 5 September 2016
Because of the ceiling's height and the parapet surrounding it, the solar panels will only be visible from a select few points in Gloucestershire.
It's part of the Cathedral's Project Pilgrim, a ten-year restoration project funded by the Heritage Lottery Fund, trusts and individuals.
Speaking on Premier's News Hour, Anne Cranston the project manager for Gloucester Cathedral said: "We're very, very conscious of our responsibilities to the environment.
"We're going to have to become a little more light-touch and think about our carbon footprint going forward, and this allows us to play our part in delivering that."
Listen to Premier's Hannah Tooley speaking to Anne Cranston on the News Hour.
