Launched at the beginning of Lent by charities Christian Aid and Tearfund, The Big Church Switch asked churches to change their energy supplier to one using renewables instead of finite resources.
It means more than a million pounds in bills will be paid to clean power companies.
During Easter Week, the organisation will negotiate to find the best deal for the 424 churches.
One of the churches to sign up is the oldest Methodist building in the world, The New Room in Bristol.
David Worthington, Manager of The New Room said: "We may be the oldest Methodist building in the world but that doesn't mean we have to use the polluting energy of the past.
"We take seriously the impact we have on our neighbours, both locally and globally. Switching our energy provider to clean sources of power is a simple thing we can do to help the global transition to a low carbon world. If we, in a building as old as ours, can embrace the idea of renewable energy then anyone can."
The Bishop of Manchester, Rt Revd David Walker, said: "Creation is a gift from God and Christians have a divine commission to take care of it. Like any receiver of a precious gift, to honour the giver we must treasure the gift.
"As individuals and churches we have a choice in how we treat the earth, how we spend our money, how we power our homes and our buildings.
"By creating technology which can turn wind and sunshine into clean and renewable energy humans continue to benefit from the gift of creation.
"Making the most of this bountiful harvest is a common sense way for us to roll back the ravages of climate change and ensure we are taking an active role in being part of the solution.
"The Big Church Switch is a practical way for us all to do our bit."
Ben Niblett, Tearfund Senior Campaigner said: "We're so encouraged by this growing movement - Christians around the UK have taken action and had a big impact on our carbon footprint by taking part in The Big Church Switch.
"We're loving our neighbours with our electricity bills. We will continue to hold governments to account and to help people across the world hit by the devastating daily impacts of climate change."