The deal will see the Dublin cathedral use renewable energy sourced from Moneenatieve Wind Farm in Co Leitrim.
The CPPA forms part of Pinergy's Guarantee of Origin offering, which allows companies to purchase electricity generated from wind or solar farms based in Ireland that is feeding into the national grid.
Christ Church Cathedral is the first Cathedral in Ireland to sign a CPPA, which will meet 100% of its annual energy requirements and support its sustainability ambitions to reduce its carbon emissions.
Colm Foley, Pinergy Commercial Energy Manager, said the agreement demonstrates the Cathedral’s commitment to sustainability and shows that they are pioneers in this space.
"Ireland has lots of beautiful historic buildings and we believe it's crucial to help these historically significant buildings transition to renewable energy, so they don't get left behind in the energy transition," he added.
Cathedral CEO Susanne Reid said that Pinergy's offering provided an excellent opportunity for Christ Church Cathedral and other historically unique buildings to improve its sustainability credentials while preserving the authenticity of the historic building.