EDF Renewables UK has signed a 15-year power purchase agreement with Transport for London to supply solar electricity from its Longfield project in Essex.
The deal will see around 20% of the site’s output dedicated to TfL and marks a key step in the solar farm’s development.
Longfield received planning approval in June 2023 and is now progressing toward construction.
TfL expects to save more than 28,000 tonnes of carbon over the contract period.
“This agreement enables EDF Renewables UK to invest in a brand new facility for clean electricity supply for our Tube network and GB’s grid,” said Lilli Matson, chief safety, health and environment officer at TfL.
“It is a significant step in our mission to make all our services powered this way by 2030.”
Mayor of London Sadiq Khan said the agreement would help make London “a net zero carbon city by 2030” and ensure public transport remains the greenest choice.
EDF Renewables UK chief executive Matthieu Hue said: “This agreement is built upon our shared commitment to sustainability and investing in clean energy.”
TfL uses around 1.6TWh of electricity annually and is one of the UK’s largest consumers.
Energy minister Michael Shanks said the move supports energy security and creates new green jobs.