Press Release

Green Mountain and KMW break ground on new sustainable data centre campus in Germany

Thu 2 Nov 2023

Image of Green Mountain and KMW ground breaking

Norwegian data centre company, Green Mountain, and German power company, KMW, have started construction for their new sustainable data center in Mainz, outside Frankfurt.

The first 18MW building of the site, with 54MW total potential capacity, is set to be completed in Q1 2025.

Earlier this year, Green Mountain and KMW announced they had partnered in a joint venture to build a new sustainable data centre campus in Mainz, 30km outside Frankfurt.

The ground work at the site started in September, but today they officially marked the construction start.

Representatives of both local and regional Government were present to perform a foundation stone ceremony at the site. This included Rhineland-Palatinate Minister for Climate Protection, Environment, Energy and Mobility, Katrin Eder; the Lord Mayor of Mainz, Nino Haase; and the Lord Mayor of Wiesbaden, Gert-Uwe Mende were all present at the event.

Together with the management team of the joint venture, they placed relevant objects in a time capsule that was ceremonially placed in the foundation of the first building.

Climate Protection Minister, Katrin Eder, said: “The green data centre from KMW and Green Mountain is a lighthouse project for Rhineland-Palatinate that not only underlines the regional importance, but also paves the way for sustainable digitalisation and economic development.

“It shows that we can also achieve our environmental goals through partnership-based collaboration and technical innovations.”

The site will be powered by 100% renewable energy, with gas turbine generators providing the backup power. The data centre will be cooled by the river Rhine.

CEO of KMW, Oliver Malerius, said: “This data centre is a symbol of technical excellence and sustainability. It shows how innovation and environmental protection can go hand in hand, and it fills us with pride, to help shape a green digital future.”

The data centre has a PUE below 1.3, with backup power provided by KMW’s gas plant, making diesel generators for emergency power redundant.

Up to 60MW of waste heat will be fed into the Mainz district heating system, supplying 20,000 households, the nearby dome and stadium with renewable district heating.

“This is truly a proud day in our company’s history. I am confident that this project will set a new green standard when it comes to data centres in Germany,” said Svein Atle Hagaseth, CEO of Green Mountain.

The site can support both multi-tenant contracts, as well as dedicated buildings for larger client installations.

Three data centre buildings are planned at the new 25,000sqm site situated in an already existing industrial area adjacent to KMW’s power plants.

Construction has already started and the first building will be completed in Q1 2025.

Hungry for more tech news?

Sign up for your weekly tech briefings!

Send us a correction Send us a news tip