Top 10: Data Centres Using 100% Renewable Energy
Data centres power the modern digital economy, yet their surging energy needs have placed sustainability firmly in the limelight. Global operators are scaling capacity at speed while working to curb carbon footprints.
Increasingly, hyperscale and colocation sites show that growth and green goals can co-exist, operating entirely on renewable energy sources such as wind, solar and hydropower.
This week’s Top 10 ranking spotlights the largest data centres worldwide running 100% on renewables, measured by a blend of their output, innovation and impact in driving a cleaner digital future.
10. Telehouse South (KDDI)
Location: London, United Kingdom
Built: 2022 (expanded 2024)
CEO: Kenkichi Honda (MD of Telehouse Europe)
Telehouse South, a redevelopment in London’s Docklands, will deliver an IT capacity of 18 MW, driven by wind, solar, biomass and hydro power.
As a KDDI subsidiary, Telehouse runs all London sites exclusively on 100% certified renewable energy.
Its cooling system utilises higher water temperatures and the UK’s ambient air to maintain year-round efficiency, with future plans to channel recovered waste heat to surrounding buildings – proving sustainability is possible in a dense urban hub.
9. Iron Mountain London (LON-2)
Location: London, United Kingdom
Built: 2021
CEO: William Meaney
Iron Mountain’s 27 MW London data centre campus in Slough operates entirely on renewable energy and upholds rigorous BREEAM sustainability standards.
Since 2017, the company’s entire global portfolio—including this multi-tenant hyperscale site—has run on 100% renewable power.
With its pioneering Green Power Pass, tenants can verify truly carbon-neutral operations, while hourly carbon tracking continues to set industry benchmarks.
8. EcoDataCenter 1
Location: Falun, Sweden
Built: 2019
CEO: Peter Michelson
EcoDataCenter 1 is a high-density hyperscale facility delivering 90 MW of total capacity, powered entirely by renewable energy – 75% sourced from local hydropower and 25% from regional wind generation.
Built on an innovative architectural framework, the site achieves an impressive PUE of 1.2 while maximising heat recapture and regional energy integration.
As one of Europe’s most sustainable data hubs, EcoDataCenter 1 is a benchmark for decarbonised operations and cutting-edge digital infrastructure design.
7. Viborg Data Centre – Apple
Location: Viborg, Denmark
Built: 2019
CEO: Tim Cook
Apple’s Viborg Data Centre stands as a leading example of Europe’s sustainable hyperscale innovation, powered entirely by wind and solar energy through long-term agreements and on‑site generation.
The facility is deepening its integration with local infrastructure by channelling surplus heat into the city’s district heating network, further cutting its environmental footprint.
From day one, Apple has run all operations here on certified renewable energy, with Viborg playing a pivotal role in its mission to achieve global carbon neutrality by 2030.
6. Moro Hub Data Centre (DEWA)
Location: Dubai, UAE
Built: 2023
CEO: Mohammad Bin Sulaiman
Dubai is home to the world’s largest solar-powered data centre, delivering more than 100 MW of capacity within the vast Mohammed bin Rashid Al Maktoum Solar Park.
Operated by Digital DEWA’s Moro Hub, the Uptime TIER III-certified site drives regional digital transformation while relying entirely on solar energy.
By cutting more than 10,000 tonnes of CO₂ emissions each year, the facility advances Dubai’s Net Zero by 2050 vision.
5. Scala’s Tamboré Campus
Location: São Paulo, Brazil
Built: Phase 2 operational 2024
CEO: Marcos Peigo
Scala Data Centers’ Tamboré Campus ranks among Latin America’s largest, with a projected 600 MW capacity upon completion.
Fully powered by wind and hydropower through Brazil’s renewable grid and strategic long-term PPAs, it exemplifies advanced clean-energy integration.
Across its operations, Scala prioritises world-class efficiency, minimal water consumption and a strong ESG performance framework.
4. Switch SuperNAP (Las Vegas)
Location: Las Vegas, USA
Built: 2008
CEO: Rob Roy
With 315 MW of capacity (expandable to 495 MW), Switch SuperNAP operates entirely on renewable power sourced from large-scale solar partnerships.
This Tier 5 campus supports mission-critical enterprise and government workloads, surpassing global benchmarks for resiliency and sustainable energy.
Switch’s continued growth drives zero-carbon IT infrastructure at hyperscale scale.
3. Eagle Mountain Data Centre – Meta
Location: Eagle Mountain, Utah, US
Built: 2018–2023
CEO: Mark Zuckerberg
The Eagle Mountain Data Centre, run by Meta, ranks among the largest single-site facilities globally, spanning more than 900,000 square feet and delivering scalable IT capacity in the multi-hundred-MW range.
Its operations are fully powered by renewable energy, supported by dedicated solar developments both on- and off-site, including over 800 MW installed across Utah.
From open-air cooling systems that dramatically cut water use to combining utility green tariffs with direct Power Purchase Agreements, the site achieves sustainability at exceptional scale.
2. Switch Citadel Campus
Location: Tahoe Reno, Nevada, USA
Built: 2017
CEO: Rob Roy
Covering more than 7.2 million square feet and delivering up to 650 MW, the Switch Citadel Campus ranks among the world’s largest and most sustainable.
Driven entirely by renewable energy via strong solar collaborations, Switch exemplifies best practice in hyperscale sustainability.
Its strategic site enables ultra-efficient cooling and fast fibre connectivity, guaranteeing 100% green power for every workload, every hour.
1. SINES DC – Start Campus
Location: Sines, Portugal
Built: Phase 1 (SIN01) 2024, phase 2+ underway
CEO: Robert Dunn
As Europe’s first gigascale data campus, SINES DC is designed for 1.2 GW of IT capacity, positioning it as the largest fully renewable-powered facility worldwide once complete.
The site leverages pioneering seawater cooling (WUE = 0) alongside Portugal’s ultra-clean power grid, supported by €8.5bn (US$9.9bn) in green investment.
When fully operational, SINES DC will transform digital infrastructure, connecting three continents while operating solely on renewable energy — becoming Europe’s sustainable digital backbone.
