Top 10: Data Centres Using 100% Renewable Energy

Data centres are the beating heart of the digital economy, but their rising energy demands mean sustainability is now under the spotlight. Operators are racing to expand capacity while keeping carbon emissions in check.

A growing number of hyperscale and colocation facilities are proving that scale and sustainability can go hand in hand, running entirely on renewable sources like wind, solar and hydropower.

Our Top 10 ranking this week showcases the world’s largest data centres powered 100% by renewable energy, ranked by a combination of their capacity, innovations and role in building a greener digital future.

10. Telehouse South (KDDI)

• Location: London, United Kingdom
• Built: 2022 (expanded 2024)
• CEO: Kenkichi Honda (MD of Telehouse Europe)

Telehouse South, an ambitious refurbishment in London’s Docklands, is set for a total IT capacity of 18 MW, powered by wind, solar, biomass and hydro. 

Telehouse, a subsidiary of KDDI, operates all London facilities solely using 100% certified renewable energy. 

The cooling system leverages high water temperatures and ambient UK air for year-round efficiency, with plans to recycle waste heat to nearby buildings – demonstrating sustainability even in a dense urban core.

9. Iron Mountain London (LON-2)

• Location: London, United Kingdom
• Built: 2021
• CEO: William Meaney

The Iron Mountain London campus (27 MW) in Slough is powered entirely by renewable energy and meets strict BREEAM sustainability standards. 

Since 2017, Iron Mountain’s entire global portfolio, including this multi-tenant hyperscale facility, has been powered by 100% renewables. 

Its industry-leading Green Power Pass lets tenants report their usage as truly carbon-neutral and hourly carbon tracking is setting trends in the sector.

8. EcoDataCenter 1

• Location: Falun, Sweden

• Built: 2019

• CEO: Peter Michelson

EcoDataCenter 1 is a large-scale, high-density hyperscale facility with 90 MW total available power, fully powered by renewable electricity – 75% from local hydropower and 25% from nearby wind farms. 

Its innovative architecture is paired with a PUE of just 1.2 and a significant focus on heat recapture and local energy synergies. 

As a result, EcoDataCenter 1 ranks among Europe’s greenest data hubs and acts as a model for operational excellence in carbon-free digital infrastructure.

7. Viborg Data Centre – Apple

• Location: Viborg, Denmark
• Built: 2019
• CEO: Tim Cook

Apple's Viborg Data Centre is a flagship of sustainable hyperscale in Europe, operating completely on wind and solar power guaranteed by long-term agreements and on-site generation. 

The facility is expanding its integration into local infrastructure by supplying waste heat to the city’s district heating system, further reducing the environmental impact. 

Since its inception, Apple has met all operational needs here with certified renewable energy and its Viborg complex is central to its drive to carbon neutrality across its global operations by 2030.

6. Moro Hub Data Centre (DEWA)

• Location: Dubai, UAE
• Built: 2023
• CEO: Mohammad Bin Sulaiman

The world’s largest solar-powered data centre, with a 100 MW+ capacity, sits within Dubai’s massive Mohammed bin Rashid Al Maktoum Solar Park. 

Run by Digital DEWA (Moro Hub), it is Uptime TIER III-certified and supports regional digital transformation, using only solar power. 

The facility avoids more than 10,000 tonnes of CO₂ annually, aligning with the city’s Net Zero by 2050 strategy.

5. Scala’s Tamboré Campus

• Location: São Paulo, Brazil
• Built: Phase 2 operational 2024
• CEO: Marcos Peigo

Scala Data Center’s Tamboré Campus is one of the largest in Latin America, set for a staggering 600 MW on completion. 

The entire campus is powered by wind and hydropower via Brazil’s green grid and new long-term power purchase agreements, pioneering local renewable integration. 

Scala also emphasises cutting-edge efficiency, low water usage and robust ESG frameworks in all operations.

4. Switch SuperNAP (Las Vegas)

• Location: Las Vegas, USA
• Built: 2008
• CEO: Rob Roy

With a capacity of 315 MW (scalable to 495 MW), Switch SuperNAP runs entirely on renewable energy via utility-scale solar partnerships. 

This Tier 5 campus supports mission-critical enterprise and public sector workloads and exceeds regulatory standards for redundancy and green power. 

Switch’s ongoing expansion pushes zero-carbon IT infrastructure at hyperscale levels.

3. Eagle Mountain Data Centre – Meta

• Location: Eagle Mountain, Utah, USA
• Built: 2018–2023
• CEO: Mark Zuckerberg

The Eagle Mountain Data Centre, operated by Meta, is one of the world’s largest single-site data centres with more than 900,000 square feet and scalable multi-hundred-MW IT capacity. 

It is 100% powered by renewable energy, with dedicated new on-site and off-site solar projects (more than 800 MW in Utah alone) supporting its operation. 

Innovations such as open-air cooling save enormous amounts of water and the synergy of utility green tariffs with direct Power Purchase Agreements secures true sustainability at massive scale.

2. Switch Citadel Campus

• Location: Tahoe Reno, Nevada, USA
• Built: 2017
• CEO: Rob Roy

Spanning upwards of 7.2 million square feet and providing as much as 650 MW, the Switch Citadel Campus is one of the largest and greenest in the world. 

Powered entirely by renewable energy through robust solar partnerships, Switch sets the benchmark in sustainable hyperscale design. 

The campus’s location allows for highly efficient cooling and rapid fibre connectivity, while securing 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 set for 1.2GW IT capacity, making it the largest fully renewable-powered facility globally upon completion. 

The campus uses innovative seawater cooling (WUE = 0) and Portugal’s exceptionally clean grid and is underpinned by €8.5bn (US$9.9bn) of green investment. 

Once fully realised, SINES DC will redefine digital infrastructure, linking three continents while running exclusively on renewable energy – and serving as Europe’s sustainable data backbone.