Denver, US – 04 September 2025 – RES, the world’s largest independent renewable energy company, has signed a significant contract with Repsol to provide operations and maintenance (O&M) services for 1.5 gigawatts peak (GWp) of utility-scale solar projects in the United States. The agreement covers four major solar projects across Texas…
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Innovation with purpose
Driving a clean energy future through state-of-the-art renewable technologies.
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A brighter tomorrow
Our solutions are not only innovative, but also safe, reliable, economical, and sustainable.
Backed by in-house expertise, we’re working to ensure everyone has access affordable zero carbon energy.
What we offer
We offer over 40 years of experience developing and building clean energy projects.
Global reach
We’ve developed over 28GW of clean energy projects worldwide.
Maximum value
Our experienced team always develop projects to ensure maximum value.
Tailored solutions
Project specifications are adapted to your needs.
Environmental impact
Sustainability powers everything we do and the decisions we make.
Extensive expertise
Our people are knowledgeable and passionate our about achieving our vision.
Our technologies
Underpinned by innovation and a drive to make the world a better place.
Wind
Delivering both onshore and offshore wind projects, carefully balancing safety, cost, risk, and opportunity to drive best-in-class results.
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Solar
Using our wealth of industry experience to build high performing utility scale solar farms.
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Transmission & distribution
Building and maintaining the electrical infrastructure needed for energy resilience and new power projects.
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Energy storage
Powering flexible ways to facilitate clean energy using our innovative energy storage solutions.
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Green hydrogen
Helping decarbonise industry by developing and operating green hydrogen plants fuelled by clean energy.
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Other Technologies
Using our global experience to maximise the performance and ensure the longevity of our customers assets.
Learn moreOur global reach
We’ve implemented clean energy projects in locations all over the world.
157
Americas 7
Australia 168
Europe Why RES?
Our vision is to create a world where everyone has access to affordable zero carbon energy.
Through internal and external collaboration, our passionate, accountable people, and extensive in-house expertise, we’re working towards building a greener future.
Flexible independence
Access to a breadth of technologies brings flexibility to the way we work.
International impact
We develop, construct and operate projects for clients in 14 countries.
Comprehensive services
We offer development, construction, asset management, and operations and maintenance solutions globally.
Digital innovation
Using AI and machine learning to find new ways to drive positive outcomes.
Latest Resources
Learn more about our projects
De-risking clean energy construction: Four strategies for project success
By Bart Geleynse, Senior Vice President, Business Development – EPC The renewable energy sector is growing at an unprecedented pace, but with this growth comes increased complexity. Project owners are handling increasingly unpredictable supply chains, tight labor markets, evolving technologies and shifting regulations. In this environment, one thing is certain:…
Flexibility is the future of solar and storage
The solar industry has never stood still, and today it’s evolving faster than ever. Once seen as a straightforward generation asset, solar is now at the center of increasingly complex systems that pair generation with storage and other distributed resources. As markets shift, regulations tighten and new technologies emerge, one…