World’s largest off-grid utilities system powers The Red Sea

The evolution of sustainable infrastructure has reached a defining milestone, proving that mega-scale developments can operate entirely independently of conventional national grids.

The world’s largest integrated off-grid utilities system has entered commercial operation at The Red Sea destination in Saudi Arabia. The milestone follows the signing of the Project Commercial Operation Date (PCOD) between Marafiq Red Sea for Energy Company – an Acwa-led consortium with SPIC Huanghe Hydropower and Saudi Tabreed – and The Red Sea Utilities Company, a subsidiary of Red Sea Global.

Marking the official commencement of a 25-year concession, the agreement confirms that all primary utility networks across the luxury destination are in active commercial service. This represents the first time a giga-project in the Kingdom has brought its entire utilities infrastructure online powered exclusively by renewable energy, without reliance on or support from the national grid. The system now supplies operational hotels, community facilities, the staff village, logistics networks, an electric fleet, and the Red Sea International Airport.

World-Record Solar and Storage Capacity

Continuous energy delivery across the coastal destination is underpinned by a massive standalone generation and storage network. The setup pairs a 340 MWac solar photovoltaic plant with a 1,227 MWh battery energy storage system – the largest off-grid battery installation constructed anywhere in the world. Delivering up to 760,000 MWh of clean electricity annually, the system prevents roughly 600,000 tonnes of carbon dioxide emissions each year at full capacity. Furthermore, the infrastructure is designed to scale dynamically alongside the destination as future hospitality phases open.

Highlighting the importance of this milestone, Mohammad Abunayyan, Founder and Chairman of Acwa, stated: “The Red Sea project embodies the ambition of Saudi Vision 2030 and the vision of His Royal Highness Prince Mohammed bin Salman bin Abdulaziz Al Saud, Crown Prince and Prime Minister, to deliver pioneering projects that redefine modern infrastructure and reinforce the Kingdom’s position as a global leader. As the world’s largest integrated off-grid utilities system, and the first of its kind at this scale, the project sets a new global benchmark for sustainable development.”

Comprehensive Multi-Utility Network

The concession spans five interconnected utility sectors delivered as a single cohesive platform:

• Potable water production across three seawater reverse osmosis (SWRO) desalination plants.
• A municipal sewage treatment plant treating 16,000 cubic metres of wastewater daily to create wetland habitats and irrigate the RSG nursery and Shura Links golf course.
• A centralised waste management centre dedicated to resource recovery and responsible material processing.
• An energy-efficient district cooling infrastructure delivering 32,500 refrigeration tons (RT) to hospitality venues and airport facilities.
• Full charging and support networks for land- and sea-based electric vehicle logistics fleets.

Funded through approximately USD 1.33 billion in senior debt within a total investment of c. USD 1.84 billion, the development demonstrates landmark bankability for pioneer off-grid infrastructure. Engineering, procurement, and construction were completed by EPC contractor SEPCO III (the Shandong Tiejun consortium), achieving 30 million lost-time-injury-free hours in a complex coastal setting. Acwa Operations will manage operations and maintenance over the 25-year concession.

Ecological Protection and Local Industry

Developing utility infrastructure within pristine coastal and marine ecosystems required strict environmental safeguards. All utility packages underwent comprehensive Environmental and Social Impact Assessment (ESIA) processes, securing permits from the National Center for Environmental Compliance (NCEC), with Marafiq executing ongoing monitoring to protect terrestrial and reef habitats.

Emphasising the environmental philosophy of the project, John Pagano, Group CEO at Red Sea Global, said: “This milestone brings our vision for a new model of regenerative tourism to life at full scale. By operating without a connection to the national grid and powering the destination entirely through renewable energy, we are demonstrating how sustainable infrastructure can support tourism that gives back to the natural environment and communities on which it depends.”

Local content was prioritised throughout construction and continues in operations. Materials were sourced from domestic suppliers wherever viable, with Saudi engineers working across all technical packages. Over the 25-year concession, the partnership will expand domestic expertise and build a resilient local supply chain aligned with Saudi Vision 2030.