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Sperra - Subsea Pumped Hydroelectric Energy Storage System

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Sperra Subsea Pumped Hydroelectric Energy Storage is an innovative technology designed to enhance renewable energy integration, particularly with offshore wind and solar plants. Addressing the critical need for Long-Duration Energy Storage (LDES), it employs large concrete spheres placed on the ocean floor, using water movement to store and release energy. This subsea system can be utilized independently along coastlines or in conjunction with offshore energy installations, allowing for significant cost savings and new revenue streams. Key features include a patented multi-sphere 'pod' design and local manufacturing through automated 3D concrete printing, reducing costs by streamlining construction processes. With modules ranging from 2 MW to 5 MW, the system is constructed using locally sourced materials, boosting domestic employment. It enhances grid resiliency by creating new offshore storage sites and offers environmental benefits like minimal land disruption and resilience to climate-related challenges. This aligns with the goals identified by multiple national energy authorities to support decarbonization strategies.
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Meeting Global Carbon Emission Goals with Long-Duration Energy Storage
To achieve global net-zero emissions by 2050, it’s estimated that 70% of electricity generation must come from renewable energy. However, generation from wind and solar doesn’t always align with grid demands. To ensure grid resiliency and meet fluctuating periods of peak electric demand, there is a critical need for Long-Duration Energy Storage (LDES).

Pumped Storage Hydropower is currently the dominant form of LDES. But new deployments face hurdles, such as permitting issues, geographic limitations, and high costs. These barriers hinder the expansion of pumped storage hydro and underscore the need for innovative solutions to support decarbonization.

Introducing Sperra Subsea Pumped Hydro Storage
Sperra Subsea Pumped Hydroelectric Energy Storage is a groundbreaking solution that will expand the buildout of offshore wind and solar integrated with near-shore energy storage. Our solution offers all the benefits of conventional pumped storage hydro while sidestepping many of the siting and development constraints that hamper its expansion on land.

 

Subsea Pumped Hydroelectric Energy Storage operates by moving water in and out of large concrete spheres on the ocean floor to store and release energy as needed. It can be set up independently along coastlines or alongside offshore wind plants for cost savings and additional revenue opportunities. 

This approach facilitates cost-effective subsea LDES through innovations such as our patented multi-sphere “pod” design, localized manufacturing using automated 3D concrete printing, and integration with offshore renewable energy plants to share infrastructure and reduce costs.

 

Increased grid resiliency

The technology will create new offshore energy storage sites close to large population centers, facilitating grid integration and resiliency.

Improved project economics

Integrated with offshore wind and solar, Sperra MPH reduces the need for energy curtailment, driving additional project revenues.

Lower cost manufacturing

Sperra lowers the cost of manufacturing by replacing the labor-intensive process of conventional concrete construction (e.g., formwork assembly, casting, formwork removal) with an automated, lean manufacturing line using 3D printing.

Domestic manufacturing and local jobs

The technology will create local jobs through domestic manufacturing and relies on abundant, regionally available materials for construction (concrete, steel and copper).