Renewable energy generation continues to scale rapidly, but the ability to store and dispatch that energy reliably remains one of the industry’s biggest challenges. Short-duration battery systems cannot economically support long-duration needs, and solutions like pumped hydro are limited by geography and permitting constraints.
GreenRock Energy addresses this gap with long-duration energy storage (LDES) solutions designed for flexibility, scalability, and real-world deployment.
GreenRock Energy holds exclusive access to CHESS (Cold Heat Electrical Storage Systems), a solid-mass thermal energy storage technology engineered to deliver reliable energy storage across extended durations.
CHESS stores energy as heat within solid materials. The system is charged using low-cost or excess electricity and can discharge that stored energy as electricity or industrial process heat when demand arises.
This approach avoids the limitations of liquid-based systems, eliminates dependence on specific geographic conditions, and enables consistent performance over long operational lifespans.
The CHESS system operates through a straightforward but powerful process:
Electricity—often from renewable sources—is converted into thermal energy and stored within solid materials
Energy is retained with minimal loss over extended periods
Stored energy is converted back into electricity or delivered as usable heat for industrial applications
This flexibility allows CHESS to operate across multiple use cases, adapting to both grid and industrial energy demands.
CHESS offers a significantly lower capital cost per kWh at long durations compared to traditional battery systems.
Designed for 8 to 100+ hour storage durations, enabling true long-duration energy solutions.
Solid-state design ensures long operational life with little to no performance degradation over time.
Unlike pumped hydro, CHESS can be deployed in a wide range of locations without reliance on terrain or water resources.
Delivers both electricity and industrial-grade heat for flexible deployment, expanding its value across multiple sectors.
Energy storage solutions are often evaluated in isolation—but real-world deployment requires matching the right technology to the right use case.
Effective for short-duration applications but becomes cost-prohibitive at longer durations
Proven but geographically limited and capital-intensive
Scalable, flexible, and economically viable for long-duration applications
While companies like Rondo Energy focus exclusively on thermal energy storage, GreenRock Energy integrates CHESS as part of a broader infrastructure strategy—ensuring each project uses the most effective solution available.
CHESS is not a standalone solution—it is a core component within a broader infrastructure platform. It can be deployed across multiple applications to enhance system performance and economic outcomes:
This adaptability makes CHESS a critical tool for bridging the gap between renewable generation and consistent energy demand.
GreenRock Energy is focused on deploying CHESS in near-commercial and scalable applications, prioritizing real-world performance over theoretical potential.
As demand for long-duration energy storage continues to grow, CHESS is positioned to play a key role in enabling reliable, cost-effective energy systems across industries and geographies.
If you are evaluating long-duration energy storage solutions or exploring ways to improve system reliability and efficiency, GreenRock Energy provides the expertise and technology to move forward with confidence.
