Unlock Renewable Energy Potential With Grensle Large Scale Power Storage Systems
Store excess renewable energy for later use with our hot rock thermal storage systems. Powering a sustainable future by enabling greater integration of solar and wind power into electrical grids.

Our Energy Storage Solution
Grensle AB provides advanced hot rock thermal energy storage. Store solar energy from summer for winter and manage surplus renewables during peak production. Our technology enhances grid stability.
Seasonal Energy Storage
Our hot rock thermal energy storage enables seasonal energy storage. Saving solar energy during the summer months for use in winter. Overcome the intermittency of solar power and provide a reliable source of renewable energy throughout the year. This ensures a consistent supply of clean energy, reducing reliance on fossil fuels.
Grid Stabilisation
Manage excess renewable energy production on windy days and sunny weekends. Store surplus energy for later use, ensuring grid stability and prevents energy waste. Integrating more intermittent renewable sources without compromising grid reliability. Our technology supports a balanced and resilient energy network.
Increased Renewables
Our technology allows for a greater proportion of wind and solar power to be connected to the grid. Our energy storage solutions address the challenge of intermittency and make renewable energy more dependable. This ensures a consistent energy supply and promotes the transition to a cleaner energy mix. Supporting sustainable energy future.
Proven Technology
Benefit from a decade of innovation with Grensle AB’s hot rock thermal energy storage. Our systems are up and running, delivering real-world results. Our experience ensures reliable and efficient energy storage solutions. Trust in our proven technology to optimise your renewable energy infrastructure.
Scalable Solutions
Our hot rock thermal energy storage solutions are scalable to meet your specific energy needs. From small-scale community projects to large-scale grid applications, we offer tailored solutions. Increase capacity of energy storage as your renewable energy production grows. Meeting the evolving demands of the energy landscape.
Reduced Carbon Footprint
Reduce your carbon footprint and support a sustainable future with our energy storage solutions. By maximising the use of renewable energy and reducing reliance on fossil fuels, we can minimise environmental impact. Join us in creating a cleaner, greener world for future generations. Investing in a sustainable energy future.
Hot Rock Thermal Energy Storage Advantages
Discover the benefits of Grensle AB’s hot rock thermal energy storage. Our technology optimises renewable energy use by storing surplus energy for when it is needed most. Reduce grid strain and make a bigger share of renewable energy possible, by saving energy for later use. Our solution lowers energy costs and supports a sustainable energy future.
Renewable Energy Integration
- Store excess solar power from summer months to cold winter days
- Capture wind energy during windy days with low or negative electricity prices
- Enhance grid stability


Thermal Storage Benefits
- Reduce energy costs. Become indepentent. Don´t worry about fuel prices for natural gas, coal or biomass.
- Lower carbon emissions. The heat sources with combustion boilers are no longer necessary. Stop considering carbon capture technology at your heat plant.
- Support green initiatives and improve the local environment by reducing emissions
Grensle AB’s energy storage has transformed our grid management. We can now reliably store excess renewable energy, reducing our carbon footprint. A truly innovative solution.

Pär M
Head of grid utility operations, region of Jämtland
Progress postings
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