Powering a sustainable future with innovative hot rock thermal energy storage. We save energy from renewables for later use, making a greener grid possible.
Enabling higher shares of wind and solar power by storing excess energy for when it is needed most.
Grensle AB: Pioneering Thermal Energy Storage for a Sustainable Tomorrow
With a decade of dedicated development, we are transforming renewable energy integration through advanced thermal storage solutions.
At Grensle AB, our mission is to maximise the potential of renewable energy sources. We specialise in hot rock thermal energy storage systems that capture and store excess energy generated during peak production periods, such as sunny days or windy conditions.
Our innovative technology enables this stored energy to be released when demand is high or renewable generation is low, ensuring a reliable and consistent supply of clean power. This approach supports a more sustainable and resilient energy grid, reducing reliance on fossil fuels.
Our Featured Services
We offer comprehensive hot rock thermal energy storage solutions. Our systems are designed to save solar power from summer for winter use and capture excess renewables on windy days. This innovative approach makes larger shares of grid-connected wind and solar power possible, by saving energy for later use. We take care of excess renewables for later use.
Meet the Team
Driven by innovation and a passion for renewable energy solutions.
Johan Nilsson
CEO
Kenneth Nordin
CTO / Founder
Katerina Nordin
COO
We’ve worked with some of the best companies.
FAQ
How does hot rock thermal energy storage work?
Our system uses electricity from renewable sources to heat a large mass of rock. The heat is then stored within the rock and can be extracted later to generate electricity or provide heat. This is achieved using a heat exchanger system that circulates air through the hot rock, transferring the heat energy to where it is needed. This process allows us to store energy efficiently and release it when required, bridging the gap between renewable energy production and consumer demand.
What are the benefits of thermal energy storage?
Thermal energy storage offers several key benefits, including improved grid stability, increased utilisation of renewable energy sources, and reduced reliance on fossil fuels. By storing excess energy produced during peak renewable generation times, we can provide a consistent and reliable supply of clean energy even when the sun is not shining or the wind is not blowing. This makes renewable energy more dependable and cost effective.
What types of renewable energy can be stored?
Our hot rock thermal energy storage system is compatible with a wide range of renewable energy sources, including solar, wind, and hydroelectric power. Any excess electricity generated from these sources can be efficiently stored in our system, providing a versatile solution for integrating various renewable energy technologies into the grid. This flexibility makes our technology an ideal choice for diverse energy landscapes.
How long can energy be stored in the system?
Our hot rock thermal energy storage system is designed for long duration energy storage, capable of retaining heat for days, weeks or even months. This capability is essential for seasonal energy storage, such as saving solar energy from summer for use in winter. The longevity of energy storage depends on several factors, but our systems are optimised to minimise heat loss and ensure maximum energy retention over extended periods.
Why Choose Grensle AB?
- Proven technology with operational systems in Europe.
- Enables greater integration of renewables at time with the lowest electricity price.
- Sustainable energy storage solutions with local material.
