Seasonal storage of solar energy

In order to protect the environment, it is necessary to rely on renewable energies. However, these are subject to significant fluctuations, which is why new solutions for energy storage are needed. Because only then is it possible to guarantee a secure supply even when energy production is temporarily low. Due to their considerable flexibility and balancing potential, heat storage systems are ideally suited for this, as they also enable the integration of renewable energies and waste heat into the energy systems.

What you should know

The innovation

The R&D project FlexModul is developing an innovative, modular and compact sorption storage system. The so-called thermochemical storage is characterized by high energy storage density and flexibility. Furthermore, it has low losses and is easy and safe to use. The investment costs can also be reduced to a minimum, which maximizes the applicability of the concept.

The modular design of the sorption storage allows it to be scaled and adapted to various applications in the heat and power sector. Due to the different areas of application, the enormous potential of thermal storage as cross-sectional technologies becomes visible. This increases the flexibility of the entire energy system, reduces CO2 emissions and allows long-term storage with almost no loss.

The project is also about demonstrating the diverse possible uses of sorption storage using two use cases. The first use case is the seasonal storage of solar energy for a single family home. The second use case demonstrates power-to-heat (P2H) storage in the hospitality industry.


of innovation

  • Three to four times higher energy densities compared to water storage

  • Efficient storage, even over long periods of time

  • Development of a strong and market-ready technology

We'll keep you up to date

Project status: "Ongoing"

Contact person: Mathias Schaffer

We shape the future

Support from Next-Incubator

As a subsidiary of Energie Steiermark, the next-incubator has in-depth know-how in the field of decentralized energy storage. It is precisely with this expertise that the next-incubator accompanies the research and development project FlexModul.