Energy storage for the energy transition.
Comprehensive. Stable. Economical.


Energy storage for the heat transition.

The expansion of renewable energies increases the need for systems

that can produce, store and supply energy reliably and at all times.


To meet this demand, we have developed regryd, a patented long-term high-temperature storage system. The storage is made of recycled and recyclable materials which store surplus wind and solar energy and waste heat from industrial processes.


As an interface, regryd allows interaction between all important sectors: electricity, heat, transportation and power supply to muni-cipalities. Serving to the heat and energy turnaround, our storage system also achieves adaptation to medium and long-term climatic changes continuously favorable, modular, flexible and long-term energy buffering.

Jörn Jacobs explains the importance of long-term storage for the energy transition  

A regryd storage system is a patented high-temperature long-term storage system that stores waste heat or renewable energy in the form of heat. Electricity or heat arrives on the input side: Heat is stored directly, while the electricity is converted into heat via a hot air generator. The hot air then flows into the storage tank and is stored in basalt rock with a defined porosity and grain size. An insulating layer of power station ash ensures low heat losses of around 0.15 per cent per day. This makes regryd a high-temperature and long-term storage facility.






The regryd heat storage

regryd is a modular high-temperature solid-state heat accumulator. A natural stone filling used as a storage medium allows for an almost unlimited service life. Low heat losses guarantee high storage efficiency. regryd can be easily set up in combination with wind and solar power or industrial waste heat.

  1. It is a systemic storage solution that continuously provides stored energy to ensure highly reliable and consistent supply.
  2. regryd also works as a short-term storage unit to balance the solar day-night cycle and as a seasonal long-term thermal energy storage unit to balance the annual cycle. For this, the heat regryd stores is provided as thermal and process heat, or it can be used to generate electricity and cooling.
  3. The storage temperature of approx. 850  °C results in a high storage capacity, so that regryd can be built in a way that saves volume and space and is thus cost-effective.


Key figures at a glance 


Maximum storable temperature

≥ 90 %


405 kWh/m³

Maximum Storage capacity

≤ 16 W/m²

Heat loss

Industries and areas of application 


Chemical industry

Energy storage systems like regryd facilitate efficiency gains in production processes and the systematic utilisation of waste heat in downstream processes, either as district heating in local communities or for other material uses.


Metal processing industry

By introducing innovative storage technologies like regryd, the metal processing industry can cut its CO₂ emissions while also storing and reconverting unavoidable waste heat. 


Power supply companies

Depending on its scale, regryd can avoid CO₂ emissions and create flexibility in the energy system – thereby laying the foundations for supply security and greater energy independence.


Contracting companies

regryd enables contracting companies that specialise in providing heat and electricity to expand their portfolio and generate new energy services.


Municipal waste disposal companies

regryd is a crucial step on the road towards climate-neutral municipalities. With regryd, unavoidable waste heat can be channelled into the storage system and then made available when needed.

Your contacts 

Chief Executive Officer

Jörn Jacobs

As CEO, he builds on extensive experience gained in the construction of environmental, energy and factory systems. At regryd, he is bringing an innovative energy storage solution to the market through a spin-off from IPROconsult GmbH.

joern.jacobs (at)
Development Engineer

Andreas Prautsch

The design engineer oversees technical implementation of the energy storage system. His engineering experience includes developing a prototype bypass system for extracting heavy minerals from quartz sand.

andreas.prautsch (at)

Your message to us