Danish Center for Energy Storage

About Danish Center for Energy Storage

Danish Center for Energy Storage, DaCES, is a partnership that covers the entire value chain from research and innovation to industry and export in the field of energy storage and conversion.

The ambition of DaCES is to strengthen cooperation, sharing of knowledge and establishment of new partnerships between companies and universities. Through these collaborations, DaCES seeks to ensure a long-term, focused and coordinated effort between all relevant players in areas of technology such as thermal energy storage, battery technology, system integration and Power-to-X.

In the future wind and solar energy should account for as much as possible of our energy supply. This creates new challenges in terms of securing accessible energy when demanded. Energy is only generated whenever the wind blows or the sun shines. As a result of these energy fluctuations it will be essential to balance supply and demand instantaneously and in a flexible way. It will also be important to combine the different energy sectors, such as electricity, gas, and district heating in order to store excess energy as e.g. heating or green fuels.

Denmark has a strong tradition for a triple helix cooperation between universities, industries and the government. We are pioneers in renewable energy and we have a high degree of sector coupling and digitization. This provides unique possibilities for research, innovation and export of novel solutions for energy storage and at the same time helps us to reach our national climate goal. However, this requires political focus and even more cooperation between knowledge-based institutions and businesses.

Why Energy Storage?

A reliable energy system based on renewable sources without energy storage would require an excess capacity beyond realism. It would most certainly result in down-regulation of the capacity most of the time. As of today down-regulation is expensive since owners of wind turbines and solar cells are compensated for periods of stalling production, as well as the fact that the power grid of Denmark is not dimensioned to such an expansion. And even if it could be done, we would still have times where renewable energy couldn’t fulfill the energy demand and then supplementation of fossil fuels would be necessary.

In other words, energy storage is the one and only way to reach a 100% renewable energy system.


Batteries, in particular lithium ion batteries, are among the most well-known and economically feasible technologies for energy storage. As of today it is the only realistic solution for batteries in electric cars, mobile phones and similar mobile devices. But there is a downside. The batteries are based on lithium, a chemical element of limited deposits. However, the lithium battery beats electric cars when it comes to eco efficiency, and new technologies that are less resource demanding are already being examined.

Thermal Energystorage

Thermal energystorage comes from storing energy from renewable energies in the form of heat, which in then can be used in district heating systems or be re-converted to electricity through a turbine. The heat can be stored in rocks, water, molten salts, or other phase-changing materials. The technology can be used in large water and stone basins that can be used for balancing electric and district heating systems as well as helping to lower the need for peak load capacity. However, the technology can also be used on smaller scale by businesses, where excess heat from production can be utilised. As of right now ongoing research in the usage of thermal storage at household level is being performed, where small-scale molten salt based storages can be combined with heat pumps.


Power to X implies converting one kind of energy (mainly electricity from a renewable source) to another form. As of today, most of the research revolves around storage in the form of hydrogen or ammonia. These fuels can be used in e.g. in air transport and shipping, or in those parts of heavy industry that cannot be electrified. The fuels can be re-converted to electricity, which makes the technology very suitable for balancing the electricity net, when electricity production is higher than demand, hence the surplus energy can be stored. The downside is that the conversion loss at present time amounts to as much as 70%.

The technology is promising, both in terms of balancing the electricity net of the future and when it comes to overcoming the challenges presented by emissions from heavy industry and transport. However, it will require extensive investments in research as well as innovation.

System Integration

System integration is the art of connecting various energy systems and consumers with eachother. The term covers a physical element, meaning connecting electricity, gas, district heating systems and integration of PtX plants, as well as a digital element, that performs intelligent regulation of the energy system as a whole. This needs to be designed in a way that also includes the transport sector, the building stock, and flexible interaction with industry businesses.

Become a member

We invite you and your business to join us in DaCES in developing the area of energy storage. It’s free of charge up until 2022, and gives you access to exclusive webinars and events hosted by the center among other things. The only requirement is that you are registered in the Danish CVR system and that you work directly or indirectly with energy storage.

Additional information about membership can be found here

The next chapter in the green transition is currently being written and energy storage is a game changer in a new and climate neutral energy system. However investment is required, so the solutions can be upscaled and make the new technologies more feasible. Meanwhile research needs to be strengthened so that Denmark can become a research flagship within storage and conversion of energy.

Troels Ranis, Branch manager, DI Energy

As the worlds largest wind turbine manufacturer both energy storage- and conversion are the most important areas for us and the green transition. But if Denmark wants to set a global sustainable agenda as well as making energy storage the new export adventure, we need a focused effort and a distinct political agenda.

Kasper Roed Jensen, Vice President, Next Gen Concepts and Partnering, Vestas.

Energystorage will become central in our future sustainable energy system as the flexible piece of technology that links production and consumption in an efficient way. Therefore it is absolutely crucial to establish a collaboration platform that brings forth all players from the chain of value, from groundbreaking research to implementation and commercialization.

Lasse Rosendahl
Instituteleader and professor, AAU Energy

We need to electrify our society where it is possible. But there will still be areas where electrification won’t be a passable way, such as aviation, shipping and possibly heavy transport.

PtX can help us to achieve a solution to these problems and is a necessary remedy , if Denmark is to meet the reduction goals of 2030 and 2050. This demands political focus and long-term priorities, that can reduce the investment risk and help with creating a customer market.

Kim Grøn Knudsen
Chief Strategy & Innovation Officer, Haldor Topsøe

Energy storage is one of the key points in succeeding with the green transition. In ATV our ambition is that energy storage is to become one of the areas of technology, where Denmark is leading in the world. Danish corporations shall gain a position of strength, that builds on a close interaction between research and corporations – with an ambition of contributing to a sustainable planet as well as ensuring jobs, export and earnings in Denmark.

Lia Leffland
Academy manager, ATV

Green Methanol in fuel cells can become a significant contributor in the transitioning of heavy transport, where we with the right support, research and development expect to outmatch fossil fuels in the long term. In Danish Center for Energy Storage we ensure the broadest possible collaboration across  the entire chain of value in Denmark for the benefit of Danish development of technology and export.

Hans Aage Hjuler
Chief Scientific Officer, Blue World Technologies

The climate goals of 2030 and 2050 are ambitious and requires a close and focused interaction between all relevant players. Development and integration of energy storage has a crucial role in the green transition, and there the universities contribute with both development of disruptive technologies, transfer for corporations and education of society.

Horst-Günther Rubahn
Institutdirektør og professor, SDU Mads Clausen Institut

If Denmark is to interfere in the global competition seriously and take the leading role within energy storage and conversion, then it is crucial that the entire chain of value is to be considered and implemented in a close collaboration and dialog between all stakeholders.

Søren Linderoth
Institutdirektør og professor, DTU Energy