Innovative hybrid storage system gets underway in Theiss

 Tour of the battery storage facility in Theiss (Photo: Green Energy Lab / Karin Dögl)

The versatile SEKOHS Theiss concept, which will ensure a sustainable and efficient energy storage system, will make a valuable contribution to the energy transition.

Consortium partner EVN invited the members of the consortium to the thermal power plant at the eponymous site in Theiss an der Donau. The consortium discussed the final issues during a tour of the site. Now the question is: Is the new battery storage system ready for pilot operation?

In combination with a thermal storage system, the innovative concept is intended to help maintain grid stability.

Battery storage system expands Power-2-Heat system

The modern battery storage system will make the existing Power-2-Heat system – a large-scale electric instantaneous water heater that is operated with a downstream water storage tank and district heating extraction – even more intelligently manageable. The battery containers have already been installed and all the cables laid.

The battery storage system itself – which is now about to be commissioned – has a capacity of 5 MW. This corresponds to the connected load of around 1,200 households. The capacity, in turn, is around 6 MWh. This could supply an average household with electricity for one and a half years. A lithium iron phosphate battery cell was installed.
In comparison, the Power-2-Heat system has an output of 5 MW. The huge, red-coloured thermal storage tank has a capacity of an impressive 1,650 MWh.

The aim of the project was to further develop a storage technology that fulfils all the necessary requirements in terms of performance, capacity, efficiency, availability and costs. This will enable the ever-increasing proportion of renewable energy in energy production and supply to be utilised even more effectively. And we have succeeded.

Power-2-Heat system with heat storage (Photo: Green Energy Lab / Karin Dögl)

Green Energy Lab was able to accompany the consortium on a tour of the power plant and visit the demonstrator, which represents the first realisation of the innovative hybrid storage system in Lower Austria.

The SEKOHS Theiss project is funded by the Climate and Energy Fund and the Federal Ministry for Climate Action, Environment, Energy, Mobility, Innovation & Technology and is being realised as part of the Green Energy Lab research initiative.