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Sylfen provides Integrated energy storage and production solutions for buildings and eco-districts that wish to secure energy supplies with local and renewable sources.

It offers the Smart Energy Hub, a solution that combines batteries, for their fast switching capabilities, with an innovation: a reversible electrolyser, capable of storing energy in the form of hydrogen and rendering it when needed in the form of heat and electricity. This technology, developed in France, has demonstrated the best electrolysis performance in the world. Thanks to its software and the adaptability of its product, Sylfen can render any zero-energy building autonomous in terms of energy consumption. Sylfen’s development is oriented to serve the construction market with a highly modular product that is fully integrated and optimised to each configuration.


  • Energy Storage
  • France
  • Founded: 2015