Revolutionary electricity storage with heating/cooling system for buildings on the verge of market maturity

14.12.2021 ⅼ Hasle b. Burgdorf ⅼ Zurich

SCHWEIZER KAPITAL GLOBAL IMPACT FUND AG is investing CHF 2 million in the Swiss start-up Green-Y Energy AG to develop a sustainable compressed air energy storage system for use in buildings and is also pledging CHF 1 million in purchase commitments.

The patented compressed air concept combines electricity storage, heat and cold generation in one device and promises a significant reduction in energy costs and CO2 emissions from buildings.

“Against the backdrop of sharply rising energy prices and ambitious climate targets, these are two highly relevant topics. I was also totally convinced by the founding team and the technology.” (Umut Ertan, founder of SCHWEIZER KAPITAL GLOBAL IMPACT FUND AG).

Unlike batteries, the system does not rely on rare, often climate-damaging raw materials: “We use air and water in our systems, which leads to a long service life and makes the system 100% recyclable.” (Rafik Barhoumi, CEO of Green-Y Energy AG).

The investment will enable the leap from prototype to market maturity in 2023. The multi-award-winning, highly innovative company is receiving development support from the University of Applied Sciences Northwestern Switzerland as part of an Innosuisse innovation project. “The combined approach promises high overall efficiency, innovative technical components reduce system costs – this enables economical operation.” (Prof. Dr. Beat Ribi, Head of the Institute of Thermal and Fluid Engineering at the University of Applied Sciences Northwestern Switzerland).

Umut Ertan is a visionary in the logistics and impact sector and was a pioneer in launching an impact fund for purely disruptive technologies at the beginning of 2018. He has founded over 10 companies himself and sold 2 of them to European players. With this investment, he underlines his commitment to impact investments and will support Green-Y in its market entry and further growth, primarily through his network in the logistics and real estate world in Europe.

If you would like to find out more about the technology and the offer, please contact Peter Fritzen (


SCHWEIZER KAPITAL GLOBAL IMPACT FUND AG was founded by Umut Ertan and has been the first specialized impact investor in Germany, Austria and Switzerland for exclusively disruptive business models and game-changer technologies since 2018.

Press contact

Kathrina White


Bahnhofstrasse 54
CH-8001 Zurich

About Green-Y Energy AG:

Green-Y Energy AG was founded in 2020 with the aim of revolutionizing the global electricity storage market. With the funds from the seed investment round of CHF 825,000, the now six-person team was able to verify the patented electricity storage concept with a prototype and already win customers for initial pilot projects.

Press contact

Peter Fritzen

Green-Y Energy AG

Chamerie 40
CH-3415 Hasle b. Burgdorf