Phenogy presents sodium-ion storage system in Bremen

26.09.2025

Source: E & M powernews

A battery system with sodium-ion technology has been launched in Bremen. According to the manufacturer, it is the first large-scale storage system in Europe based on sodium.

A new battery storage system based on sodium-ion technology has gone into operation in Bremen. According to the storage manufacturer Phenogy, based in Root near Lucerne (Switzerland), this is the first large-scale storage system of its kind in Europe.

The Bremen Battery Energy Storage System (BESS) called "Phenogy 1.0" is installed at the solar system manufacturer Solares Energy GmbH. As a spokesperson explained to the editorial team, the system is linked to an existing 50 kW photovoltaic system there. As the spokesperson explained, the system is operated in stand-alone mode - with the aim of optimizing local energy consumption. The system also supplies charging points for electric vehicles with electricity. According to Phenogy, the battery storage system has an output of 400 kW and an annual storage capacity of almost one megawatt hour.

The company emphasizes that the sodium-ion technology used offers several advantages compared to established lithium systems. For example, it cites the better global availability of sodium as a raw material. Furthermore, the lower environmental impact during extraction and independence from geopolitical risks. The company also highlights the high thermal stability of the cells, which it claims minimizes the risk of fire and explosion.

According to Chief Technology Officer Max Kory, the air cooling system used enables safe and long-lasting energy storage. Phenogy sees potential applications in companies, industrial parks and neighborhoods in particular, but also in critical infrastructure such as hospitals, data centers and airports.

The applications highlighted by the company include self-consumption optimization, emergency power supply and microgrids. The system can also be used to stabilize charging infrastructures in the field of electromobility or to temporarily store electricity from wind and solar power plants.

Phenogy AG was founded in 2019 and claims to employ around 40 people. In addition to the headquarters in Switzerland, there are subsidiaries in Germany and the USA. Development partners include institutes from the Fraunhofer Battery Alliance and Exentis Group AG, a provider of 3D technology platforms for industrial manufacturing.

Author: Davina Spohn