A total of 36 battery units, each with a capacity of 3. 44 MW, will power a groundbreaking energy-storage project at Athens airport, totaling just over 123 MW. The project, developed by renewable energy specialist Kiefer, is expected to be fully operational by September. It is the largest hybrid power plant of its kind within the premises of any airport in. . Investors face significant challenges in completing Greece's first energy storage projects using batteries. The winning units from the first two tenders, held two years ago, are now gradually reaching implementation. Initially due by September, the deadline was extended by the Ministry of. . Why Is Athens Becoming Europe's Next Battery Storage Hotspot? You know how people joke about Greek summers being all sunshine and souvlaki? Well, here's the kicker - Athens is now turning that relentless sunshine into a 24/7 power source through cutting-edge energy storage. . Battery Energy Storage Systems (BESS) in Greece are transitioning from early-stage pilots to critical infrastructure, driven by a rapidly maturing regulatory framework and increasing investor appetite.