Energy Storage for Rome-Fiumicino Airport.

The whole 10 MWh BESS (Battery Energy Storage System) is fully integrated with “Solar Farm”, the largest self-consumption photovoltaic system in a European airport, designed by ENEL in conjunction with Circet for Aeroporti di Roma, built and integrated by Loccioniby Enel in conjunction with Circet and commissioned in January 2025.

Mercedes-Benz Energy provides a system with more than 5.5 MWh of capacity, accounting for over half of the total storage volume. The system forms part of the Pioneer project and contributes to the airport’s energy concept by supporting the storage and flexible use of solar energy generated on site.

The Pioneer project (airPort sustaInability secONd lifE battEry stoRage), carried out by Enel and ADR (Aeroporti di Roma) with the scientific contribution of the Fraunhofer The system enables the reuse of battery modules from Mercedes-Benz electric vehicles in a stationary energy storage application before recycling.

The energy provider Enel is responsible for developing and integrating the storage system into the airport infrastructure. Loccioni, an experienced system integrator, ensures the seamless technical implementation of the system and its performance. Mercedes-Benz Energy provides a 6-string storage system, distributed across two containers (one 40-foot and one 20-foot), offering a total capacity of over 5.5 MWh. The system is built with repurposed battery modules from Mercedes-Benz electric vehicles.

The storage technology is based on an intelligent modular concept, allowing for the integration of battery modules at different stages of their lifecycle. Modules in different states of aging can be combined within a single system without compromising overall performance. This approach enables a higher packing density and supports efficient system integration. Delivered as pre-installed, function-tested container systems, the solution ensures a short installation time and smooth deployment.

Battery Energy Storage System are equipped with a comprehensive safety architecture, setting new benchmarks with specially developed, extensively tested fire protection measures—proven in previous large-scale projects. Key features include a proprietary, functionally safe battery management system, high-performance NMC battery modules, and an integrated liquid cooling system. The system can be configured for a wide range of stationary energy storage applications, depending on customer requirements and operating conditions.