IN Brief:
- The Deinze project provides 10MW / 55MWh of battery energy storage capacity.
- The system connects to the Fluvius distribution grid in Belgium.
- The project uses 11 liquid-cooled 5MWh battery units for up to five-hour cycles.
Sunwoda Energy and EcoSourcen have completed a 10MW / 55MWh battery energy storage project in Deinze, Belgium, creating one of the largest battery parks connected to the Fluvius distribution grid.
The project uses 11 Sunwoda 5MWh liquid-cooled energy storage units, enabling up to five hours of continuous charge and discharge per cycle. The system is designed to store excess renewable electricity and release it during periods of higher demand, supporting load shifting, distribution-level flexibility, and more efficient use of local grid capacity.
EcoSourcen developed the project with financing from Patronale Life, while Sunwoda supplied the battery and system technology. The project was delivered in line with local grid-code and operational requirements, with representatives from Deinze, EcoSourcen, Sunwoda, and Fluvius attending the opening event.
The project site, also referred to as Suerza, provides an operational battery park connected below the transmission system. Its five-hour configuration gives it a longer operating window than many early battery projects and allows the asset to address demand and generation variation across a wider part of the daily cycle.
Distribution-connected storage is becoming more prominent across Europe as solar PV, EV charging, electrified heat, and industrial demand alter local network conditions. Many distribution systems were originally designed around one-way electricity flows from central generation to end users. Higher levels of distributed generation and flexible demand are changing that operating model, creating new requirements for voltage management, congestion control, and local balancing.
A battery connected at distribution level can absorb local renewable generation, smooth demand peaks, reduce stress on constrained feeders, and defer reinforcement where network conditions allow. Those benefits depend on how the asset is dispatched and how closely its operation is coordinated with distribution system requirements. Poorly scheduled charging can add to local peaks, while well-managed operation can release capacity and reduce strain on the network.
The Deinze project also shows how battery deployment is moving into more localised network applications. Transmission-connected assets remain central to wholesale balancing and system services, but DSO-level storage can address congestion closer to where it appears. That distinction is becoming more relevant as flexibility markets develop and distribution system operators seek alternatives to conventional reinforcement.
Technical integration remains a central part of distribution-level deployment. Battery systems must comply with grid-code requirements, protection settings, fire safety rules, communication needs, and operating limits set by the network. Liquid-cooled containerised systems can support higher energy density and thermal management, but long-term performance will depend on controls, maintenance, degradation management, and dispatch strategy.
Sunwoda’s involvement reflects the growing role of battery manufacturers in European project delivery beyond cell supply. Developers increasingly require containerised systems, power conversion integration, commissioning support, lifecycle service, and evidence of grid compliance. As storage projects move from pilot scale to network infrastructure, delivery capability and operational support are becoming as important as headline capacity.
The Deinze battery adds practical storage capacity to Belgium’s distribution network and gives Fluvius-connected infrastructure a live example of longer-duration local flexibility. As European networks absorb more distributed generation and electrified load, similar projects are likely to become part of the normal planning mix for local grid operation.