Siliștea Battery Energy Storage System (BESS)
Battery Energy Storage Systems (BESS) have become a cornerstone of the energy transition, addressing the main challenge of renewable generation: its variability. A grid-scale battery stores energy when it is abundant and releases it when needed, turning intermittent wind power into a predictable and more valuable resource.
As a natural extension of the Siliștea Wind Farm, we have commissioned a 7.4 MW / 15.1 MWh BESS facility, directly connected to the wind farm’s substation. The system performs a dual role: it materially reduces the wind farm’s balancing costs (by automatically compensating deviations between forecasted and actual production) and captures intra-day price spreads in the electricity market through arbitrage trading.
The technology is designed, built and operated in Romania. Unlike conventional container-based solutions, our system uses a warehouse-hosted architecture that delivers thermal stability across all seasons, ~90% round-trip efficiency, and an extended cell lifetime. Safety is built-in through a multi-layered approach: a preventive Oxygen Reduction System (ORS) combined with high-pressure nitrogen inertisation. The plant runs fully automated.
The Siliștea BESS has been in commercial operation since February 2026.