France, Sept. 4 -- As electricity systems increasingly rely on renewable energy, storage is becoming a critical enabler of the energy transition. Together, battery energy storage systems and pumped-storage hydropower help balance power systems by storing electricity when generation is abundant and making it available when demand increases. These solutions support the integration of renewable energy, enhance grid stability and resilience, and contribute to security of supply. A major step forward in Central EuropeENGIE has established its first positions in the Polish storage segment and reinforced its presence in Romania through four selective investments. Poland: over the past two months, ENGIE has built a significant foothold in the count...