Utility-Scale BESS Supporting Romania's Renewable Energy Transition

Romania is rapidly advancing its renewable energy transition, with Transylvania emerging as a key hub for clean energy development. As the country moves toward a greener, more resilient power system, energy storage has become increasingly important for enhancing grid stability and integrating renewable generation. To support this transition, Sieyuan Electric delivered a 49 MW/98 MWh battery energy storage system (BESS). Designed to provide two hours of energy storage, the system helps balance renewable power fluctuations while improving grid reliability and operational flexibility.

• High compliance and grid-connection standards — As an EU member state, Romania enforces stringent technical and safety requirements for grid-connected energy storage systems. The project required full compliance with local grid codes and rigorous certification and grid compliance testing, without compromising quality or system performance.

• Aggressive delivery schedule — The client required an exceptionally short lead time from order confirmation to on-site delivery. The project schedule was tightly aligned with a predefined grid connection window, leaving minimal margin for delay. Meeting this deadline required close coordination across manufacturing, procurement, logistics, and project management teams.

• Complex global logistics and end-to-end project management — Transporting large-scale energy storage equipment involved inland transportation, customs clearance and sea freight. Coordinating these activities across multiple countries and stakeholders required meticulous planning and real-time execution to ensure on-time delivery.

• Modular product design — The system integrates liquid cooling, battery packs, PCS, and BMS into a standardized 20-foot container. This all-in-one design eliminates the need for separate battery and PCS containers, simplifying transportation, installation, and commissioning while improving overall deployment efficiency.

• Large-scale intelligent manufacturing — Leveraging its intelligent manufacturing base, Sieyuan ensured high-precision production and consistent product quality. Agile supply chain management shortened the manufacturing cycle by approximately 20% compared with industry standards.

• Global logistics and end-to-end project management — A dedicated cross-functional team managed every stage of project execution, from factory dispatch and ocean transportation to European inland logistics and final on-site delivery. Early coordination with local authorities and grid operators further streamlined installation and accelerated grid connection, ensuring smooth project implementation.

• Compact footprint with lower construction costs — The AC/DC integrated architecture, combined with a mirrored back-to-back layout, reduces land requirements and construction costs by 30% while significantly increasing power density. For the European market, where land availability is limited and construction costs remain high, this compact design delivers substantial commercial value.

• Pre-assembled & ready to run — Fully assembled and shipped as a complete integrated unit, eliminating on-site assembly of major components, reducing installation risk, and accelerating deployment. The standardized container design and pre-integrated delivery demonstrate reliable cross-border project execution.

• Seamless global logistics and full-cycle team collaboration — The Sieyuan team provided end-to-end oversight of sea freight and export customs, ensuring timely, damage-free arrival at port. Beyond transportation, the team coordinated closely with the client's local staff and provided on-site technical support for unloading and grid connection.