Recently, the first phase of the 300MW/1500MWh independent energy storage power station in Bulgaria, designed, integrated, and delivered by COSPOWERS, has been successfully completed. This milestone not only marks a significant step in the implementation of COSPOWERS's globalization strategy in the European market but also serves as a testament to the strength of China's large-scale energy storage system solutions in Eastern Europe's energy infrastructure sector. The success of this project demonstrates that COSPOWERS has developed a complete closed-loop capability—from core products to complex project delivery—offering a reliable Chinese solution for the global energy transition.

1. The Hardcore Foundation: 5MWh Liquid-Cooled Energy Storage System, Setting New Standards for Safety and Efficiency

At the heart of the project is COSPOWERS's independently developed 5MWh liquid-cooled containerized energy storage system, which has obtained full European and American certifications including IEC and UL, establishing a solid foundation for the project's long-term stable operation.

High Energy Density, Cost Reduction and Efficiency Improvement: With a single-container capacity of 5MWh, the system's energy density per unit footprint significantly outperforms the industry average, reducing land and infrastructure costs by over 20%, delivering higher per-station investment returns for the client.

Fully Self-Developed, Safe and Controllable: Full-chain independent R&D—from cells, BMS (Battery Management System), PCS (Power Conversion System), to EMS (Energy Management System)—enables deep system-level synergy and precise control, fundamentally ensuring safety throughout the entire lifecycle.

Intelligent Temperature Control, Efficient Operation: Adopting intelligent liquid-cooling temperature control technology ensures that cells operate within an optimal temperature range, with temperature differentials controlled within 3°C, effectively extending battery life and ensuring efficient, stable output under Bulgaria's complex climatic conditions.

2. Delivery Excellence: Cross-Continental Precision Coordination, Delivering "China Speed" and "China Quality"

Facing Europe's complex supply chains, stringent grid-connection standards, and tight schedules, COSPOWERS demonstrated exceptional "end-to-end" project delivery capabilities.

Digitalized Full-Process Management: Leveraging a digital project management platform, the company achieved full-process visualization and traceability—from order placement, production, testing, and international logistics to on-site installation and commissioning—ensuring precision at every step.

Overcoming Cross-Border Delivery Challenges: In the face of international logistics hurdles, the project team developed multiple contingency plans in advance, coordinated global shipping resources, and overcame uncertainties such as port congestion, ensuring that hundreds of containers of equipment arrived on schedule and undamaged.

Efficient Local Execution: Close collaboration between Chinese and Bulgarian engineering teams on-site bridged cultural and technical standard differences, enabling high-quality completion of all equipment installation, commissioning, and grid-connection tests within the contract period, earning high recognition from the client for "Kunyu efficiency."

3. Value Realization: A Commercial Closed Loop from Power Equipment to Premium Energy Assets

This power station is not merely a technological project but also a carefully calculated premium energy asset with a clear business model and bright profit prospects.

Strong Revenue Generation Capability: The project primarily participates in Europe's primary frequency control (FCR) and electricity spot market arbitrage. Based on operational data modeling, at an effective annual cycle count of 531 cycles, the project is projected to achieve an EBITDA margin as high as 84.5%, demonstrating the strong profitability potential of large-scale energy storage in mature electricity markets.

Stable Grid Value: As Bulgaria's largest independent energy storage power station to date, its 300MW/1500MWh regulation capacity acts as a massive "grid stabilizer" and "power sponge," significantly enhancing the regional grid's ability to absorb renewable energy fluctuations and ensuring operational safety.

Long-Term Operation Support: COSPOWERS provides a long-term service agreement covering remote monitoring, preventive maintenance, rapid response, and spare parts support, committing to a system availability rate of no less than 95% throughout the lifecycle, safeguarding the asset's long-term, stable returns.

The success of the 300MW/1500MWh project in Bulgaria is a vivid demonstration of COSPOWERS's philosophy of "Technology-Driven, Global Service." It proves to the world that Chinese energy storage enterprises bring not only advanced products but also systematic value encompassing cutting-edge technology, complex project delivery, and long-term asset management.

Looking ahead, COSPOWERS will continue to leverage its full-stack self-developed core strength and global delivery network to deeply participate in the worldwide energy structure transformation, consistently contributing to a cleaner, more efficient, and more secure future energy system.