Recently, the vanadium flow battery energy storage demonstration project jointly deployed in Bulgaria by ZH Energy and its European partners has been successfully put into operation. This project is a landmark innovative long - duration energy storage project in Bulgaria and the Eastern European region. Its successful operation strongly proves the company's comprehensive technical strength and the smooth progress of its internationalization strategy.

The vanadium flow battery energy storage demonstration project in Bulgaria has a rated power of 480kW and a total capacity of 3.84MWh, capable of continuous discharge for up to 8 hours. The system uses vanadium aqueous electrolyte, which is stored in dedicated electrolyte storage tanks. This demonstration project is designed for outdoor installation and can withstand the extreme weather conditions in Bulgaria (- 20°C to + 55°C). While ensuring absolute safety, it also provides excellent capacity management flexibility:

Intrinsic Safety with Zero Risk of Combustion and Explosion: The aqueous electrolyte completely avoids the risk of thermal runaway, providing the highest - level safety guarantee for industrial - grade applications. It can be equipped with photovoltaic + charging equipment to build an integrated photovoltaic energy storage and charging system, ensuring the stable operation of the power grid.

25 - Year Ultra - Long Life with Worry - Free Investment: The core electrochemical materials have almost zero attenuation and do not need to be replaced throughout the life cycle, significantly reducing the levelized cost of storage (LCOS) and bringing long - term stable returns to investors.

8 - hour Long - Duration Energy Storage with Flexible Expansion: The modular design and independent tank structure make it easy to expand the system's energy storage duration (capacity) by simply adding electrolyte storage tanks, meeting a variety of needs from grid peak - load shifting and frequency modulation, commercial and industrial backup power to large - scale renewable energy grid - connected consumption.

Intelligent Management and Excellent Performance:The system is equipped with the flow battery management system (BMS) and EMS platform independently developed by ZH Energy, realizing remote intelligent management of the project operation, reducing maintenance costs while ensuring the safe and reliable operation of the system.

All - weather Operation with No Fear of Challenges:Specifically designed for harsh environments, the system can operate stably in the temperature range of - 20°C to + 55°C, ensuring reliable power supply throughout the year in Bulgaria's diverse climates.

The successful operation of the Bulgarian cooperative project not only strongly supports ZH Energy's internationalization strategy, but also verifies the local application potential of vanadium flow battery technology in Eastern Europe. Based on the project verification results, the company has reached a strategic agreement with a European energy group, and the order scale in 2025 is expected to exceed 300MWh. In order to further deepen the European market layout, ZH Energy is planning to set up a R & D production center in Eastern Europe to build a "local production + local service" system, shorten the delivery cycle, reduce supply chain risks, and efficiently serve the zero - carbon energy transition in Europe. At the same time, the company will also expand international market cooperation in the Asia - Pacific, the Americas and other regions.

Taking the Bulgarian demonstration project as a strategic fulcrum, ZH Energy is accelerating its global expansion. Now, we sincerely invite global energy storage developers, energy groups and investment institutions to become strategic partners. Visit the Bulgarian project for inspection and discuss cooperation! Scan the QR code immediately to make an appointment or contact: （E-mail）info@z - henergy.com. We look forward to working with you to create a new chapter in energy storage!

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