Recently, HuaDe Hydrogen Energy delivered its HYESS-C5 commercial-grade hydrogen-electric energy storage system to a client, supporting their hydrogen-electricity coupling demonstration project and establishing a proven case study for long-duration hydrogen-based energy storage grounded in the "Power-to-Hydrogen-to-Power (P2G2P)" cycle.

Figure 1: Product Shipment

The HYESS-C5 commercial hydrogen-electric energy storage system delivered by HuaDe Hydrogen Energy effectively combines PEM hydrogen generation, a fuel cell combined heat and power (CHP) system, and a high-pressure hydrogen storage system. Through a modular design, the entire assembly is highly integrated into a standard 20-foot container, facilitating convenient transportation and installation. The system primarily integrates a 5 Nm³/h PEM water electrolysis hydrogen generation unit, sixteen 40-liter hydrogen storage tanks, a 5 kW PEM hydrogen fuel cell, and associated auxiliary equipment.
Furthermore, the HYESS series commercial hydrogen-electric energy storage system delivered on this occasion features the following technical characteristics:

(1) Modular Design with High Integration
The system is divided into three sections: a hydrogen generation compartment, a hydrogen storage compartment, and a fuel cell compartment. While maintaining the standard container dimensions, the system can be effectively scaled up to a maximum capacity of 20 Nm³/h for hydrogen generation, 100 kW for fuel cell output, and 20 kg (@ 20 MPa) for hydrogen storage.

(2) Integrated, Independently Developed PEM Hydrogen Generation System
The system is equipped with a PEM-type electrolyzer featuring a dynamic hydrogen generation range of 20–120%, a dew point below -75°C, and an average energy consumption of 4.4 kWh/Nm³ H₂. The system design, integration, and commissioning were entirely executed in-house by the company.

Figure 2: Debugging the PEM Water Electrolysis Hydrogen Production Module

(3) Mature Fuel Cell Combined Heat and Power (CHP) System
The system featured in this project is the company's most mature model: the CARNEU-5—a compact, pure-hydrogen fuel cell combined heat and power system. Since its productization and market launch in 2022, the CARNEU-5 pure-hydrogen CHP system has garnered significant attention from numerous clients, resulting in a steady influx of orders from both domestic and international markets. Furthermore, its higher-power derivative models—the CARNEU-50, CARNEU-70, CARNEU-100, and CARNEU-300—have all successfully reached project delivery milestones.

(4) Fire Safety and Explosion-Proof Design
The system incorporates extensive explosion-proof safety features, with its layout strictly demarcated into hydrogen-handling zones and non-hydrogen zones. The hydrogen-handling zones utilize explosion-proof electrical components, while the non-hydrogen zones employ a positive-pressure explosion-protection design. Additionally, the system is equipped with a comprehensive suite of protective mechanisms, including hydrogen leak detection alarms, smoke detectors, over-temperature alerts, and video surveillance capabilities.

Figure 3: Fire Sprinkler Equipment in Hydrogen-Involved Areas

Figure 4: Selected Explosion-Proof Electrical Components in Hydrogen-Involved Areas

(5) Integrated Smart Energy Management System
By integrating the control of hydrogen production, filling, and fuel cell combined heat and power (CHP) generation, the system not only enhances coordination among its various modules but also simplifies the control architecture and reduces costs. Furthermore, the control system supports functions such as remote monitoring, remote start-up and shut-down, and power regulation.

Figure 4: Physical Appearance of the HYESS-C5 Commercial Hydrogen-Electric Energy Storage System

With the delivery of the HYESS-C5 commercial hydrogen-electric energy storage system, and guided by the HYESS series' design philosophy—characterized by high integration and rigorous safety standards—the company is poised to commence the phased delivery of multiple HYESS series systems. These systems are tailored to meet diverse client requirements regarding hydrogen production, fuel cell power generation capacity, and various hydrogen storage technologies (including solid-state and high-pressure storage solutions).

Figure 6: Design Diagram of the HYESS Series Commercial Hydrogen-Electric Energy Storage System

As global attention on renewable energy and energy storage continues to rise, hydrogen storage has increasingly become a focal point for nations worldwide, demonstrating distinct advantages—particularly in long-duration energy storage applications. According to the company's calculations, for storage durations exceeding eight hours, hydrogen-based storage already exhibits a cost advantage compared to lithium-ion battery storage systems. Within China, governments across various regions are actively responding to national policies by vigorously supporting the diversified development of the hydrogen energy industry, fostering an era of unprecedented prosperity. Against this industry backdrop, the shipment and delivery of the HYESS-C5 commercial-grade hydrogen-electric energy storage system mark yet another breakthrough for Huade Hydrogen Energy in terms of corporate transformation and technological advancement. This milestone successfully realizes the company's strategic objective of pursuing a "dual-track" approach—integrating both natural gas reforming (grey hydrogen) and PEM water electrolysis (green hydrogen) production methods—thereby reinforcing its capability to provide clients with flexible and diverse hydrogen energy solutions.

Hydrogen energy is only just beginning to take center stage in the realm of energy storage. Moving forward, the company will continue to dedicate substantial R&D resources to developing innovative hydrogen energy products and technologies, thereby creating new possibilities for the global energy transition and green development. In doing so, we remain steadfast in fulfilling our corporate mission: "Hydrogen-Electric Coupling, A Zero-Carbon Future."