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Views: 200 Author: Site Editor Publish Time: 2025-07-24 Origin: Site
Sanhe Power Tech Contributes to World’s Largest Single-Unit Seawater Electrolysis Hydrogen Production System
A seawater-to-hydrogen demonstration project at a major coastal power plant in southern China represents a world-first achievement: the largest single-unit seawater electrolysis hydrogen production system globally, with a rated capacity of 500 kW and a hydrogen output of 100 Nm³/h.
This demonstration project, which began installation and commissioning in November 2023, is now successfully operating at full capacity. It validates seawater electrolysis as a scalable, cost-effective pathway for harnessing marine renewable energy.
As a key equipment supplier, Sanhe Power Tech provided three core components for the project, all housed within the containerized system:
Equipment | Quantity | Function |
|---|---|---|
Distribution Control Cabinets | 2 sets | Equipped with variable frequency drives (VFDs) to control startup and operation of various pumps in the hydrogen production process |
Hydrogen Production Rectifier Power Cabinets | 3 sets | Provide DC power to the electrolysis cells (60V, 4,500A per unit) with liquid cooling technology |
Power Quality Management Cabinet | 1 set | Integrates harmonic filtering, reactive power compensation, and three-phase imbalance correction to ensure grid compliance |
As of mid-2024, real-time monitoring data showed:
DC Output: 50V / 3,000A
Hydrogen Production Rate: 105 Nm³/h (exceeding the rated 100 Nm³/h)
The system’s hydrogen output has consistently surpassed the designed capacity, demonstrating excellent performance and stability.
Power Quality Performance
After commissioning, all power quality parameters — including harmonics, reactive power, and three-phase balance — were brought into full compliance with national grid standards, ensuring reliable and efficient hydrogen production.
Containerized, integrated design for easy transport and installation
Liquid-cooled rectifier cabinets for high-power, continuous operation
Real-time monitoring and control via centralized SCADA interface
This project demonstrates that seawater electrolysis can be a technically viable and economically attractive solution for large-scale, low-cost green hydrogen production — especially relevant for coastal regions and islands with abundant renewable energy resources.
Sanhe Power Tech is proud to support this pioneering initiative and remains committed to advancing critical power electronics and power quality technologies for the global energy transition.
Sanhe Power Tech （Shenzhen） Co., Ltd.
+86 13418990147
yvonne.zhang@samwha-cn.com
