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Compressed Air Energy Storage (CAES)
Pioneering the industry with megawatt-to-gigawatt-scale CAES power station capabilities, we provide full-lifecycle services covering project development, process engineering, equipment manufacturing, system integration, EPC delivery, and operation & maintenance.
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Green Hydrogen
Delivering integrated “Power Generation – Hydrogen Production – Hydrogen Utilization” solutions.
We address key challenges in off-grid hydrogen safety and economics, enabling deep coupling between renewable energy and green chemical industries, and supporting cost reduction, efficiency improvement, and deep decarbonization across the full lifecycle.
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Power Electronics
With strong expertise in power electronics, we provide hydrogen power supply systems, high-voltage variable frequency soft starters, reactive power compensation systems (HV/LV), and grid connection equipment—widely applied in renewable integration and power quality management.
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# # Compressed Air Energy Storage (CAES)
# # Green Hydrogen
# # Power Electronics
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Core Technology | Global Leadership
HUASAI Energy is a leading company in compressed air energy storage and renewable hydrogen systems, dedicated to delivering end-to-end, full-value-chain solutions for energy companies, grid operators, high energy-consuming industries, and diversified stakeholders.
We cover process R&D, equipment development, system integration, EPC delivery, operation & maintenance.
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10 GW
CAES projects under development and in pipeline
5 World-First Projects
Proven experience in multiple global first-of-a-kind CAES projects, and the only company with four generations of full power plant iteration and real operational data
65 %+ Efficiency
Industry-leading system round-trip efficiency
10000 -ton Scale
China’s first large-scale green hydrogen demonstration project powered by renewable energy
Project Outcomes
Compressed Air Energy Storage
Green Hydrogen
Power Electronics
Jiangsu Salt Cavern CAES National Demonstration Power Station Project
The world's first commercially operating non-supplementary CAES power station
  • Charging time: 8 hours
  • Discharge time: 5 hours
  • Storage pressure: 14.5 MPa
  • Storage volume: 224,000 m³
60MW/300MWh
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Inner Mongolia Huade CAES and Key Equipment R&D and Application Demonstration Project
The world's first alpine, wide-sliding-pressure CAES power station
  • Charging time: 8 hours
  • Discharge time: 4 hours
  • Above-ground pressure vessel: 8,600 m³, sufficient for 1 hour of power generation
  • Underground chamber: 30,000 m³, sufficient for 3 hours of power generation
60MW/240MWh
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Inner Mongolia Sonid Left Banner Compressed Air Energy Storage Demonstration Project
It was included in Inner Mongolia's first batch of new energy storage demonstration projects
  • Charging time: 6.5 hours
  • Run time: 4 hours
100MW/400MWh
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Inner Mongolia Ulanqab Zhuozi County Compressed Air Energy Storage Demonstration Project
The world's largest compressed air energy storage project
  • Charging time: 8 hours
  • Discharge time: 6 hours
  • Storage pressure: 16.5 MPa
1050MW/6300MWh
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Inner Mongolia Etuoke Banner 5MW Off-grid Hydrogen Production Demonstration Project
China's first MW-scale off-grid PV-to-hydrogen demonstration project with direct DC couplings
  • 0 Grid Power, 0 Energy Storage, 100% Green Hydrogen Production
  • DC/DC converter operates with power tracking to maximize PV utilization
  • Wide-range gas-liquid separation tailored to the characteristics of off-grid PV systems
  • Intelligent optimization and flexible control for off-grid PV scenarios
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Inner Mongolia Etuoke Banner 500MW Grid-connected Hydrogen Production Demonstration Project
Inner Mongolia Phase II Wind/Solar-Hydrogen Production Demonstration Project
  • Adopting large-scale electrolysis-based hydrogen production and group-controlled hydrogen storage technology.
  • Achieving high-efficiency operation of the integrated hydrogen production and storage system; implementing an integrated solution where “green hydrogen absorbs green electricity and green ammonia absorbs green hydrogen”; and establishing a full industrial chain encompassing green electricity, green hydrogen, and green ammonia.
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Inner Mongolia Zhungeer Banner Narisong 400MW Photovoltaic Hydrogen Demonstration Project
China's first 10,000-ton scale green hydrogen flagship project, commissioned in late 2023
  • The project’s average annual electricity generation is approximately 740 million kilowatt-hours. Of this, 20% will be fed directly into the local grid,while the remaining 80% will be used for green hydrogen production.
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Panzhihua Iron and Steel Group Electric Arc Furnace Comprehensive Improvement Project
High-Voltage Dynamic Reactive Power Compensation Device
  • Voltage fluctuations reduced from 15% to 3%
  • Long-duration flicker on the 35 kV busbar reduced from 3.3% to 0.56%
  • Three-phase voltage imbalance reduced from 3.5% to 0.5%
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Hebei Construction Investment Group's Off-Grid Wind Power Hydrogen Production Project
Hydrogen Production Power Supply
  • Efficiency ≥ 0.97
  • Dynamic response time < 100 ms
  • Output current ripple ≤ 1% of Ipp
  • DC voltage adjustment range: 0–484 V
  • DC current adjustment range: 0–2310 A
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Huaguang Huaneng's 2023 Project on Key Technologies for the Construction of Industrial Green Microgrids
Flexible Interconnection Device
  • Maximum conversion efficiency ≥ 0.99
  • Power regulation response time < 5 ms
  • Total harmonic distortion (THDi) ≤ 3%
  • Voltage deviation ≤ 1%
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Three Gorges Energy's Project for the Development and Demonstration of Large-Scale Compressed Air Energy Storage Systems and Key Equipment
High-Voltage Variable Frequency Soft Starter
  • Rated load conversion efficiency > 0.97
  • Grid-side rated power factor > 0.99
  • Response time < 5 ms
  • Speed control range: 10%–100%
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Fangda Special Steel AV50 Mill: Project to Convert the Steam-Driven System to an Electric-Driven, Electronically Controlled System
Complete Equipment Sets
  • Main busbar rated current up to 5000 A
  • Short-circuit current up to 40 kA
  • Capable of withstanding high current surges and frequent load fluctuations
  • Excellent short-circuit withstand capability
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