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SustainX Inc.

Isothermal Compressed Air Energy Storage


SustainX is developing and demonstrating a modular, market-ready energy storage system that uses compressed air as the storage medium. SustainX uses a crankshaft-based drivetrain to convert electrical energy into potential energy stored as compressed air. SustainX’s ICAES system captures the heat from compression in water and stores the captured heat until it is needed again for expansion. Storing the captured heat eliminates the need for a gas combustion turbine and improves efficiency. SustainX achieves isothermal cycling by combining patented innovations with a design based on mature industrial components and principles. The system is designed for a 20-year lifetime. It achieves full power output from start-up in less than one minute, and it does not use toxic chemicals.

Contact Information

Ronald Staubly
Project Manager
National Energy Technology Laboratory
3610 Collins Ferry Road
Morgantown, WV 26507-0880

Benjamin Bollinger
Principal Investigator
SustainX Inc
72 Stard Rd. Seabrook, NH 03874

Recipient: SustainX Inc.
HQ State: New Hampshire
NERC Region:
Total Budget: $13,046,588
Federal Share: $5,396,023
Funding Program:
Project Type:
Targeted Benefits:
  • Substitutes for transmission and distribution upgrades
  • Supports the delivery of variable renewables
  • Maintains the stability of the grid
  • Reduces the need for gas-fired peaker units
  • Increases grid efficiency through new grid managements strategies
  • Reduces greenhouse gas emissions
  • Reduces electricity costs
  • Uses no toxic chemicals

The Department of Energy's Office of Electricity (OE) recognizes that our nation's sustained economic prosperity, quality of life, and global competitiveness depends on an abundance of secure, reliable, and affordable energy resources. OE leads the Department of Energy's efforts to ensure a resilient, and flexible electricity system in the United States. Learn more about OE >>

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