DOE Long-Duration Energy Storage Workshop

March 9-10, 2021


“BIG” Energy Storage:
Priorities and Pathways to Long-Duration Energy Storage


Hosted by:



Join us for an interactive workshop!

  • This workshop will define the unique challenges of “BIG” (large capacity (>100 MWe) and long-duration (>6 hours) energy storage for grid applications, increase awareness in the energy storage community, and identify needs and gaps that must be addressed to realize the capability.
  • The workshop will bring together researchers, representatives, and energy-storage stakeholders from utilities, industry (U.S. Domestic and International), U.S. Department of Energy, state and local government, national laboratories, and universities.
  • The outcome of this workshop will be a summary of needs and gaps (scale and duration), use cases, potential technologies, and a framework for implementation through initiatives such as the U.S. DOE Energy Storage Grand Challenge.
  • NEW! Want to get primed for the workshop? Please read our recently prepared Issue Brief on Long-Duration Storage


Video Recordings

Video Recordings of the Workshop are Available! Workshop Registrants and Attendees should have received an email with links and passwords to access the recorded content, including participant lists and the active chat! If you were not able to register for the meeting please contact Erik Spoerke ( for access to workshop content.


Interested in virtual video tours of the technologies discussed in the workshop?


Interested in highlighting your work with the long-duration storage community?



“BIG” Energy Storage Agenda

Download PDF of the agenda here.


Tuesday, March 9: Defining the Long Duration Energy Storage Challenge

Time Presenter Organization Topic
11:00 – 11:10am Erik Spoerke Sandia National Laboratories Welcome and Outline of Workshop
11:10 – 11:30am Dr. Imre Gyuk U.S. DOE, Director of Energy Storage Research, Office of Electricity Keynote Address
11:30am – 12:40pm Panel 1: What is Long-Duration Energy Storage? Defining LDES Through Need (Moderator: Dr. Imre Gyuk)
Mike Gravely California Energy Commission
Scott Egbert New York State Energy Research and Development Authority
King Look Con Edison
Todd Olinsky-Paul Clean Energy Storage Alliance
Ryan Stephens Shell
David Howell DOE Vehicle Technologies Office
12:40 – 12:50pm Break (with Fun Trivia, Polls, and Quizzes!)
12:50-1:20pm A Conversation about Policy (Moderator: Rebecca O’Neil, Program Manager, Pacific Northwest National Laboratory)
Erin Childs Strategen
Rose Anderson Oregon Public Utilities Commission
Debbie Mursch General Electric Renewable Energy
Vladimir Koritarov Argonne National Laboratory ​
1:20 – 1:40pm Scott Litzelman U.S. DOE, Program Director, ARPA-E Keynote Address
1:40 – 2:50pm Panel 2: Economics and Valuation of Long Duration Energy Storage (Moderator: Scott Litzelman)
Paul Albertus University of Maryland
Marco Ferrara Form Energy
Max Tuttman U.S. DOE, ARPA-E
Paul Denholm National Renewable Energy Laboratory
Ali Amirali Starwood Energy Group
2:50 – 3:00pm Break (with Fun Trivia, Polls, and Quizzes!)
3:00 – 3:30pm Kelly Speakes-Backman U.S. DOE, Acting Assistant Secretary and Principal Deputy Assistant Secretary for the Office of Energy Efficiency and Renewable Energy Keynote Address
3:30 – 4:40pm Panel 3: Long Duration Energy Storage Use Cases: Energy Storage Grand Challenge and Beyond
(Moderator: Eric Hsieh, U.S. DOE, Office of Electricity and Technology Development Lead for the DOE Energy Storage Grand Challenge)
Abbas Akhil Former New Mexico State Representative
Carlos Reyes EcoElectrica
Kevin Peng Los Angeles Department of Water and Power
Sander Cohan Enel NA
Dmitry Kosterev Bonneville Power Administration
David Bianco/Imre Gyuk National Grid, Nantucket Island
4:40pm Erik Spoerke Sandia National Laboratories Closing Remarks and Open Discussion

Wednesday, March 10: Emerging Technical Solutions for Long-Duration Energy Storage

Time Presenter Organization Topic
11:00 – 11:10am Erik Spoerke Sandia National Laboratories Welcome and Outline of Day 2
11:10 – 11:25am Michael Pesin U.S. DOE, Deputy Assistant Secretary for Advanced Grid Research and Development Keynote Remarks
11:25am – 12:35pm Panel 4: Thermal Storage (Moderator: Clifford Ho, Sandia National Laboratories)
Bruce Kelly SolarDynamics Molten-Salt Thermal Storage
Maxwell Cameron-Jones Siemens-Gamesa Rock-Bed Thermal Storage
Zhiwen Ma National Renewable Energy Laboratory Moving Particle Packed Bed Thermal Storage
Ben Bollinger Malta Pumped Thermal Storage
Torbjörn Lindquist Azelio Molten Alloy Latent Heat Storage
Richard Riley Highview Liquid Air Latent Heat Storage
12:35 – 12:50pm Virtual Tours of Technologies/Systems I
12:50 – 1:00pm Break (with Fun Trivia, Polls, and Quizzes!)
1:00 – 2:10pm Panel 5: Mechanical and Gravity Storage (Moderator: Michael Starke, Oak Ridge National Laboratory)
Andrea Pedretti Energy Vault Stacked Block Energy Storage
Russ Weed ARES Advanced Rail Energy Storage
Jeremy Goodman Tennessee Valley Authority Pumped Hydro Storage
David Havard GE Renewable Energy Advanced Pumped Hydro
Joe Zhou Quidnet Subsurface Pumped Storage
2:10 – 2:25pm Virtual Tours of Technologies/Systems II
2:25 – 3:35pm Panel 6: Chemical, Hydrogen, and Fuels Storage (Moderator: Chris San Marchi, Sandia National Laboratories)
Neha Rustagi DOE Hydrogen and Fuel Cell Technologies Office Technical Gaps in Hydrogen Storage
Christian Sattler German Aerospace Center Solar Fuels
Thomas Autrey Pacific Northwest National Laboratory Liquid Organic Hydrogen Carriers
Ron Kent SoCalGas Hydrogen Storage
Noah Meeks Southern Company Services Hydrogen Storage
Anna Snider Lord Sandia National Laboratories Geologic Storage
3:35 – 3:45pm Break (with Fun Trivia, Polls, and Quizzes!)
3:45 – 4:00pm Virtual Tours of Technologies/Systems III
4:00 – 5:10pm Panel 7: Battery Storage (Moderator: Vince Sprenkle, Pacific Northwest National Laboratory)
Tomio Tamakoshi NGK Sodium-sulfur Batteries
Gary Yang UniEnergy Technologies Vanadium Redox Flow Batteries
Richard Brody Lockheed Martin Aqueous Redox Flow Batteries
David Bradwell Ambri Liquid Metal Batteries
Sanjoy Banerjee Urban Electric Power Zn-based Batteries
C. Michael Hoff Hoffpower Li-Ion Batteries
5:10 – 5:30pm Erik Spoerke Sandia National Laboratories Summary and Closing Remarks



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