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Greg Stark

Researcher V-Electrical Engineering

Orcid ID

Greg Stark is the hydropower technical lead at NREL. As a part of this role, he leads the Water Power Technologies Office's Operations and Planning research area for their new HydroWIRES initiative (U.S. Department of Energy).

Stark has more than 17 publications in peer-reviewed journals and conference proceedings, and he has participated in the planning of numerous conferences. Prior to NREL, Stark was a principal at Building Synergies, LLC, a firm specializing in high-performance building simulation. While there, Stark developed the first CAD-based building energy modeling tool for Macintosh computers.

Research Interests

Stark's research interests include the optimization of energy use across multi-domain systems (e.g., water and electricity) and integrating new generation into existing electrical grids, approaching both subjects from a combined systems engineering, finance, and economics perspective. His work has involved the design, development, and use of large-scale energy storage to make use of large amounts of renewable energy possible.


MBA, Human Resources Management and Services, Purdue University

M.Sc., Electrical Engineering, Purdue University

B.Sc., Chemical Engineering, Purdue University

Featured Work

The Role of Hydropower Flexibility in Integrating Renewables in a Low-Carbon Grid, NREL Technical Report (2023)

Storage Effectiveness in Enabling Variable Generation and Avoiding Fossil Emissions, NREL Technical Report (2023)

Understanding the Grid Value Proposition of Marine Energy: A Literature Review, NREL Technical Report (2019)

Net Revenue and Downstream Flow Impact Trade-Offs for a Network of Small-Scale Hydropower Facilities in California, Environmental Research Communications (2019)

Analysis on the Influence of an Energy Storage System and its Impact to the Grid for a Wave Energy Converter, ASME Journal (2019)

Modeling the Value of Networked, Small-Hydro Generators for Storage and Dispatch Capability on the Grid: Cooperative Research and Development Final Report, NREL Technical Report (2019)

Market Opportunities and Challenges for Pumped Hydro in an Evolving Power Grid, HydroVision (2018)

Integrated Energy Planning with a High Share of Variable Renewable Energy Sources for a Caribbean Island, Energies (2018)

Transforming the U.S. Market with a New Application of Ternary-Type Pumped-Storage Hydropower Technology, HydroVision (2018)

The Economic Potential of Nuclear-Renewable Hybrid Energy Systems Producing Hydrogen, NREL Technical Report (2017)