Open-Source Release of EPRI's REGEN Energy Systems Model

[John Bistline]

Dear all,

We are excited to announce the open-source release of EPRI’s US-REGEN (U.S. Regional Economy, Greenhouse Gas, and Energy) model, which is available at: https://github.com/epri-dev/US-REGEN

REGEN is a detailed and flexible energy systems modeling platform designed to explore a wide range of long-term scenarios. It draws on decades of EPRI research in technology assessment, policy analysis, energy-economic modeling, and company planning. This open-source release includes the electric sector capacity planning and fuels supply modules with extensive documentation, which was recently updated. End-use scenarios are provided as energy demand inputs, allowing economy-wide analysis.

The model is widely cited across academic, research, industry, and policy communities for its rigorous treatment of complex modeling areas, including:

• Renewables and energy storage
• State and federal policies, including recent Science articles on EPA’s power plant rules and the Inflation Reduction Act
• Electrification
• Low-carbon fuel pathways

Thanks to our Openmod colleagues for their encouragement and support for this effort. We encourage others to explore the code, run scenarios, adapt the model for new applications, and join a growing community working toward more affordable, reliable, and sustainable energy futures.

To learn more, explore the user manual and recent peer-reviewed publications on the US-REGEN site, or check out the introductory slide deck. Feel free to reach out with questions.

EPRI issued a press release here.

Best,
John