Why NEMS
U.S. Gold Standard for Energy Economic Modeling
What is NEMS?
The National Energy Modeling System (NEMS) is one of the most comprehensive energy system models used to evaluate long-term energy policies and market dynamics in the United States.
Developed and maintained by the U.S. Energy Information Administration, NEMS is used to produce the Annual Energy Outlook and inform major policy and infrastructure decisions.
Read more about real-world uses of NEMS in our NEMS in Practice brochure.
NEMS Matters
NEMS integrates multiple sectors of the energy system including:
- electricity generation
- fuels markets
- technology adoption
- macroeconomic impacts
The integrated structure allows researchers to explore complex questions about energy transitions, economic outcomes, and policy impacts.
The Access Gap
Despite its importance, NEMS remains difficult to use outside specialized contexts. Barriers include:
- steep learning curves for researchers
- technical complexity
- limited documentation for new users
The Solution: NEMS Connect
