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Illinois Energy Policy Simulator

The Illinois Energy Policy Simulator (EPS) is a free and open-source computer model created by Energy Innovation LLC and RMI. It is adapted from software originally created by Energy Innovation LLC.

Model Download​

The Illinois Energy Policy Simulator may be used on this website through your web browser, or the full version may be downloaded to your computer by clicking the button below. Note that you will need to go through the steps explained on the EPS download page in order to install the required software and make use of the downloadable version of the model.

Download the Illinois Energy Policy Simulator

Click here for access to the previous version of the public model, including access to saved scenarios.

U.S. State EPS Methodology​

The U.S. State EPS Methodology page details our basic modeling assumptions, data sources, and methodology by sector. Additionally, we include information on the business-as-usual (BAU) and nationally determined contribution (NDC) scenario assumptions.

Acknowledgement of Contributors and Reviewers​

We would like to acknowledge the following people who made the U.S. State Energy Policy Simulators possible.

  • Ashna Aggarwal, RMI
  • Olivia Ashmoore, Energy Innovation LLC
  • Kyle Clark-Sutton, RMI
  • Nathan Iyer, RMI
  • Megan Mahajan, Energy Innovation LLC
  • Robbie Orvis, Energy Innovation LLC

Version History​

4.0.2 - September 17, 2024​

  • Updated to 4.0.2 EPS model platform
  • Data Updates
    • Updated BAU to reflect components of the Inflation Reduction Act and latest EPA rules (see documentation)
    • Updated input data to the latest available version from data sources, including the U.S. Energy Information Administration and the U.S. Environmental Protection Agency

3.4.3.3 - June 9, 2023​

  • Bug fix
    • Prevent rare Vensim error caused by negative ppriority values in ALLOCATE AVAILABLE function

3.4.3.2 - May 19, 2023​

  • Bug fix
    • Allow changes in capacity construction subsidies to affect electricity prices

3.4.3.1 - February 6, 2023​

  • Official launch of the U.S. State Energy Policy Simulators

Software License​

The Energy Policy Simulator (EPS) is released under the GNU General Public License version 3 (GPLv3) or any later version and is free and open-source software. Refer to the Software License page for full details.

Image Credits​

City architecture and skyscrapers near waterfront
Pedro Lastra
https://unsplash.com/photos/Nyvq2juw4_o
License: Unsplash License
Changes: Image has been cropped and a fade has been applied to the left side.