2026.01.22

Note: We're switching to a different format of versioning. The new versions will follow the YYYY.MM.DD format

What's Changed

• Add monthly scheduled outages to ReEDS2PRAS
• Address mixed resolution issues
• Fix incorrect comment about PV units
• Add missing publications to documentation
• Remove unallowed vintages from valcap
• Use single-turbine unit size for gas-cc; add diagnostic plots for stress periods
• Use 15 weather years for RA by default
• Change this_year to 2025
• Fix H2-CC upgrade number in documentation
• Update copy files to only write empty file if it doesn't already exist
• Update link to Julia setup
• Updates to restart_runs.py and runstatus.py
• Option to dynamically update the PRM for stress periods
• Add option to adjust retirement for thermal plants
• Extend retirement dates for operating units
• Offshore Wind Mandate Update
• INV_ENERGY fixes for PCM runs
• Docs: Proofread
• Change relevant instances of NREL to NLR
• Add new gas plant types as technology options in ReEDS
• ci: Re-enabling r2x-reeds check
• Move h2_share calculation from b_inputs.gms to writecapdat.py
• Bokehpivot update
• Move r_cs file creation to input_processing
• Fix h2_ba_share export in writecapdat.py
• Remove region parameter from water_with_cons_rate.csv
• Add AEO 2025 demand projections
• Calculate regional H2 storage types in input processing
• Turning on start costs for combined cycle plants
• Documentation Updates
• Convert load profiles to state level and update historical load scaling and calibration
• Historic load bugfix
• Update supply curves to new reV grid cells
• Delete 140/220 AC UPV CF profiles
• Add CCS options for new H-frame combined cycle gas techs
• Remove CSP supply curve and profiles
• fixing typo in tech_map
• Add emission rate documentation

Known Issues

1. MonteCarlo scenario fails
2. Pacific_rep7 scenario fails
3. OR_water scenario fails

Compare Reports

results-2026_01_22_USA_defaults.v2025_7_0_USA_defaults.pptx

v2025.7.0

What's Changed

• Calculate historical capex using custom regions
• Add CAP_ENERGY to small numbers vars
• Remove the internal documentation
• Update NERC PRM values based on 2024 LTRA
• Update Pumped Storage Hydropower Supply Curves and Increase Default PSH Storage Duration
• Add offshore zones and transmission
• fixing math typo for h2-cc
• Fix geothermal cost accounting for spur lines and growth penalties
• Use zonal PRM [MW] as maximum new-unit size in ReEDS2PRAS
• Update gamspy_base version in environment.yml
• Reformat transmission representation for use with transmission upgrade supply curve
• Fix Inter‑Day Linkage for Standalone Storage (GSw_InterDayLinkage)
• [Hydro] Remove duplicate data from hydropower capacity factor input files
• Fix processing of hydcf files in copy_files.py
• Update environment.yml
• Turn off CSP by default
• Detrend historic load and add direct use to annual state load estimates for calibration
• Add and enforce more switch/file associations (supply curves, capacity factors, and water-related files)
• EER splice customization
• Update tax credit documentation
• Adding county-level cendivweights.csv file to blur fuel prices.
• Remove old transmission capacity future files

Known Issues

1. The Mid_Case scenario fails: setting GSw_GrowthAbsCon = 0 will allow the model to solve.

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results-v2025_6_0_USA_defaults.v2025_7_0_USA_defaults.pptx

v2025.6.0

What's Changed

• Monte Carlo Simulation Improvements and Updates
• Constraining county and mixed resolution transmission flows
• Documentation for MCS capabilities and plots
• Update Documentation w/ better county-level caveats.
• Add --dryrun option to runbatch.py; clean up casemaker.py
• small plotting bug fix
• Extended energy community bonus to include nuclear energy communities
• Add option to include H2 leakage in CO2e
• Replace reeds_region_tz_map.csv with postprocessing script
• Cache LFS Data on GitHub Runner
• Externalize Bokeh Functions - MCS Plots
• Add Plot Modules for Monte Carlo Simulations (MCS) in ReEDS
• update hydro data and outage rate rep for hydro
• Fixes README Image in Documentation
• Update Documentation
• Ignore EVMC files that are not required
• County transmission adjustment for removing initial RA issues.
• EER splice bugfix: handle different ira_con case names in hourlize vs. EER data
• Documentation Updates
• Update interconnection queue data (2025)
• Reimplement Beyond 2050 Functionality
• Modeling to Generate Alternatives (MGA): Initial framework
• Fix bug in switch/file handling + add more switch/file associations
• [Bug Fix] Fix FIPS Codes and Shrink Filesize of Hydro Capacity Factor Input Files
• Fix remove small number method
• FY25 NEMS database update
• Update and reformat interconnection costs
• Delete reeds_ba column from unit database and derive from county
• Update state policies
• Allow endyear to be earlier than 2025
• Use EER source files directly in eer_splice.py, rather than intermediate h5 files
• Add cost-optimal siting of flexible demand
• Remove extra call to e_report_dump.py
• Error Check Corrections

Compare Reports

results-v2025_6_0_USA_defaults,v2025_5_0_USA_defaults.pptx

Known Issues

1. USA_Mid_Case scenario fails due to an error with GSw_GrowthPenalties

v2025.5.1

Summary

This patch release fixes a metadata issue in the Zenodo integration.
A missing family_name field in the CITATION.cff file caused Zenodo to reject the v2025.1.0 release with the error:
Family name cannot be blank.

Changes

• Corrected CITATION.cff so that all creator entries are valid. PR #243.
• No code or functionality changes were made.

Notes

• This release exists only to regenerate a valid DOI on Zenodo.

v2025.5.0

What's Changed

• Don't Allow Concurrent Workflow Runs
• Pull request checklist
• Add 'incentives' scenarios to reflect tax credit updates from OBBBA
• Update Authors in CITATION.cff
• State policies update
• Add seaborn to ReEDS environment
• Add DR shed resource (back) to ReEDS Part 2
• Change Default Value of GSw_CCS_NoRetire and Update Switch Description
• quick fix for restart runs

Known Issues

1. OR Water scenario fails

Compare Reports

results-v2025_4_0_USA_defaults,v2025_5_0_USA_defaults.pptx
results-v2025_4_0_USA_decarb,v2025_5_0_USA_decarb.pptx

v2025.4.0

What's Changed

• Fix OR_water test scenario
• Debug BA and state-level maps in bokeh-pivot
• Enable 'No trade with Canada' (GSw_Canada=0)
• Turn off GSw_H2_SMR by default
• Documentation: Resource adequacy, temporal resolution, supply curves, formatting
• Adds a Publications page to the documentation
• Remove Discrete Batteries from ReEDS (2/2 of the PRs to replace ReEDS discrete-hour batteries with continuous-hour batteries)
• Fix cases_test add OR_water to the runner and improve RHS values
• Updating firm transfer limits based on actual historical interchanges between regions
• Add regional capital cost multipliers for missing counties
• Update the GAMS version in the documentation
• Documentation Update
• Update error message
• Fix Empty GSw_HourlyClusterAlgorithm in MCS by Applying Default
• removed rounding of battery duration in reeds2pras
• Update Publications Page
• Fix bug filtering stranded battery energy capacity when economic retirements are disabled
• Update EER load profiles
• Enabling H2CC powerplants and upgrades from gas-cc
• Automate Multiple Runs per Node in HPC
• Remove repeated ATB data - coal and NG
• Corrected application of VOM/FOM values for fossil plants
• Add DR shed resource (back) to ReEDS
• ReEDS2PRAS: Apply storage charge/discharge losses; add options for reducing memory use
• docs: Updating readme to include badges
• docs(readme): Fix line error on README.md
• Comms Review Documentation Updates
• Change regional cost multipliers to differences
• Reinstate 2023 EER profiles for archival purposes
• Run a partial BA at county resolution
• dsgrid_to_reeds documentation updates
• New valcap shrinkage fix
• Update Print Statement
• Rewrote 'Electricity Demand' section of model documentation
• Documentation updates

Known Issues

1. Pacific_pvb scenario fails in ldc_prep.py
2. OR_water scenario fails

Compare Reports

results-v2025_3_0_USA_defaults.v2025_4_0_USA_defaults.pptx
results-v2025_3_0_USA_decarb.v2025_4_0_USA_decarb.pptx

v2025.3.0

What's Changed

• Delete disagg_translinesize and references to translinesize
• Change license file to BSD 3-Clause license
• Split up conventional plant characteristics file
• Refactored disagg population/geosize inputs
• Add other GHG to CO2e
• Delete unnecessary files at the end of the run
• Turn on temperature-dependent forced outage rates by default, clipped to 40%
• Downscale H2 demand/storage inputs and delete pipeline_cost_mult.csv
• Remove DUPV files
• Resolve Upgrades Issue
• Fix incorrect disaggfunc causing empty hydcf.csv
• Fix interactive bokeh bug. Allow compatibility with Python 3.9
• Updating RGGI emissions
• Update online date for Terrapower Natrium plant
• EER load preprocessing and splicing
• Update to AEO 2025 Fuel Prices
• Hourlize load ingestion fix
• Switch to 3-hour chunks by default
• Bokehpivot efficiency improvements and revenue and stress timeslice generation outputs
• Addition of mean time to repair (MTTR) in ReEDS2PRAS
• adding github workflow for running hourlize tests
• Add Continuous Battery to ReEDS (1/2 of the PRs to replace ReEDS discrete-hour batteries with continuous-hour batteries)
• Increase the size of the final growth penalty bin
• Consolidate cases_test.csv and cases_github.csv
• Updating hydrogen production tax credit representation per final rules
• Remove the OR_water scenario from the GitHub runner
• Fixes for county-aggreg combination
• Add documentation for geothermal technology description
• Change reg_cap_cost_mult_default.csv to be at the county level
• Monte Carlo Simulation (MCS) Capability for ReEDS
• Add more representative day selection methods; add option to include offshore wind
• Fixing error in get_case_periods
• Update Cases Files
• Delete r_rr_adj_{lvl}.csv and replace with dynamic process
• Bulk update of 2016-2023 historic load profiles

Known Issues

1. Pacific_pvb scenario fails in ldc_prep.py
2. Regional capital cost multipliers are missing for some counties. County-level runs in regions that include RI, NY, CO, VA, or MO will fail.

Compare Reports

results-v2025_2_0_USA_decarb,v2025_3_0_USA_decarb.pptx
results-v2025_2_0_USA,v2025_3_0_USA_defaults.pptx

v2025.2.0

What's Changed

• Follow-up to weather year updates (temperature + load changes)
• bugfix: Create h_dt_szn_h17 hour column based on index
• Updated Canadian import/export data
• ci: Adding new R2X validation procedure
• Add option to rerun ReEDS in dispatch-only mode
• For cost_cap_fin_mult(i,r,t) modification, take the maximum of state-level and conus-wide natural gas capital recovery factor penalties instead of both
• Change NEUE threshold to 1 ppm; aggregate southern AZ into rest of AZ (132 zones total)
• Switch from seasonal to monthly resolution for scheduled outages
• Split up historic load scenario
• Converted forced_retirements.csv to state-level input
• Docs: Transmission, formatting, figure organization, readme
• Combined regionally banned techs into one .yaml file input
• Remove Demand Response
• Updated 2016-2023 load data and pras/stress periods bugfix
• Fix missing assignment of user-defined operating reserve periods
• Update hydro data & split county-ba
• Created initial file-switch associations in runfiles.csv
• Update land-based wind supply curve with reV bug fix to capacity factors

Known Issues

1. Pacific_water scenario fails
2. Pacific_pvb scenario fails
3. Pacific_2020 scenario fails in copy_files

Compare Reports

results-v2025_1_0_USA.v2025_2_0_USA.pptx
results-v2025_1_0_USA_decarb.v2025_2_0_USA_decarb.pptx

v2025.1.0

What's Changed

• Add switch to turn off wind/solar carveouts by default
• Documentation Updates
• Correct resource and load profile mislabeling and move all inputs and outputs to central standard time.
• Update inflation and output dollar year for 2024
• R2r precise clean
• Bokeh ldc_prep fix bug
• Update depth cutoff for EGS supply curves to 6.5km
• Retail Rate Module DAC capex Distribution and Mean Bias Error Updates
• Improve copy_files.py organization
• Added 2016-2023 data to historic_load_hourly.h5
• Update hourlize with new VRE profile format
• Bugfix for runs with no CSP
• Ensure Minimum Supply Curve Capacity Meets Prescribed Requirements
• Fix missing paths and improve get_regions_and_agglevel in copy_files.py
• Updating hourlize inputs with new geothermal supply curve file headers
• Add new weather years-OSW
• Adjust DE carbon cap trajectory
• Fix Julia issue with GitHub runner
• Diagnose A Matrix
• Add UPV profiles for new weather years
• Added functionality for new weather years in resource/load data
• Land-based wind supply curve update with new weather years
• feat(runbatch.py): Fail fast if core programs are missing on the environment
• Add Inter-day Linkage to Long Duration Energy Storage using Sparse Chronology Method
• MinGen Infeasibility
• Dynamic Start Year (PR-1)
• Updated cspcf to use df_upv index when CSP is disabled
• Adjust cf_improvement for advanced and conservative UPV scenarios
• Added new distPV CF profiles from reV
• Add mixed spatial resolution capability
• ReEDS2PRAS: Include hydro energy budget
• Update nuclear demonstration plants
• Organize shared functions

Known Issues

1. Pacific_water scenario fails
2. Pacific_pvb scenario fails

Compare Reports

results-v2025_1_0_USA,v2025_0_0_USA.pptx
results-v2025_1_0_USA_decarb,v2025_0_0_USA_decarb.pptx

v2025.0.0

What's Changed

• Bug fixes
• Hydropower, PSH, and cooling water documentation updates
• Fix BA cost reporting in bokeh (resolves #1557)
• Check to make sure input parameters are populated
• Write outputs.h5 and use it for post-run plots
• Turn Cofire Off By Default
• Don't enforce offshore wind mandates until RPS start year
• Update regional capital cost multipliers
• Fix to agg3 and remove 'state' option from GSw_RegionResolution

Known Issues

1. USA & USA_decarb: run and produce outputs, has an error in retail_rate_calcuations.py
2. Pacific_water scenario fails
3. Pacific_pvb scenario fails

Compare Reports

results-v2025_0_0_USA_decarb,v2024_8_0_USA_decarb.pptx
results-v2025_0_0_USA,v2024_8_0_USA.pptx