Repositories list

• GEOPHIRES-X

  Public
  GEOPHIRES is NREL's free and open-source geothermal techno-economic simulator.

  Python

  •

  MIT License

  •4141 forks•6060 stars•7979 issues•11 pull request•Updated May 30, 2026May 30, 2026

• sparkctl

  Public
  Orchestrates Spark clusters on HPCs

  sparkhpccluster+ 1

  sparkhpcclusterslurm

  Python

  •

  BSD 3-Clause "New" or "Revised" License

  •11 fork•22 stars•22 issues•22 pull requests•Updated May 30, 2026May 30, 2026

• REopt.jl

  Public
  Julia

  •

  Apache License 2.0

  •4747 forks•4545 stars•9494 issues•4444 pull requests•Updated May 30, 2026May 30, 2026

• COMPASS

  Public
  INFRA-COMPASS is a tool that leverages Large Language Models (LLMs) to create and maintain an inventory of state and local codes and ordinances applicable to en…

  infrastructureautomationai+ 6

  infrastructureautomationaipermittingenergy-analysisordinancessitingenergy-policyllm

  Python

  •

  BSD 3-Clause "New" or "Revised" License

  •55 forks•1818 stars•8383 issues•66 pull requests•Updated May 30, 2026May 30, 2026

• bifacial_radiance

  Public
  Toolkit for working with RADIANCE for the ray-trace modeling of Bifacial Photovoltaics

  guiradiancerenewable-energy+ 3

  guiradiancerenewable-energyrenewablesphotovoltaicsbifacial

  HTML

  •

  BSD 3-Clause "New" or "Revised" License

  •5656 forks•104104 stars•8484 issues•22 pull requests•Updated May 30, 2026May 30, 2026

• elm

  Public
  ELM is a collection of utilities to apply Large Language Models (LLMs) to energy research.

  energy-datarenewable-energyenergy-policy+ 2

  energy-datarenewable-energyenergy-policylarge-language-modelsllm

  Python

  •

  BSD 3-Clause "New" or "Revised" License

  •2424 forks•6969 stars•11 issue•11 pull request•Updated May 30, 2026May 30, 2026

• r2x-sienna

  Public
  Python

  •

  BSD 3-Clause "New" or "Revised" License

  •00 forks•00 stars•00 issues•22 pull requests•Updated May 30, 2026May 30, 2026

• r2x-reeds

  Public
  Reeds parser and models

  reedsr2x-core

  reedsr2x-core

  Python

  •

  BSD 3-Clause "New" or "Revised" License

  •22 forks•22 stars•44 issues•88 pull requests•Updated May 30, 2026May 30, 2026

• developer.nlr.gov

  Public
  An issue tracker for NREL's APIs available at https://developer.nrel.gov

  HTML

  •5656 forks•5858 stars•1818 issues•33 pull requests•Updated May 30, 2026May 30, 2026

• OpenStudio-HPXML

  Public
  Modeling of residential buildings in EnergyPlus using OpenStudio/HPXML.

  Ruby

  •

  Other

  •2626 forks•6666 stars•126126 issues•2323 pull requests•Updated May 29, 2026May 29, 2026

• bambam

  Public
  The Behavior and Advanced Mobility Big Access Model

  accessibilitygeospatial-analysis

  accessibilitygeospatial-analysis

  Rust

  •

  BSD 3-Clause "New" or "Revised" License

  •22 forks•11 star•2323 issues•22 pull requests•Updated May 29, 2026May 29, 2026

• openstudio-ee-gem

  Public
  Ruby

  •

  Other

  •1010 forks•33 stars•88 issues•66 pull requests•Updated May 29, 2026May 29, 2026

• torc

  Public
  Workflow management system

  hpcslurmpipelines+ 1

  hpcslurmpipelinesworkflows

  Rust

  •

  BSD 3-Clause "New" or "Revised" License

  •66 forks•1818 stars•1111 issues•22 pull requests•Updated May 29, 2026May 29, 2026

• EnergyPlus

  Public
  EnergyPlus™ is a whole building energy simulation program that engineers, architects, and researchers use to model both energy consumption and water use in buil…

  C++

  •

  Other

  •475475 forks•1.5k1.5k stars•895895 issues•4646 pull requests•Updated May 29, 2026May 29, 2026

• PVDegradationTools

  Public
  Set of tools to calculate degradation responses and degradation related parameters for PV.

  pythonreliabilitydegradation+ 3

  pythonreliabilitydegradationphotovoltaic-systemspv-modulesduramat

  Jupyter Notebook

  •

  Other

  •2424 forks•4444 stars•4545 issues•99 pull requests•Updated May 29, 2026May 29, 2026

• ssc

  Public
  SAM Simulation Core (SSC) contains the underlying performance and financial models for SAM

  C++

  •

  BSD 3-Clause "New" or "Revised" License

  •116116 forks•9393 stars•2828 issues•88 pull requests•Updated May 29, 2026May 29, 2026

• arco

  Public
  Rust

  •

  BSD 3-Clause "New" or "Revised" License

  •22 forks•66 stars•3636 issues•77 pull requests•Updated May 29, 2026May 29, 2026

• WAVES

  Public
  Offshore Wind Farm Lifecycle Estimation

  pythonsimulationwind-energy+ 4

  pythonsimulationwind-energydiscrete-event-simulationlcoewind-energy-analyticsoffshore-wind

  Python

  •

  Apache License 2.0

  •1212 forks•1515 stars•00 issues•00 pull requests•Updated May 29, 2026May 29, 2026

• phygnn

  Public
  physics-guided neural networks (phygnn)

  machine-learningdeep-learningneural-networks

  machine-learningdeep-learningneural-networks

  Python

  •

  BSD 3-Clause "New" or "Revised" License

  •3232 forks•103103 stars•22 issues•22 pull requests•Updated May 29, 2026May 29, 2026

• SAM

  Public
  System Advisor Model (SAM)

  C++

  •

  BSD 3-Clause "New" or "Revised" License

  •214214 forks•456456 stars•8484 issues•55 pull requests•Updated May 29, 2026May 29, 2026

• disco

  Public
  DISCO

  Python

  •

  BSD 3-Clause "New" or "Revised" License

  •1515 forks•1212 stars•1717 issues•77 pull requests•Updated May 29, 2026May 29, 2026

• PyPSSE

  Public
  Python

  •

  BSD 3-Clause "New" or "Revised" License

  •3232 forks•4949 stars•22 issues•11 pull request•Updated May 29, 2026May 29, 2026

• reVeal

  Public
  The reV Extension for Analyzing Large Loads (reVeal) is an open-source geospatial software package for modeling the site-suitability and spatial patterns of dep…

  Python

  •

  BSD 3-Clause "New" or "Revised" License

  •44 forks•3131 stars•1010 issues•11 pull request•Updated May 29, 2026May 29, 2026

• REopt_API

  Public
  The model for the REopt API, which is used as the back-end for the REopt Webtool (reopt.nrel.gov/tool), and can be accessed directly via the NREL Developer Netw…

  optimizationnrelrenewable-energy+ 3

  optimizationnrelrenewable-energyreopt-lite-apireopt-apireoptjl

  Python

  •

  Other

  •6767 forks•123123 stars•4444 issues•1919 pull requests•Updated May 29, 2026May 29, 2026

• HPC

  Public
  A collection of various resources, examples, and executables for the general NLR HPC user community's benefit. Use the following website for accessing documenta…

  traininglaboratoryperformance+ 9

  traininglaboratoryperformanceenergyhpclabslurmnationalcomputinghigh+ 2

  Jupyter Notebook

  •

  Other

  •8787 forks•152152 stars•5454 issues•1111 pull requests•Updated May 29, 2026May 29, 2026

• windwatts

  Public
  TypeScript

  •

  BSD 3-Clause "New" or "Revised" License

  •1010 forks•44 stars•2626 issues•33 pull requests•Updated May 29, 2026May 29, 2026

• api-umbrella

  Public
  Open source API management platform

  nginxluaapi-management+ 4

  nginxluaapi-managementapi-gatewayluajitopenrestyapi-manager

  Ruby

  •

  MIT License

  •366366 forks•2.2k2.2k stars•230230 issues•2626 pull requests•Updated May 29, 2026May 29, 2026

• pysam

  Public
  Python Wrapper for the System Advisor Model

  C

  •

  BSD 3-Clause "New" or "Revised" License

  •8080 forks•138138 stars•1919 issues•33 pull requests•Updated May 29, 2026May 29, 2026

• LiAISON

  Public
  Lifecyle Analysis Integration into Scalable Opensource Numerical models (LiAISON)

  Python

  •

  BSD 3-Clause "New" or "Revised" License

  •1010 forks•1919 stars•2020 issues•00 pull requests•Updated May 29, 2026May 29, 2026

• routee-transit

  Public
  Predict energy consumption for transit buses based on GTFS data

  Python

  •

  BSD 3-Clause "New" or "Revised" License

  •00 forks•11 star•99 issues•00 pull requests•Updated May 29, 2026May 29, 2026