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    754 repositories

    • 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 buildings.
      C++
      •
      Other
      •461•1.4k•900•27•Updated Jan 22, 2026Jan 22, 2026

    • rex

      Public
      REsource eXtraction Tool (rex)
      Python
      •
      BSD 3-Clause "New" or "Revised" License
      •25•29•7•1•Updated Jan 22, 2026Jan 22, 2026

    • api-umbrella

      Public
      Open source API management platform
      nginxluaapi-managementapi-gatewayluajitopenrestyapi-manager
      Ruby
      •
      MIT License
      •366•2.1k•229•8•Updated Jan 22, 2026Jan 22, 2026

    • r2x-plexos

      Public
      Repo for plugin of PLEXOS
      Python
      •
      BSD 3-Clause "New" or "Revised" License
      •1•2•0•6•Updated Jan 22, 2026Jan 22, 2026

    • DynamicLineRatings

      Public
      Jupyter Notebook
      •
      BSD 3-Clause "New" or "Revised" License
      •10•6•0•0•Updated Jan 22, 2026Jan 22, 2026

    • geoPFA

      Public
      Geothermal Play Fairway Analysis
      energygeothermal
      Python
      •
      BSD 3-Clause "New" or "Revised" License
      •1•3•0•2•Updated Jan 22, 2026Jan 22, 2026

    • REopt.jl

      Public
      Julia
      •
      Apache License 2.0
      •47•38•91•39•Updated Jan 22, 2026Jan 22, 2026

    • OpenStudio-HPXML

      Public
      Modeling of residential buildings in EnergyPlus using OpenStudio/HPXML.
      Ruby
      •
      Other
      •27•60•123•19•Updated Jan 22, 2026Jan 22, 2026

    • alfalfa

      Public
      Alfalfa is a web service that enables runtime interaction with building energy models (OpenStudio/EnergyPlus and FMUs compiled from Modelica or Spawn) over REST APIs.
      Python
      •
      Other
      •19•55•53•24•Updated Jan 21, 2026Jan 21, 2026

    • OpenStudio-PAT

      Public
      The Parametric Analysis Tool (PAT) is part of the OpenStudio collection of software tools.
      Ruby
      •
      Other
      •18•34•71•29•Updated Jan 21, 2026Jan 21, 2026

    • SolTrace

      Public
      SolTrace
      C++
      •
      Other
      •44•51•34•3•Updated Jan 21, 2026Jan 21, 2026

    • buildstockbatch

      Public
      Python
      •
      Other
      •21•26•50•16•Updated Jan 21, 2026Jan 21, 2026

    • pySMARTS

      Public
      Python wrapper for SMARTS2, Simple Model of the Atmospheric Radiative Transfer of Sunshine
      Python
      •
      Other
      •11•18•2•0•Updated Jan 21, 2026Jan 21, 2026

    • ComStock

      Public
      National scale modeling of the U.S. commercial building stock supported by U.S. DOE, LADWP, and others and maintained by NREL
      Ruby
      •
      Other
      •28•47•61•7•Updated Jan 21, 2026Jan 21, 2026

    • FuelLib

      Public
      FuelLib is a library that utilizes the group contribution method (GCM) for calculating thermodynamic properties of hydro-carbon jet fuels.
      Python
      •
      BSD 3-Clause "New" or "Revised" License
      •3•2•0•0•Updated Jan 21, 2026Jan 21, 2026

    • soogo

      Public
      Surrogate-based 0-th Order Global Optimization for black-box problems.
      aiblack-box-optimizationoptimization-algorithmsexpensive-to-evaluate-functionssurrogate-based-optimizationgradient-free-optimization
      Python
      •
      GNU General Public License v3.0
      •9•5•0•1•Updated Jan 21, 2026Jan 21, 2026

    • bifacial_radiance

      Public
      Toolkit for working with RADIANCE for the ray-trace modeling of Bifacial Photovoltaics
      guiradiancerenewable-energyrenewablesphotovoltaicsbifacial
      HTML
      •
      BSD 3-Clause "New" or "Revised" License
      •57•102•82•1•Updated Jan 21, 2026Jan 21, 2026

    • hsds-examples

      Public
      Examples of using the HSDS Service to Access NREL WIND Toolkit data
      Jupyter Notebook
      •
      Other
      •52•125•4•0•Updated Jan 21, 2026Jan 21, 2026

    • openstudio-standards

      Public
      Ruby
      •
      Other
      •66•101•58•8•Updated Jan 21, 2026Jan 21, 2026

    • HPC

      Public
      A collection of various resources, examples, and executables for the general NREL HPC user community's benefit. Use the following website for accessing documentation.
      traininglaboratoryperformanceenergyhpclabslurmnationalcomputinghigh
      Jupyter Notebook
      •
      Other
      •85•141•55•9•Updated Jan 21, 2026Jan 21, 2026

    • H2Integrate

      Public
      PowerBuilder
      •
      BSD 3-Clause "New" or "Revised" License
      •27•18•98•12•Updated Jan 21, 2026Jan 21, 2026

    • bambam

      Public
      Rust
      •
      BSD 3-Clause "New" or "Revised" License
      •2•1•16•3•Updated Jan 21, 2026Jan 21, 2026

    • r2x-reeds

      Public
      Reeds parser and models
      reedsr2x-core
      Python
      •
      BSD 3-Clause "New" or "Revised" License
      •2•2•3•2•Updated Jan 21, 2026Jan 21, 2026

    • chronify

      Public
      Python
      •
      BSD 3-Clause "New" or "Revised" License
      •7•5•22•4•Updated Jan 21, 2026Jan 21, 2026

    • reV-tutorial

      Public
      Tutorials for using the Renewable Energy Potential Model (reV)
      PowerBuilder
      •7•6•0•0•Updated Jan 21, 2026Jan 21, 2026

    • ALchemist

      Public
      Python
      •
      BSD 3-Clause "New" or "Revised" License
      •2•2•0•0•Updated Jan 21, 2026Jan 21, 2026

    • nrel_bootstrap

      Public
      NREL.gov APP branded theme for Bootstrap 3 - based on nrel-app-template - https://github.com/NREL/nrel-app-template
      Twig
      •7•0•0•0•Updated Jan 21, 2026Jan 21, 2026

    • OCHRE

      Public
      A Python-based building energy modeling (BEM) tool designed to model flexible loads in residential buildings
      buildingsresidentialload-shiftingdistributed-energy-resourcesresidential-controls
      Python
      •
      BSD 3-Clause "New" or "Revised" License
      •32•70•88•7•Updated Jan 21, 2026Jan 21, 2026

    • ComStock.github.io

      Public
      Jupyter Notebook
      •
      MIT License
      •10•1•0•1•Updated Jan 21, 2026Jan 21, 2026

    • get-resstock

      Public
      ResStock customized for the ICF / SoCalGas Gas Emerging Technologies project
      Ruby
      •
      Other
      •1•1•6•3•Updated Jan 21, 2026Jan 21, 2026