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    734 repositories

    • NEB-Tool

      Public
      A user friendly, graphical, open-source application (Web/Mac/Windows) of the multiple benefits framework for non-energy benefits, incorporating additional aspects to make the tool effective for use in the United States.
      TypeScript
      •
      Other
      •8•2•63•1•Updated Oct 13, 2025Oct 13, 2025

    • ssc

      Public
      SAM Simulation Core (SSC) contains the underlying performance and financial models for SAM
      C++
      •
      BSD 3-Clause "New" or "Revised" License
      •110•88•27•6•Updated Oct 13, 2025Oct 13, 2025

    • BuildingMOTIF

      Public
      Building Metadata OnTology Interoperability Framework (BuildingMOTIF). For models, see https://models.open223.info/
      Jupyter Notebook
      •
      Other
      •16•60•58•12•Updated Oct 13, 2025Oct 13, 2025

    • osos

      Public
      Open Source Ops and Statistics (OSOS)
      Python
      •
      BSD 3-Clause "New" or "Revised" License
      •8•9•0•0•Updated Oct 13, 2025Oct 13, 2025

    • REopt.jl

      Public
      Julia
      •
      Apache License 2.0
      •41•34•87•30•Updated Oct 13, 2025Oct 13, 2025

    • pyvisco

      Public
      Pyvisco is a Python library that supports the identification of Prony series parameters for Generalized Maxwell models describing linear viscoelastic materials.
      curve-fittingfinite-element-methodsmaterial-modellingviscoelasticityprony
      Jupyter Notebook
      •
      Other
      •10•15•0•0•Updated Oct 13, 2025Oct 13, 2025

    • r2x-reeds

      Public
      Reeds parser and models
      reedsr2x-core
      Python
      •
      BSD 3-Clause "New" or "Revised" License
      •0•2•1•1•Updated Oct 13, 2025Oct 13, 2025

    • r2x-core

      Public
      R2X framework core package
      Python
      •
      BSD 3-Clause "New" or "Revised" License
      •0•4•0•1•Updated Oct 13, 2025Oct 13, 2025

    • HistoricalLoadData

      Public
      This repository will contain the process used to create historical county-level hourly load data used in NREL's ReEDS model.
      Jupyter Notebook
      •0•0•0•0•Updated Oct 12, 2025Oct 12, 2025

    • reVRt

      Public
      The reV Routing tool introduces a spatially-aware, least-cost-path methodology that allows users to consider siting constraints, regional component costs, land composition costs, point-of-interconnection costs, and network upgrade costs to estimate the transmission infrastructure requirements for new electrical grid connections.
      Python
      •
      BSD 3-Clause "New" or "Revised" License
      •0•2•46•2•Updated Oct 12, 2025Oct 12, 2025

    • openstudio-standards

      Public
      Ruby
      •
      Other
      •68•96•61•4•Updated Oct 12, 2025Oct 12, 2025

    • 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
      •448•1.3k•906•46•Updated Oct 12, 2025Oct 12, 2025

    • resstock

      Public
      Highly granular modeling of residential building stocks at national, regional, and local scales using OpenStudio/EnergyPlus.
      Ruby
      •
      Other
      •81•130•68•21•Updated Oct 12, 2025Oct 12, 2025

    • Exagoop

      Public
      C++
      •
      BSD 3-Clause "New" or "Revised" License
      •5•9•0•0•Updated Oct 12, 2025Oct 12, 2025

    • altrios

      Public
      Rust
      •
      Other
      •11•25•9•10•Updated Oct 11, 2025Oct 11, 2025

    • 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
      •27•43•56•8•Updated Oct 11, 2025Oct 11, 2025

    • GEOPHIRES-X

      Public
      GEOPHIRES is NREL's free and open-source geothermal techno-economic simulator.
      Python
      •
      MIT License
      •36•44•67•0•Updated Oct 11, 2025Oct 11, 2025

    • MoorPy

      Public
      Python
      •
      BSD 3-Clause "New" or "Revised" License
      •30•43•7•0•Updated Oct 11, 2025Oct 11, 2025

    • C4.jl

      Public
      Julia
      •
      BSD 3-Clause "New" or "Revised" License
      •0•0•0•0•Updated Oct 11, 2025Oct 11, 2025

    • OpenStudio-HPXML

      Public
      Modeling of residential buildings in EnergyPlus using OpenStudio/HPXML.
      Ruby
      •
      Other
      •26•54•120•19•Updated Oct 10, 2025Oct 10, 2025

    • PRAS

      Public
      NREL's Probabilistic Resource Adequacy Suite (PRAS)
      Julia
      •26•67•24•2•Updated Oct 10, 2025Oct 10, 2025

    • OpenStudio-ERI

      Public
      Energy Rating Index (ERI) calculation via OpenStudio/EnergyPlus.
      Ruby
      •
      Other
      •18•23•7•4•Updated Oct 10, 2025Oct 10, 2025

    • bambam

      Public
      Rust
      •
      BSD 3-Clause "New" or "Revised" License
      •1•0•5•2•Updated Oct 10, 2025Oct 10, 2025

    • OpenStudio

      Public
      OpenStudio is a cross-platform collection of software tools to support whole building energy modeling using EnergyPlus and advanced daylight analysis using Radiance.
      energyplusopenstudioopenstudio-sdk
      C++
      •
      Other
      •218•555•219•27•Updated Oct 10, 2025Oct 10, 2025

    • dw-tap-api

      Public
      TypeScript
      •
      BSD 3-Clause "New" or "Revised" License
      •7•3•42•2•Updated Oct 10, 2025Oct 10, 2025

    • developer.nrel.gov

      Public
      An issue tracker for NREL's APIs available at https://developer.nrel.gov
      HTML
      •55•53•15•3•Updated Oct 10, 2025Oct 10, 2025

    • geoPFA

      Public
      Geothermal Play Fairway Analysis
      energygeothermal
      Python
      •0•0•0•1•Updated Oct 10, 2025Oct 10, 2025

    • api-umbrella

      Public
      Open source API management platform
      nginxluaapi-managementapi-gatewayluajitopenrestyapi-manager
      Ruby
      •
      MIT License
      •350•2.1k•229•9•Updated Oct 10, 2025Oct 10, 2025

    • H2Integrate

      Public
      PowerBuilder
      •
      Other
      •24•14•98•6•Updated Oct 10, 2025Oct 10, 2025

    • infrasys

      Public
      Data store for components and time series in support of Python-based modeling packages
      Python
      •
      BSD 3-Clause "New" or "Revised" License
      •8•9•22•1•Updated Oct 10, 2025Oct 10, 2025