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National Renewable Energy Laboratory

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  1. api-umbrella api-umbrella Public

    Open source API management platform

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  2. EnergyPlus 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++ 1.3k 454

  3. OpenStudio 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.

    C++ 560 219

  4. SAM SAM Public

    System Advisor Model (SAM)

    C++ 410 197

  5. floris floris Public

    A controls-oriented engineering wake model.

    Python 263 180

  6. OpenOA OpenOA Public

    This library provides a framework for assessing wind plant performance using operational assessment (OA) methodologies that consume time series data from wind plants. The goal of the project is to …

    Jupyter Notebook 219 85

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  • resstock Public

    Highly granular modeling of residential building stocks at national, regional, and local scales using OpenStudio/EnergyPlus.

    NREL/resstock’s past year of commit activity
    Ruby 132 81 68 (2 issues need help) 21 Updated Nov 3, 2025
  • OpenStudio-HPXML Public

    Modeling of residential buildings in EnergyPlus using OpenStudio/HPXML.

    NREL/OpenStudio-HPXML’s past year of commit activity
    Ruby 54 26 118 (1 issue needs help) 18 Updated Nov 3, 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

    NREL/ComStock’s past year of commit activity
    Ruby 43 27 57 6 Updated Nov 3, 2025
  • REopt.jl Public
    NREL/REopt.jl’s past year of commit activity
    Julia 35 Apache-2.0 42 86 30 Updated Nov 3, 2025
  • openstudio-ee-gem Public
    NREL/openstudio-ee-gem’s past year of commit activity
    Ruby 2 7 6 4 Updated Nov 3, 2025
  • OpenStudio-ERI Public

    Energy Rating Index (ERI) calculation via OpenStudio/EnergyPlus.

    NREL/OpenStudio-ERI’s past year of commit activity
    Ruby 23 18 8 5 Updated Nov 3, 2025
  • foundational-industry-energy-data Public

    The Foundational Industry Energy Dataset (FIED) is a unit-level characterization of energy use in the U.S. industrial sector.

    NREL/foundational-industry-energy-data’s past year of commit activity
    Python 10 8 8 3 Updated Nov 3, 2025
  • tyche Public
    NREL/tyche’s past year of commit activity
    Jupyter Notebook 5 MIT 8 9 1 Updated Nov 3, 2025
  • PVDegradationTools Public

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

    NREL/PVDegradationTools’s past year of commit activity
    Jupyter Notebook 39 20 52 (4 issues need help) 8 Updated Nov 3, 2025
  • fastsim Public
    NREL/fastsim’s past year of commit activity
    Rust 33 16 5 8 Updated Nov 3, 2025
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