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National Renewable Energy Laboratory

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  1. api-umbrella api-umbrella Public

    Open source API management platform

    Ruby 2.1k 355

  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++ 1.4k 456

  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++ 565 219

  4. SAM SAM Public

    System Advisor Model (SAM)

    C++ 415 200

  5. floris floris Public

    A controls-oriented engineering wake model.

    Python 268 180

  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 221 85

Repositories

Showing 10 of 745 repositories
  • torc Public

    Workflow management system

    NREL/torc’s past year of commit activity
    Rust 3 BSD-3-Clause 1 3 1 Updated Nov 27, 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.

    NREL/EnergyPlus’s past year of commit activity
    C++ 1,357 456 895 31 Updated Nov 27, 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.

    NREL/OpenStudio’s past year of commit activity
    C++ 565 219 216 9 Updated Nov 27, 2025
  • docker-openstudio Public

    Repository for managing the builds of OpenStudio Docker images.

    NREL/docker-openstudio’s past year of commit activity
    Dockerfile 22 18 7 1 Updated Nov 27, 2025
  • OpenStudio-HPXML Public

    Modeling of residential buildings in EnergyPlus using OpenStudio/HPXML.

    NREL/OpenStudio-HPXML’s past year of commit activity
    Ruby 55 26 123 (1 issue needs help) 16 Updated Nov 27, 2025
  • r2x-cli Public

    R2X framework repo

    NREL/r2x-cli’s past year of commit activity
    Rust 2 BSD-3-Clause 0 3 5 Updated Nov 27, 2025
  • ABSiCE Public
    NREL/ABSiCE’s past year of commit activity
    Python 11 BSD-3-Clause 9 3 3 Updated Nov 26, 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 40 20 50 (4 issues need help) 7 Updated Nov 26, 2025
  • OpenStudio-ERI Public

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

    NREL/OpenStudio-ERI’s past year of commit activity
    Ruby 23 18 6 3 Updated Nov 26, 2025
  • floris Public

    A controls-oriented engineering wake model.

    NREL/floris’s past year of commit activity
    Python 268 BSD-3-Clause 180 48 16 Updated Nov 26, 2025