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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 345

  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 441

  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++ 547 216

  4. SAM SAM Public

    System Advisor Model (SAM)

    C++ 395 188

  5. floris floris Public

    A controls-oriented engineering wake model.

    Python 244 174

  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 205 80

Repositories

Showing 10 of 706 repositories
  • OpenStudio-HPXML Public

    Modeling of residential buildings in EnergyPlus using OpenStudio/HPXML.

    NREL/OpenStudio-HPXML’s past year of commit activity
    Ruby 53 26 119 (1 issue needs help) 21 Updated Jul 16, 2025
  • 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 127 78 74 (1 issue needs help) 24 Updated Jul 16, 2025
  • developer.nrel.gov Public

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

    NREL/developer.nrel.gov’s past year of commit activity
    HTML 50 53 17 3 Updated Jul 16, 2025
  • R2X Public

    Model translation framework

    NREL/R2X’s past year of commit activity
    Python 13 BSD-3-Clause 16 19 2 Updated Jul 16, 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 41 26 49 12 Updated Jul 16, 2025
  • plexosdb Public

    Database Manager for use with PLEXOS XML files

    NREL/plexosdb’s past year of commit activity
    Python 17 BSD-3-Clause 13 5 0 Updated Jul 16, 2025
  • infrasys Public

    Data store for components and time series in support of Python-based modeling packages

    NREL/infrasys’s past year of commit activity
    Python 9 BSD-3-Clause 8 21 3 Updated Jul 16, 2025
  • elm Public

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

    NREL/elm’s past year of commit activity
    Python 61 BSD-3-Clause 21 1 1 Updated Jul 16, 2025
  • H2Integrate Public
    NREL/H2Integrate’s past year of commit activity
    PowerBuilder 10 19 69 6 Updated Jul 15, 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++ 1,278 441 912 53 Updated Jul 15, 2025
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