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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 350

  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 449

  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++ 555 218

  4. SAM SAM Public

    System Advisor Model (SAM)

    C++ 408 195

  5. floris floris Public

    A controls-oriented engineering wake model.

    Python 255 178

  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 216 83

Repositories

Showing 10 of 731 repositories
  • 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.

    NREL/reVRt’s past year of commit activity
    Python 2 BSD-3-Clause 0 46 3 Updated Oct 9, 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++ 1,330 449 907 48 Updated Oct 9, 2025
  • r2x-core Public

    R2X framework core package

    NREL/r2x-core’s past year of commit activity
    Python 2 BSD-3-Clause 0 0 1 Updated Oct 9, 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 63 BSD-3-Clause 23 1 1 Updated Oct 9, 2025
  • OpenStudio-HPXML Public

    Modeling of residential buildings in EnergyPlus using OpenStudio/HPXML.

    NREL/OpenStudio-HPXML’s past year of commit activity
    Ruby 54 26 122 (1 issue needs help) 20 Updated Oct 9, 2025
  • InSPIRE Public

    Tutorials, scripts and other modeling aspects of agrivoltaics developed by the InSPIRE team

    NREL/InSPIRE’s past year of commit activity
    HTML 14 7 0 0 Updated Oct 9, 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 130 81 71 (1 issue needs help) 22 Updated Oct 8, 2025
  • REopt_API Public

    The model for the REopt API, which is used as the back-end for the REopt Webtool (reopt.nrel.gov/tool), and can be accessed directly via the NREL Developer Network (https://developer.nrel.gov/docs/energy-optimization/reopt)

    NREL/REopt_API’s past year of commit activity
    Python 112 62 43 6 Updated Oct 8, 2025
  • vidyut3d Public
    NREL/vidyut3d’s past year of commit activity
    C++ 7 BSD-3-Clause 10 0 1 Updated Oct 8, 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++ 555 218 216 24 Updated Oct 8, 2025