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National Renewable Energy Laboratory

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  1. api-umbrella api-umbrella Public

    Open source API management platform

    Ruby 2k 335

  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++ 1.2k 425

  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++ 526 208

  4. SAM SAM Public

    System Advisor Model (SAM)

    C++ 360 183

  5. floris floris Public

    A controls-oriented engineering wake model.

    Python 233 171

  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 196 74

Repositories

Showing 10 of 670 repositories
  • REopt.jl Public
    NREL/REopt.jl’s past year of commit activity
    Julia 27 Apache-2.0 32 81 35 Updated Mar 5, 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 119 75 66 (1 issue needs help) 23 Updated Mar 5, 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++ 1,195 425 898 35 Updated Mar 5, 2025
  • chronify Public
    NREL/chronify’s past year of commit activity
    Python 3 BSD-3-Clause 6 21 (1 issue needs help) 1 Updated Mar 5, 2025
  • altrios Public
    NREL/altrios’s past year of commit activity
    Rust 20 10 4 10 Updated Mar 5, 2025
  • OpenStudio-ERI Public

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

    NREL/OpenStudio-ERI’s past year of commit activity
    Ruby 21 17 6 4 Updated Mar 5, 2025
  • windtools Public

    Python tools for wind simulation setup, data processing, and analysis

    NREL/windtools’s past year of commit activity
    Python 37 Apache-2.0 23 2 0 Updated Mar 5, 2025
  • ATB-calc Public

    Python files and Jupyter notebooks for processing the Annual Technology Baseline (ATB) electricity data and determining LCOE and other metrics.

    NREL/ATB-calc’s past year of commit activity
    Python 34 BSD-3-Clause 14 3 2 Updated Mar 5, 2025
  • PRAS Public

    NREL's Probabilistic Resource Adequacy Suite (PRAS)

    NREL/PRAS’s past year of commit activity
    Julia 52 21 10 1 Updated Mar 4, 2025
  • OpenStudio-HPXML Public

    Modeling of residential buildings in EnergyPlus using OpenStudio/HPXML.

    NREL/OpenStudio-HPXML’s past year of commit activity
    Ruby 48 23 110 (1 issue needs help) 22 Updated Mar 4, 2025