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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 351

  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 262 180

  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 84

Repositories

Showing 10 of 740 repositories
  • C4.jl Public

    An experimental framework for power system capacity expansion with endogenized probabilistic resource adequacy constraints

    NREL/C4.jl’s past year of commit activity
    Julia 0 BSD-3-Clause 0 0 0 Updated Nov 2, 2025
  • multiscale-biomass-pyrolysis Public
    NREL/multiscale-biomass-pyrolysis’s past year of commit activity
    C++ 6 BSD-3-Clause 9 0 0 Updated Nov 2, 2025
  • ssc Public

    SAM Simulation Core (SSC) contains the underlying performance and financial models for SAM

    NREL/ssc’s past year of commit activity
    C++ 89 BSD-3-Clause 112 28 5 Updated Nov 2, 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 2, 2025
  • marbles Public

    Lattice Boltzmann method solver using adaptive mesh refinement

    NREL/marbles’s past year of commit activity
    Jupyter Notebook 12 Apache-2.0 12 0 1 Updated Nov 1, 2025
  • altrios Public
    NREL/altrios’s past year of commit activity
    Rust 27 11 9 10 Updated Nov 1, 2025
  • spades Public

    Parallel Discrete Events Simulation for heterogenous architectures (e.g., GPUs)

    NREL/spades’s past year of commit activity
    C++ 2 Apache-2.0 0 0 1 Updated Nov 1, 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 Nov 1, 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++ 1,339 454 899 32 Updated Nov 1, 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 1, 2025
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