Owner

NatLabRockies

96 indexed repositories · View on GitHub

api-umbrella
Open source API management platform

Ruby · 2199 stars
EnergyPlus
EnergyPlus™ is a whole building energy simulation program that engineers, architects, and researchers use to model both energy consumptio...

C++ · 1570 stars
OpenStudio
OpenStudio is a cross-platform collection of software tools to support whole building energy modeling using EnergyPlus and advanced dayli...

C++ · 646 stars
SAM
System Advisor Model (SAM)

C++ · 486 stars
floris
A controls-oriented engineering wake model.

Python · 301 stars
rdtools
PV Analysis Tools in Python

Python · 189 stars
pysam
Python Wrapper for the System Advisor Model

C · 150 stars
resstock
Highly granular modeling of residential building stocks at national, regional, and local scales using OpenStudio/EnergyPlus.

Ruby · 147 stars
reV
reV is an open-source geospatial techno-economic tool that estimates energy technical potential (capacity and generation), system cost, a...

Python · 143 stars
sup3r
The Super-Resolution for Renewable Resource Data (sup3r) software uses generative adversarial networks to create synthetic high-resolutio...

Python · 140 stars
REopt_API
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 ...

Python · 125 stars
bifacial_radiance
Toolkit for working with RADIANCE for the ray-trace modeling of Bifacial Photovoltaics

HTML · 107 stars
openstudio-standards

Ruby · 105 stars
phygnn
physics-guided neural networks (phygnn)

Python · 104 stars
ssc
SAM Simulation Core (SSC) contains the underlying performance and financial models for SAM

C++ · 94 stars
PRAS
NLR's Probabilistic Resource Adequacy Suite (PRAS)

Julia · 76 stars
OpenStudio-HPXML
Modeling of residential buildings in EnergyPlus using OpenStudio/HPXML.

Ruby · 70 stars
elm
ELM is a collection of utilities to apply Large Language Models (LLMs) to energy research.

Python · 69 stars
wex
WEX, which is short for WxWidgets Extensions, is a cross-platform library of graphical user interface tools that extends the popular open...

C · 66 stars
nfp
Keras layers for end-to-end learning with rdkit and pymatgen

Python · 62 stars
76 more repositories live on View on GitHub

Beginner friendly Everything

Open All

Enabling Multi-year in Resource Models Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

NatLabRockies/H2Integrate#888 · 1 comment · Opened Sep 18, 2026
Fan:SystemModel ignores Night Ventilation Mode Flow Fraction Open

Triage UnconfirmedDefect

Difficulty 4/5 3-5 days Newbie friendliness 62/100

NatLabRockies/EnergyPlus#11798 · 3 comments · Opened Sep 18, 2026
Upgrade numpy-financial (unpin from 1.0.0) Open

bug

NatLabRockies/GEOPHIRES-X#522 · 1 assignee · Opened Sep 18, 2026
Windows arm64 release build broken due to Cmake detection of Fortran compiler on Github Actions Open

Defect Developer Issue

NatLabRockies/EnergyPlus#11797 · 1 assignee · Opened Sep 18, 2026
Remove or fix "Build and Test" (incremental-build.yml) Open

Continuous Integration Developer Issue

NatLabRockies/OpenStudio#5658 · 2 assignees · Opened Sep 18, 2026
Remove PyPi wheels for Windows Python 3.7 to 3.10 - any objections? Open

component - Python bindings

Difficulty 4/5 3-5 days Newbie friendliness 35/100

NatLabRockies/OpenStudio#5657 · Opened Sep 18, 2026
Implausibly high temperatures for small subset of homes in ResStock 2025.1 release Open

Difficulty 4/5 3-5 days Newbie friendliness 42/100

NatLabRockies/resstock#1572 · 1 comment · Opened Sep 17, 2026
Mixed SEER/EER generations pass validation, and the resulting EnergyPlus failure is reported as an unrelated error Open

Difficulty 4/5 3-5 days Newbie friendliness 65/100

NatLabRockies/OpenStudio-ERI#819 · Opened Sep 16, 2026
Only accept matched SEER/EER pairs (SEER2 with EER2, or SEER with EER) Open

Difficulty 2/5 1-3 hours Newbie friendliness 72/100

NatLabRockies/OpenStudio-HPXML#2270 · Opened Sep 16, 2026
feat: Summarize rules.json used in a particular translation as an image Open

Idea

Difficulty 5/5 Over a week Newbie friendliness 45/100

NatLabRockies/R2X#330 · Opened Sep 15, 2026
prefer model resolve utility Open

settings

Difficulty 3/5 1-2 days Newbie friendliness 55/100

NatLabRockies/windwatts#314 · Opened Sep 15, 2026
Model setting update Open

settings

Difficulty 5/5 Over a week Newbie friendliness 35/100

NatLabRockies/windwatts#313 · Opened Sep 15, 2026
Issues with net metering with $ credits and rollover Open

bug

Difficulty 4/5 3-5 days Newbie friendliness 45/100

NatLabRockies/SAM#2264 · Opened Sep 15, 2026
Adding Pakistan as a rare-earth location? Open

Difficulty 3/5 1-2 days Newbie friendliness 52/100

NatLabRockies/bleecam#1 · Opened Sep 15, 2026
Refactor H2IntegrateModel and split it out; especially checking Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

NatLabRockies/H2Integrate#883 · 3 comments · Opened Sep 14, 2026
Centos9 artifactory remote need prebuilt packages Open

Difficulty 4/5 3-5 days Newbie friendliness 48/100

NatLabRockies/openstudio-cmake-tools#6 · Opened Sep 14, 2026
Retire HEAVY_DUTY powertrain variant Open

Difficulty 5/5 Over a week Newbie friendliness 38/100

NatLabRockies/routee-powertrain#74 · Opened Sep 11, 2026
Wrong weather data in 5 counties Open

Difficulty 5/5 Over a week Newbie friendliness 32/100

NatLabRockies/EPWgen#10 · Opened Sep 11, 2026
Header daylight-saving start and end dates are one day late (arguably 2 days late for end date) Open

Difficulty 3/5 1-2 days Newbie friendliness 72/100

NatLabRockies/EPWgen#9 · Opened Sep 11, 2026
Inadvertent DST shifting in the weather files. Open

Difficulty 4/5 3-5 days Newbie friendliness 65/100

NatLabRockies/EPWgen#8 · Opened Sep 11, 2026
InfraStore 0.12.0 fails to precompile on Julia 1.13: ccall library must be a constant Open

Difficulty 5/5 Over a week Newbie friendliness 42/100

NatLabRockies/infrastore#84 · Opened Sep 11, 2026
gbXML import does not properly handle ground surface temperatures Open

Difficulty 5/5 Over a week Newbie friendliness 35/100

NatLabRockies/openstudio-mcp#158 · Opened Sep 11, 2026
Add more test files Open

Difficulty 3/5 1-2 days Newbie friendliness 48/100

NatLabRockies/hpxml_version_translator#96 · Opened Sep 10, 2026
Meta-Issue: Component Modeling Audit Open

NatLabRockies/fastsim#334 · 4 assignees · Opened Sep 10, 2026
Discussion: A more precise definition of time series in H2Integrate Open

Difficulty 5/5 Over a week Newbie friendliness 35/100

NatLabRockies/H2Integrate#878 · 1 comment · Opened Sep 10, 2026
Add examples that show other workflows to run H2I Open

Difficulty 3/5 1-2 days Newbie friendliness 68/100

NatLabRockies/H2Integrate#877 · Opened Sep 10, 2026
Standardize example references in docs descriptions Open

Difficulty 4/5 3-5 days Newbie friendliness 45/100

NatLabRockies/H2Integrate#876 · 2 comments · Opened Sep 10, 2026
Seperate out requirements for reView-tools from reView Open

Difficulty 2/5 1-3 hours Newbie friendliness 76/100

NatLabRockies/reView#64 · Opened Sep 9, 2026
Consistent maximum temperature for water heaters Open

bug priority low

NatLabRockies/OpenStudio-HPXML#2269 · 1 assignee · Opened Sep 9, 2026
ABC -> Cd/Crr constraints Open

enhancement

NatLabRockies/fastsim#333 · 1 assignee · Opened Sep 9, 2026
Remove unmet_demand output from non-demand components Open

Difficulty 5/5 Over a week Newbie friendliness 35/100

NatLabRockies/H2Integrate#873 · Opened Sep 9, 2026
verify_integrity is O(columns) amplified: ~1 hour on a 4 GB store Open

enhancement

Difficulty 3/5 1-2 days Newbie friendliness 68/100

NatLabRockies/infrastore#80 · Opened Sep 8, 2026
Update models to account for enabled input-to-input connection in OpenMDAO Open

Difficulty 4/5 3-5 days Newbie friendliness 38/100

NatLabRockies/H2Integrate#872 · 1 comment · Opened Sep 8, 2026
Add validation for intermediate HPXML versions Open

Difficulty 3/5 1-2 days Newbie friendliness 62/100

NatLabRockies/hpxml_version_translator#93 · Opened Sep 8, 2026
Concurrent makeModule() corrupts the package-global data/module.json (unlocked read-modify-write) Open

Difficulty 4/5 3-5 days Newbie friendliness 55/100

NatLabRockies/bifacial_radiance#600 · 1 comment · Opened Sep 8, 2026
Building-frame vertex coordinates on surface tools Open

Difficulty 4/5 3-5 days Newbie friendliness 58/100

NatLabRockies/openstudio-mcp#152 · Opened Sep 6, 2026
Add support for custom weather data Open

Difficulty 5/5 Over a week Newbie friendliness 35/100

NatLabRockies/OpenStudio-HPXML-Calibration#149 · Opened Sep 5, 2026
Limit weather station search radius and improve error handling Open

Difficulty 3/5 1-2 days Newbie friendliness 62/100

NatLabRockies/OpenStudio-HPXML-Calibration#148 · Opened Sep 5, 2026
Allow detailed calibration for homes with delivered fuel consumption Open

Difficulty 5/5 Over a week Newbie friendliness 35/100

NatLabRockies/OpenStudio-HPXML-Calibration#147 · Opened Sep 5, 2026
Config class value updating Open

Difficulty 5/5 Over a week Newbie friendliness 30/100

NatLabRockies/H2Integrate#870 · Opened Sep 4, 2026
Documentation Issues - Running list Open

Defect Documentation

NatLabRockies/EnergyPlus#11783 · 1 comment · 1 assignee · Opened Sep 4, 2026
Flakey CI tests with HTTP dependency Open

Difficulty 4/5 3-5 days Newbie friendliness 52/100

NatLabRockies/routee-compass#579 · Opened Sep 2, 2026
Cannot select recently downloaded weather file Open

bug

NatLabRockies/SAM#2263 · 1 assignee · Opened Sep 2, 2026
`dataSource` attributes can be dropped Open

Difficulty 3/5 1-2 days Newbie friendliness 64/100

NatLabRockies/hpxml_version_translator#91 · Opened Sep 2, 2026
Restore ignored Python tests associated with powertrain modeling Open

Difficulty 3/5 1-2 days Newbie friendliness 72/100

NatLabRockies/routee-compass#578 · 2 comments · Opened Sep 2, 2026
Add request per second/minute and concurrent rate limiting Open

Difficulty 4/5 3-5 days Newbie friendliness 45/100

NatLabRockies/COMPASS#553 · Opened Sep 2, 2026
Docling rs Open

NatLabRockies/COMPASS#552 · 1 assignee · Opened Sep 2, 2026
PVWatts single year to lifetime outputs Open

bug

Difficulty 4/5 3-5 days Newbie friendliness 45/100

NatLabRockies/SAM#2262 · 4 comments · Opened Sep 1, 2026
SLC: Technology to SLC connections Open

Difficulty 5/5 Over a week Newbie friendliness 35/100

NatLabRockies/H2Integrate#863 · Opened Aug 31, 2026
VAV terminal warns that an ignored minimum-flow field "will be ignored" even when the field carries no user intent (0 or Autosize) Open

Triage UnconfirmedDefect

NatLabRockies/EnergyPlus#11771 · 1 assignee · Opened Aug 31, 2026

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