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HEM: Holistic Electricity Model
HEM is a holistic electricity system model developed by NREL that integrates multiple modules to simulate generation, transmission, distribution, and market operations. It allows researchers to evaluate the impacts of policy changes, technology costs, and system constraints on gri...
NLR
Apr 20, 2025
Regional Energy Deployment System
ReEDS is NREL's flagship capacity expansion model that simulates deployment of generation and transmission infrastructure across the continental United States. It incorporates resource availability, technology costs, policy constraints, and transmission limitations to project leas...
NLR
Apr 20, 2025
OpenDSS
OpenDSS (the Open Distribution System Simulator) is a comprehensive, open‑source simulation tool originally developed by EPRI for modeling electric utility distribution systems. It supports steady‑state and time‑series power flow analysis on unbalanced, three‑phase network...
Electric Power Research Institute
Dec 31, 2024
GridLab-D
GridLAB-D is a new power system simulation tool that provides valuable information to users who design and operate electric power transmission and distribution systems, and to utilities that wish to take advantage of the latest smart grid technology. It incorporates advanced model...
Pacific Northwest National Laboratory
Jan 19, 2023
2 Resources
2 Resources
The Distributed Energy Resources Customer Adoption Model (DER-CAM)
DER CAM is a decision support model developed by Lawrence Berkeley National Laboratory to identify optimal combinations of distributed energy resources (e.g., solar PV, battery storage, CHP, and demand response) for buildings or multi-energy microgrids. Given load profiles, utilit...
Laboratory, N. Lawrence Berkeley National Laboratory
Dec 31, 2024
reV: The Renewable Energy Potential Model
reV (the Renewable Energy Potential Model) is a modular, open-source modeling tool developed by NREL to estimate technical potential, generation profiles, and capacity factors for renewable energy resources. It processes spatially resolved data including resource maps, land-use ex...
NLR
Mar 09, 2025
Distributed Energy Resource Evaluation Tool (DER-VET)
DER-VET™ provides a free, publicly accessible, open-source platform for calculating, understanding, and optimizing the value of distributed energy resources (DER) based on their technical merits and constraints. An extension of EPRI's StorageVET® tool, DER-VET supports site-spe...
Electric Power Research Institute
Dec 17, 2024
NREL's PVWatts Calculator
PVWatts is an easy to use calculator from NREL that estimates the annual energy output and levelized cost of electricity for a grid connected photovoltaic system based on system size, location, array tilt, and basic performance assumptions. It uses National Solar Radiation Databas...
NLR
Dec 31, 2024
Distributed Energy Resource Framework
The Distributed Energy Resource Cybersecurity Framework (DER-CF) is a guidance and assessment tool developed by NREL and industry partners to help organizations evaluate the cybersecurity posture of their distributed energy resource systems. The tool provides a structured question...
NLR
Dec 31, 2025
Resilient Node Cluster Analysis Tool (ReNCAT)
The Resilient Node Cluster Analysis Tool (ReNCAT) is an optimization‑based desktop application developed by Sandia National Laboratories to support community‑scale resilience planning. ReNCAT combines distribution system topology, critical‑infrastructure locations (such as h...
Sandia National Laboratories
Dec 31, 2025
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