For versions of GREET used for determining tax credits, please click here.
R&D GREET Model Platforms
R&D GREET.Net Model Platform
R&D GREET.Net provides the user with an easy to use and fully graphical toolbox to perform life cycle analysis simulations of alternative transportation fuels and vehicle technologies in a matter of a few clicks. The tool includes the data of both fuel-cycle and vehicle-cycle of the R&D GREET Excel models.
R&D GREET Excel Model Platform
R&D GREET Excel is the traditional multidimensional spreadsheet model that provides a comprehensive, life-cycle-based approach to compare the energy use and emissions of conventional and advanced vehicle technologies. It includes two sub-models named Fuel-Cycle Model (R&D GREET 1, contains data on fuel cycles and vehicle operations) and Vehicle-Cycle Model (R&D GREET 2, evaluates the energy and emission effects associated with vehicle material recovery and production, vehicle component fabrication, vehicle assembly, and vehicle disposal/recycling).