The updated 45VH2-GREET model includes new feedstocks, technologies, and assumptions in alignment with final rules.
Hydrogen and Fuel Cell Technologies Office
January 15, 2025
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Today, the U.S. Department of Energy (DOE) released an update to the 45VH2-GREET model, which has been adopted by the Department of the Treasury for the purposes of calculating well-to-gate emissions of hydrogen production facilities for the clean hydrogen production tax credit established in Internal Revenue Code (I.R.C. section 45V [45V tax credit]).
DOE also released the 45ZCF-GREET model. This announcement follows the U.S. Department of the Treasury and Internal Revenue Service guidance on the Clean Fuels Production Credit (section 45Z) released on Jan. 10, 2025. The Clean Fuels Production Credit provides a tax credit for the production of transportation fuels with life cycle greenhouse gas (GHG) emissions below certain levels. The credit applies to eligible transportation fuel produced domestically after Dec. 31, 2024, that is sold by Dec. 31, 2027.
45VH2-GREET Rev. January 2025 is available on the DOE GREET webpage along with an updated manual and updated change control logs. The model is designed specifically to evaluate the emissions of hydrogen production processes, to meet the requirements and objectives of section 45V, and to include features that make it easy to use for taxpayers.
For questions on how to use the model, please contact [email protected].
45ZCF-GREET includes feedstock-specific fuel production pathways for sustainable aviation fuels (SAF) and non-SAF fuels. The model is designed specifically to evaluate life cycle GHG emissions to meet the requirements of section 45Z and to include features that make it easy to use for taxpayers.
DOE also released the 45ZCF-GREET User Manual which describes how the 45ZCF-GREET model characterizes life cycle GHG emissions of transportation fuel production pathways and provides guidance for using the model to determine emissions rates for clean fuels under section 45Z.
The 45ZCF-GREET model and user manual are available on the DOE GREET webpage.