GREET

The Argonne National Laboratory R&D GREET Model is used to evaluate energy use and emissions output of transportation and energy sector technologies to assess research and development progress and inform RD&D direction.

R&D GREET is available both as a Microsoft Excel file as well as a .NET tool.

40BSAF-GREET is the model that has been adopted by the U.S. Department of the Treasury to calculate the emissions reduction percentages under the Sustainable Aviation Fuel Credit, § 40B(e)(2) of the Inflation Reduction Act.

Download the latest version of the model: 40BSAF-GREET (Rev. October 2024).

Download the 40BSAF-GREET user manual. A log of all changes made in this version of 40BSAF-GREET is available, as well as an archive of older versions of 40BSAF-GREET.

Users should ensure that they are running the model on Microsoft Office 365 on a Windows operating system. Users should also ensure that the zip file is downloaded to a hard drive on their computer rather than a virtual drive (e.g. cloud drive).

Download a fact sheet of frequently asked questions (FAQs) and corresponding answers about how to use 40BSAF-GREET. Past versions of the FAQ are available on the 40BSAF-GREET archive page.

If you have questions on how to use 40BSAF-GREET, please submit them to 40BSAFGREETSupport@ee.doe.gov. DOE will only respond to questions on how to use 40BSAF-GREET. Questions about the fuel credit and eligibility for the fuel credit should be directed to the Internal Revenue Service. DOE will not respond to questions about the 40B fuel credit or eligibility for the fuel credit.

45VH2-GREET is the model that has been adopted by the U.S. Department of the Treasury to determine emissions rates for purposes of the Clean Hydrogen Production Tax Credit under Title 26 of the U.S. Code, Section 45V.

Download the latest version of the model: 45VH2-GREET (Rev. January 2025). A log of all changes made in this version of the model is available, as well as an archive of older versions of 45VH2-GREET.

The 45VH2-GREET (Rev. January 2025) user manual describes the methodology used by 45VH2-GREET to calculate life cycle greenhouse gas emissions of hydrogen production under a well-to-gate system boundary and provides instructions on how the model should be used. A log of all changes made in this version of the manual is available.

Users should ensure that they are running the model on Microsoft Office 365 or Microsoft Office 2021, on a Windows operating system. Users should also ensure that the zip file is downloaded to a hard drive on their computer rather than a virtual drive (e.g. cloud drive).

Download a factsheet of frequently asked questions (FAQs) and corresponding answers about how to use 45VH2-GREET.

If you have questions on how to use 45VH2-GREET, please submit them to 45VH2GREETSupport@ee.doe.gov. DOE will only respond to questions on how to use 45VH2-GREET. Questions about the 45V tax credit and eligibility for the tax credit should be directed to the Internal Revenue Service. DOE will not respond to questions about the 45V tax credit or eligibility for the tax credit.”

45ZCF-GREET is the model that has been adopted by the U.S. Department of the Treasury to calculate the emissions reduction percentages under the Clean Fuel Production Credit, §45Z(B)(1)(B)(ii) and § 45Z(B)(1)(B)(iii)(II) of the Inflation Reduction Act.

Download the latest version of the model: 45ZCF-GREET.

The 45ZCF-GREET user manual and a fact sheet of frequently asked questions (FAQs) and corresponding answers about how to use 45ZCF-GREET are also available.

Users should ensure that they are running the model on Microsoft Office 365 on a Windows operating system. Users should also ensure that the zip file is downloaded to a hard drive on their computer rather than a virtual drive (e.g. cloud drive).

If you have questions on how to use 45ZCF-GREET, please submit them to eere_bioenergy@ee.doe.gov. DOE will only respond to questions on how to use 45ZCF-GREET. Questions about the fuel credit and eligibility for the fuel credit should be directed to the Internal Revenue Service. DOE will not respond to questions about the 45Z fuel credit or eligibility for the fuel credit.

The CA-GREET4.0 model is a modified version of the Argonne National Laboratory GREET1 2022 model to reflect California-specific fuel pathways, used to generate the carbon intensities of those fuel pathways.

The ICAO-GREET version is used to estimate and verify the default core life cycle assessment values of the CORSIA-approved safe aviation fuel pathways.