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This website contains the U.S. Department of Energy (DOE) Approved Software List which lists software that may be used to verify compliance with the energy efficiency requirements for the tax credit under § 45L of the Internal Revenue Code (45L).

This website also specifies the information required to be submitted by software providers to the DOE and the Internal Revenue Service (IRS) for DOE review and consideration for the DOE Approved Software List. DOE will review submitted software and update the DOE Approved Software List in coordination with the IRS.   

Record of Recent Website Changes

The memos listed below document recent changes to this website. Not all website updates are reflected in the memos.

DOE Approved Software List

The software appearing on this list are approved to calculate whether a home acquired (by sale or lease) meets the energy-efficiency requirements for the 45L tax credit, subject to the noted restrictions based on building permit date.

Note: Software previously approved at the state level have been removed from the DOE Approved Software List. While states may determine which entities are eligible to certify the tax credit, they may not approve which software can be used to meet the energy-efficiency requirements of the 45L tax credit. Software listed here are the only ones approved by DOE for determining whether a home meets the energy-efficiency requirements of the 45L tax credit.

DOE Approved Software List

Software Name, Version, and Software Developer InformationVersion of RESNET’s “Procedures for Certifying Residential Energy Efficiency Tax Credits” used to Validate Software

DOE Expiration DateA for Software Use in 45L CertificationsB

Ekotrope RATER Version 2.2
Ekotrope RATER Version 3.0.0
Ekotrope RATER Version 3.1.0; 3.1.1
Ekotrope RATER Version 3.2.0; 3.2.1; 3.2.2; 3.2.3
Ekotrope
Phone: (617) 453-8043
Email contact: cy@ekotrope.com
Website: ekotrope.com

RESNET Publication 2013-001

August 1, 2020

Ekotrope RATER Version 3.2.4
Ekotrope
Phone: (617) 453-8043
Email contact: cy@ekotrope.com
Website: ekotrope.com

RESNET Publication 2016-001

December 31, 2020

EnergyGauge® USA Version 5.1
Florida Solar Energy Center
Phone: (321) 638-1404
Email contact: Robin@fsec.ucf.edu
Website: www.energygauge.com

RESNET Publication 2013-001

August 1, 2020

EnergyGauge® USA Version 6.0
Florida Solar Energy Center
Phone: (321) 638-1404
Email contact: Robin@fsec.ucf.edu
Website: www.energygauge.com

RESNET Publication 2016-001December 31, 2020

EnergyGauge® USA Version 6.1
Florida Solar Energy Center
Phone: (321) 638-1404
Email contact: Robin@fsec.ucf.edu
Website: www.energygauge.com

RESNET Publication 2013-001August 1, 2020
EnergyGauge® USA Version 6.1.09
Florida Solar Energy Center
Phone: (321) 638-1404
Email contact: Robin@fsec.ucf.edu
Website: www.energygauge.com
RESNET Publication 2016-001December 31, 2020

Micropas v7.60
Enercomp Inc.
Phone: 530-885-9890
Email contact: ken@enercomp.net
Website: www.cheers45l.com

RESNET Publication 2016-001December 31, 2020

REM/Rate v15.4 (and subsequent releases of v15.4.x)
REM/Rate v15.6 (and subsequent releases of v15.6.x)
REM/Rate v15.7 (and subsequent releases of v15.7.x)

REM/Rate v15.8 (and subsequent releases of v15.8.x)
REM/Rate v16.0 – v16.0.3
NORESCO
Phone: (303) 459-7504
Email contact: bchristensen@noresco.com
Website: www.remrate.com

RESNET Publication 2013-001August 1, 2020

REM/Rate v16.0.4 (and subsequent releases of v16.0.x)
NORESCO
Phone: (303) 459-7504
Email contact: bchristensen@noresco.com
Website: www.remrate.com

RESNET Publication 2016-001December 31, 2020

A Homes must have a building permit date before this date in order to use this software for a 45L certification.  Note that 45L certifications must also adhere to all other IRS requirements including field verification provisions.

B If future extensions of 45L are enacted and alter the energy savings requirements or other significant provisions of 45L certification, then this may trigger software previously listed by DOE to be phased out and no longer eligible for use in 45L certifications which occur after the extension.

Submission Instructions to be Considered for the DOE Approved Software List

A software program will be considered for inclusion on the DOE Approved Software List if the software developer submits to DOE and the IRS the following information:

1. The company name, program contact and corresponding email address, mailing address, telephone number, and website address of the software developer.

2. The name, version number, or other identifier of the software program as it will appear on the list, and its release date.

3. Access to the software program, made available to DOE by means of either a link to a downloadable copy of the software or online access instructions and credentials. This information should be emailed to DOE at the email address noted below. A copy of the software program must also be provided to the IRS on a zip drive at the mailing address provided below. Submissions that are incomplete or contain bugs or features requiring correction may be delayed in the review process and placed at end of the submission queue.

4. The software program’s test results and test runs (input decks) for the tests identified in RESNET’s “Procedures for Certifying Residential Energy Efficiency Tax Credits.” The applicable version of this document used to evaluate the software is determined by the manufacturer, provided that the software submission date does not surpass the date shown in the following table:

 Version of RESNET Publication 001: “Procedures for Certifying Residential Energy Efficiency Tax Credits”
20132016A2020
Software Must be Submitted to DOE for Review Prior to:5/1/202011/1/2020No current date restriction

A. Compliance with the Appendix C e-ratio test shall not be required for Test Case 4.

Test results should be presented using the four templates available here, or a comparable format showing test results versus allowable values.

5. A signed declaration by the developer of the software program, made under penalties of perjury, that the software program has satisfied all tests required to conform to the software accreditation process prescribed in RESNET Publication 001-[enter version number].

Submissions to DOE under this section must be addressed as follows:

Email Address: 45Lsoftware@ee.doe.gov
Email Subject: 45L Software Submission

Note that this email address is intended only for software submissions.

Submissions to IRS must be submitted in hard copy and mailed to:

Internal Revenue Service
Attn: Program Administrator            
CC:PSI:6, Room 5114
P.O. Box 7604
Ben Franklin Station
Washington, DC 20044  

DOE will review the materials submitted by software developers and evaluate them relative to the verification tests established in the relevant version of RESNET’s “Procedures for Certifying Residential Energy Efficiency Tax Credits.” Software programs determined by DOE to have acceptable verification test results will be included on the DOE Approved Software List.

DOE may make available for public review any information submitted to it as part of the software submission package described here.