Energy Efficiency Resources

The Database for Energy Efficient Resources (DEER) contains information on selected energy-efficient technologies and measures. The DEER provides estimates of the energy-savings potential for these technologies in residential and nonresidential applications. The database contains information on typical measures -- those commonly installed in the marketplace -- and data on the costs and benefits of more energy-efficient measures. Energy-efficient measures provide the same energy services using less energy, but they usually cost slightly more.

Updates to the Database for Energy Efficiency Resources (DEER) have been developed by the California Public Utilities Commission (CPUC) with funding provided by California ratepayers.

What's Happening

DEER2019 and June 2017 updates have been added to the PEAR database and are described on a new DEER Versions page.

2017 Phase 1 dispositions are added to the Non-DEER Work Papers page.

The 2017 Workpaper Guidance Document is added to the Non-DEER Work Papers page.

DEER2017 and DEER2018 values have been added to the ex ante database. See the update descriptions under the DEER Versions menu for more information.

READI version 2.4.7 released; this version supports the Official Ex Ante database as well as the Preliminary Ex Ante Review database." See About READI for more information.

Note: As of 8/5/2016 the April 5th release of READI is a required update; all users are encouraged to use the new version of READI and report any connection issues to This email address is being protected from spambots. You need JavaScript enabled to view it.. The server that READI v2.3 (and all previous versions) connects to has been upgraded and is no longer available.

Dispositions from the second half of 2016 are added to the Non-DEER Work Papers page.

Pursuant to Decision (D.) 13-09-023, Commission staff scored the utilities on their annual ex ante review performance as part of the Efficiency Savings and Performance Incentive. The final 2015 ESPI memos are published under the Energy Savings and Performance Incentive section under the main menu. Commission staff will be holding meetings with each utility to discuss the final scores.