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Ex Ante Review

The Ex Ante process estimates the potential energy savings for an energy efficient measure before it is installed based on predictions of typical operating conditions and baseline usage. The process is the basis for utilities to claim savings for their energy efficiency portfolios. The Ex Ante process covers deemed measures (DEER and non-DEER), measures that have well-known and consistent performance characteristics, and custom measures.

The Database of Energy Efficient Resources and Ex Ante Regulatory Support RFP No. 12 PS 5125 contains details on the scope of work for the four work areas of Ex Ante Review.

Ex Ante Review Fact Sheets

The set of fact sheets provide high level information and policy background to the Ex Ante review process. The purpose is to provide the public and stakeholders a better understanding of how the PUC conducts its review process.

Ex Ante Review Fact Sheet #1 provides information on how cost effectiveness is estimated.

Ex Ante Review Fact Sheet #2 provides information on different components of the review process and how each of them works.

Ex Ante Review Fact Sheet #3 provides information on high-level assumption for HVAC savings estimates currently used for the review process.

DEER (Database for Energy Efficient Resources)

DEER, the Database for Energy Efficient Resources, provides energy savings estimates for typical energy efficient technologies and measures. The database contains information and data, such as unit energy savings, effective useful life values, and net to gross ratios for measures that are commonly installed in the marketplace. DEER is currently managed by the Energy Division, with funding provided by California ratepayers. The DEER website, www.deeresources.com, contains the database and all supporting documentation. Data can be accessed and downloaded through the database interface Remote Ex Ante Database Interface (READI) on the DEER website.

The DEER Master Documentation compiles DEER2008, DEER2011, and DEER2014 update documents and data into one directory. The Excel spreadsheet contains information and links to the invidiual documents. Please follow these steps to ensure the links work: (1) Extract the main folder onto your desktop and (2) Enable editing and macros in the excel file.

The DEER Update Plan outlines the process for updates for the 2014 and beyond cycles.

BACKGROUND

D.05-01-055 directed the Energy Division to provide oversight of research and analysis of the energy efficiency values. The Commission placed the updates to DEER under the management of regulatory staff.

In D.05-04-051, the Commission determined that DEER shall be the source of assumptions used to estimate load impacts to the extent possible. 

D.12-05-015 adopted the DEER2011 release for use in planning the 2013-14 energy efficiency program cycle. In R.09-11-014, the Commission also determined that the codes and standards that will become effective in 2014 should be used to update the baseline values during the 2013-14 energy efficiency program cycle. 

UPCOMING AND CURRENT EVENTS

DEER2015

The upcoming DEER2015 code updates will integrate changes outlines in the Code Update document.

DEER2014 Update Release

On November 25, 2013, the CPUC released the latest version of DEER (Database for Energy Efficiency Resources).

 

The DEER update, previously referred to as "DEER2013" will be referenced as "DEER2014" moving forward. The naming convention refers to the year when the updated values become applicable to avoid confusion. Previously, the naming convention refers to the year when the updated values are being published.

 

DEER2014 is an update of DEER2011 required by Codes and Standards (C&S) changes which are effective in 2014. The C&S updates include the California Title 20 Appliance Efficiency Regulations, the California Title 24 Building Energy Efficiency Standards, and the United States Code of Federal Regulations. These C&S updates are incorporated into all energy saving measure definitions and new construction building descriptions for DEER2013.

 

The READI tool to view the database and the update documentation are all available on www.deeresources.com.

 

The latest version of the READI tool  (v1.0.3) include the following changes:

·         Available databases: DEER2014 Code Update, DEER2011, and Ex Ante 13-14 Cycle (draft combination of DEER2011 and DEER2014)

·         Alerts user which database is being connected on start-up.

·         More fields within the Measure, Energy Impact, and Measure Catalog tables are now linked to their source tables. Double-click on any field that has a blue “highlight” font to get additional information.

·         The “Implementation” tab is now only available for the “Ex Ante 13-14 Cycle” combined database. It has been renamed to “Measure Catalog” to better communicate the function of the table.

o   Measure Catalog entries are based on IOU workpapers and connect all ex ante data to a measure catalog entry.

o   A field specifying the start date of the catalog entry has been added. This allows a reference to a Measure Catalog ID to have different linked values based on a reference date.

o   A field specifying the Measure Impact Qualifier has been added.

o   Double-click on a row of the Measure Catalog list to create a table of all ex ante values associated with the entry.

 

DEER2013 Timeline

14 November 2013 - Staff will provide DEER2013 Lightning Adjustment Tables for IOUs to review on formatting.

 

19 November 2013 – Staff and IOUs will discuss and review IOUs’ workpaper catalog to assess 2013 code updates strategy during the ED-IOU technical call.

 

25 November 2013 – DEER2013 will be finalized with all changes, including additions of Non-DEER lighting measures, occupancy sensor scenarios, measure energy impact table, and lighting adjustment tables (one for occupancy sensors and one for weather file updates).

Final documentation and READI tool will be posted on www.DEERESOURCES.com.              

 

A timeline for milestones and deadlines for December and 2014 will be finalized and provided in the next few weeks.

 

DEER2013 Update Follow-Up  Webinar

 

To All Parties in R.09-11-014 and A.12-07-001 et al:

 

One of the actions that came out of the 9/18 webinar for DEER2013 Update it to provide the IOUs with flat Excel workbooks of the two different version of DEER2013.

 

The workbooks can be downloaded here: http://www.deeresources.com/index.php?option=com_content&view=article&id=72&Itemid=63 under DEER2013 Documentation and Resources.

 

Please compare the two versions and provide recommendations on the update scope.

DEER2013 Update Webinar 

 

To All Parties in R.09-11-014 and A.12-07-001 et al:

 

The final draft version for DEER2013 mid cycle updates are now posted on www.deeresources.com.

You can also click here to access the model and supporting documentation.

 

Two DEER2013 version are published currently.

1.       DEER2013 is an update draft that integrates all code changes.

2.       DEER2013 Alternate is an update draft that integrates all code changes EXCEPT weather file updates.

 

Supporting documentation for both versions and an HVAC interactive effects workbook are posted as resources.

 

In addition, the new READI tool can now open DEER2011, DEER2013, and DEER2013 Alt. for comparing values.

 

Stakeholder Workshop

To All Parties in R.09-11-014 and A.12-07-001 et al:

On July 17, 2013, the CPUC will hold a workshop to present the DEER 2013 and DEER 2014 update process and present proposed methodologies and values for the DEER 2013 update.

DEER Workshop Agenda

DEER 2013 Update Draft

 

DEER 2014 Update Draft

 

 

Non-DEER Workpaper Values for Energy Efficiency Measures

Program administrators and implementers develop non-DEER workpapers for measures that are not captured in DEER. Potential energy savings estimates are calculated based on best available information and extrapolation from DEER values or methods, as appropriate. Program administrators submit workpapers to the Energy Division for review on specific non-DEER measures. The Energy Division reviews a sub-selection of the submissions and releases dispositions with adjusted values, if needed.   

BACKGROUND

Development, review and approval of non-DEER workpapers has evolved through several decisions. D.09-09-047 gave Energy Division authority to review and approve non-DEER workpapers and required Energy Division to develop a process for submittal, review and freezing of non-DEER measures.  During the 2010-2012 program cycle, an administrative law judge ruling dated 11/18/2009 in A.08-07-021 provided a standardized review and approval process for Phase 2 non-DEER workpapers including:

  •         Requirements for utilizing DEER values and methods in the development of non-DEER measures.
  •         A timeline for workpaper review that required Commission staff to perform a preliminary review for additional information within 15 days and the final review within 25 days of receiving the additional review.
  •         A requirement for consideration of the latest evaluation, measurement and verification published studies in the development of ex ante values including energy impacts, cost data, effective useful life, remaining useful life, and net-to-gross ratios.
  •         Provision for retrospective staff reviews of frozen and workpapers not reviewed if the measures covered by a workpaper eventually become high-impact measures, measures with the largest amount of energy savings claimed by investor-owned utilities.
  •         D.10-04-029 approved Application 08-07-021 and required investor-owned utilities to cooperate with energy division to allow upfront consultation regarding workpapers.  D.11-07-030 approved all of Application 08-07-021 in regards to Phase 2 review, except the provision for retrospective staff review, which was then removed.

D.12-05-015 is the guidance decision covering 2013-2014 energy efficiency applications and includes a process for workpaper review that builds upon the process established in the previous decisions. D.12-05-015 included the following requirements:

  •          Ex ante values shall be updated in consideration of 2006-2008 evaluation results.
  •         Utilities shall include workpapers in their initial 2013-2014 applications for all measures that are not specifically included in the DEER database.  (NOTE: Staff and utilities refer to workpapers submitted with the initial 2013-2014 applications as “Phase 1” workpapers.)
  •         Update and review of workpapers shall be given to High Impact Measures.
  •         If Staff is unable to review all workpapers submitted with the initial 2013-2014 workpapers, the un-reviewed workpapers shall receive “interim approval,” and Staff may review any of these in the future, with revisions applied prospectively.
  •         A mid-cycle review is included that prescribes a process for reviewing any workpapers that have interim approval as well as any Phase 2 workpapers that are submitted during the cycle.
  •         New non-DEER measures may be added during the program cycle. Staff may assign new non-DEER measures “interim approval” prior to the completion of any necessary research.
  •         A Phase 2 submission and review process is included that limits the time for staff review of workpapers and does not allow the use of the disposition of “conditional approval” that was previously allowed under D.11-07-030.
  •         Every six months Commission Staff will develop a draft resolution covering any disputed workpapers that will be subject to a Commission vote.

Custom Measures and Projects

Custom measures and projects are site-specific energy efficiency projects. Custom projects require unique calculations for each project, as they do not rely on fixed DEER or workpaper values.  For custom measures and projects the ex ante values cannot be forecasted in advance since the preliminary ex ante values are not known until the project is identified.  Final ex ante values are not developed until the project is completed.  Commission Decision 11-07-030 establishes a clear process by which ex ante energy savings estimates from custom measures and projects are reviewed.

BACKGROUND

D.11-07-030 approves that the Energy Division custom project ex ante review process is reasonable and should be adopted. Attachment B of the filing details how the investor-owned utilities’ energy savings claims will be reviewed:

  •         Under the General Review process, the Energy Division will review tools, measures, and projects, as well as inputs to the tools for selected projects. The tool reviews will be done on a prospective basis.
  •        The Pre-Installation Review process allows the Energy Division to perform a parallel review process with the investor-owned utilities, and then allows for the Energy Division to provide inputs and recommendations.
  •         The Post-Installation Review process is used to provide the Energy Division with opportunity to review the accuracy of energy savings claims assumed by the investor-owned utility prior to the utility making its final incentive payment to its customer.
  •         Under the Investor-Owned Utility Claim Review process, the Energy Division conducts a review of energy savings for custom projects to ensure that recommendations made by Energy Division were accurately reflected in the claim.

Customer process guidance documents can be found on this page: http://www.cpuc.ca.gov/PUC/energy/Energy+Efficiency/Ex+Ante+Review+Custom+Process+Guidance+Documents.htm.

  

Last Modified: 7/8/2014


 
 
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