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Proposed Revision Request Detail Help
PRR Life Cycle*****Stakeholder Meeting on Recommendation****
PRR Details
PRR #
1692
Title Day-ahead contingency analysis as a service charge
Date Submitted 7/27/2026 1:59 PM
PRR Category B
Priority Normal
Owner Ahmadi, Massih (CAISO)
Status Stakeholder Meeting on Recommendation
Status End Date 9/16/2026 11:59 PM
Related BPM Settlements and Billing
BPM Section 1 BPMs update associated to this PRR and 1 Settlement’s mainbody v.30 redline and clean version
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Existing Language

​​See BPM attached to this PRR​

Proposed Language

See BPM attached to this PRR​​

Reason For Revision

After deployment of DAME and EDAM, CISO is offering this new service for Market Participants​​

Click here to view the Recommendation Details for this PRR
BPM PRR Submitter

Ahmadi, Massih (CAISO)
Modified BPM language proposed by the PBM Chnage Management Coordinator

​The ISO proposes no modified BPM language beyond that proposed in the BPM PRR.​

Identification of the authorship of comments

Comments were received from Southern Cities.
Action

Approve the BPM PRR as submitted

Approve the BPM PRR as submitted
Statement of apparent requirements of the BPM PRR

This BPM PRR contains basic language changes.
Priority and rank for any BPM PRR requiring a CAISO system change

There were system changes associated with this PRR. The system changes will be implemented on 10/1/26 on normal basis.
Proposed effective date(s) of the BPM PRR

10/01/26
Other recommended actions

N/A
Announcements
No Announcements has been posted for this PRR.
Impact Analysis
PRR 1692 - DAAS - PRR Impact Analysis Form_20260727.doc    
Notes:
Initial Comments
PRR 1692 - 082726_CAISO_Response_To_Comments_PRR1692.docx    
CAISO Response: Day-Ahead Contingency Analysis (DACA) As A Service (“DAAS”) is a subscription-based service the CAISO is offering to active and onboarding EDAM Entities.

DAAS was included in the Feb 6, 2026 Tariff Amendment to Support Implementation of DAME/EDAM Initiative (ER26-1294) filing and approved on April 8th.  DAAS Tariff language is found in Section 33 – Extended Day-Ahead Market, 33.21 Supplemental Services – DACA Services Charge.  Link to public documents:
https://www.caiso.com/library/feb-6-2026-tariff-amendment-support-implementation-of-dame-edam-er26-1294-

The set-up charge is intended to recover the incremental costs associated with initially establishing DAAS for an entity. Because these are implementation-related costs rather than ongoing administrative costs, they are treated separately from the annual administrative fee.

The annual DAAS administrative fee is intended to recover CAISO’s ongoing costs to administer and support the service. The fee was developed based on the expected CAISO resources and activities necessary to provide DAAS and will be reassessed periodically as part of CAISO’s cost-of-service process. The intent is for the fee to reasonably reflect the cost of providing the service rather than have those costs recovered through the broader GMC.

The DAAS fees collected by CAISO are treated as supplemental revenue. Consistent with our cost-of-service approach, the revenue is used to offset the costs otherwise recovered through the GMC. In other words, the intent is not for CAISO to generate incremental earnings from providing DAAS; the fees help ensure that the costs associated with the service are recovered from the entities using it rather than being borne entirely by the broader customer base.
~Massih Ahmadi
8/27/2026 12:01 PM
Logged By - Williamson-Duffney, Joseph (CAISO)
The proposed revisions to the PBM for Settlements and Billing relating to Day-Ahead Contingency Analysis Service (“DAAS”) include billing terminology and general references to invoice processes but do not explain how administrative fees and set-up charges are determined or how related revenues are treated.  In addition, the Six Cities have not been able to find any authority in the CAISO Tariff for the CAISO to provide DAAS service.  The Six Cities request that the CAISO identify tariff authority for this service and explain how DAAS charges are determined and how related revenues received by the CAISO will be treated.
8/18/2026 3:38 PM
Logged By - bblair@thompsoncoburn.com (CAISO)
Recommendation Comments
The Six Cities appreciate the CAISO’s responses to their Initial Comments requesting identification of the tariff authority for the DAAS service and explanation for how DAAS charges will be determined and how related revenues received by the CAISO will be treated.  The CAISO’s response includes a high level description of how DAAS charges will be established and the related revenues credited.  To enhance the completeness and clarity of the BPM revisions related to the DAAS, the Six Cities request that the CAISO include in the BPM the following language from the CAISO’s response: 

The set-up charge is intended to recover the incremental costs associated with initially establishing DAAS for an entity. Because these are implementation-related costs rather than ongoing administrative costs, they are treated separately from the annual administrative fee.

The annual DAAS administrative fee is intended to recover CAISO’s ongoing costs to administer and support the service. The fee was developed based on the expected CAISO resources and activities necessary to provide DAAS and will be reassessed periodically as part of CAISO’s cost-of-service process. The intent is for the fee to reasonably reflect the cost of providing the service rather than have those costs recovered through the broader GMC.

The DAAS fees collected by CAISO are treated as supplemental revenue. Consistent with our cost-of-service approach, the revenue is used to offset the costs otherwise recovered through the GMC. In other words, the intent is not for CAISO to generate incremental earnings from providing DAAS; the fees help ensure that the costs associated with the service are recovered from the entities using it rather than being borne entirely by the broader customer base. 
9/16/2026 2:51 PM
Logged By - bblair@thompsoncoburn.com (CAISO)
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