Vehicle-Grid Integration Communication Protocol Working Group

The CPUC, in collaboration with other state agencies, is developing policies that support vehicle-grid integration (VGI). VGI helps align electric vehicle charging with the needs of the electric grid.To do this, electric vehicles must have capabilities to manage charging or support two-way interaction between vehicles and the grid.

The VGI Working Group assessed how and whether the adoption of a communication protocol is necessary to enable VGI resources to more economically participate in electricity markets at scale. The working group allowed participants to review, understand, and discuss the technical details of existing communication protocols. The outputs of the working group, documented below, will help CPUC determine any requirements necessary for charging station investments the investor-owned utilities make; inform the California Air Resources Board SB 454 Electric Vehicle Charging Open Access Act activities; and allow the California Energy Commission to understand how to better characterize electric vehicle load and infrastructure flexibility as part of their Integrated Energy Policy Report and investment programs.

 Final Report on VGI Communication Protocol Working Group

  • Draft report for stakeholder comments.
  • Comments are due by March 21, 2018. Reply comments are due on April 4, 2018.
  • Comments should be emailed to the service list of R.13-11-007 and the VGI Communications Protocol Working Group. The working group email list is available here.


Meeting Materials

December 18, 2017 10:00am-4:00pm (In-Person, San Francisco)

  1. Meeting Notes
  2. Agenda
  3. Presentation
  4. Draft VGI Glossary of Terms
  5. NIST Handbook 44 Section 3.40 - Electric Vehicle Fueling Systems
  6. VGI Communication Protocols Working Group Draft Recommendation (December 15, 2017)
  7. VGI Communication Protocols Deliverable 1 Report Draft Outline
  8. Joint Utility-Automaker comments on California VGI Next Steps

December 1, 2017 8:30am-11:30am (WebEx)

  1. Meeting Notes
  2. Agenda
  3. Amended hardware proposal from CPUC, CARB, CAISO, and GO-Biz
  4. Proposal for Protocol Converter outside of the EVSE (Mike Bourton, Kitu)
  5. Clarifications & Recommendations on CPUC-CARB VGI staff proposal from Joint IOU-OEM coalition
  6. Value of V2G in Denmark from Nuvve

November 14, 2017 10am-4pm (In-person, San Francisco)

  1. Meeting Notes
  2. Agenda
  3. Presentation
  4. Stakeholder comments on October 30 Agency Proposal

October 30, 2017 8:30am-11am (meeting ID for WebEx and phone: 923 674 544)

  1. Meeting Summary and Notes
  2. Agenda
  3. Agency Presentation on Proposal for Working Group Next Steps
  4. Agency Proposal for Working Group Next Steps

October 16, 2017 8:30am-11:30am (meeting ID for WebEx and phone: 928 215 208)

  1. Meeting Summary and Notes
  2. Agenda
  3. Presentation
  4. Future Proofing the EVSE: Bridging Communications between Secure End Points (Presentation by Josh McDonald, SCE)

September 18, 2017 (In-Person, Sacramento)

  1. Meeting Summary and Notes  
  2. Agenda
  3. Deliverable 2 Cost-Benefit Template
  4. Draft 6 of the VGI Glossary Presentation (Dean Taylor, SCE)
  5. Requirements Sub-Working Group Final Presentation (Stephanie Palmer, CARB)
  6. Rule 21 and Smart Inverter Working Group Presentation (Josh McDonald, SCE)

August 21, 2017 (WebEx)

  1. Meeting Summary and Notes
  2. Agenda
  3. Revised Workplan (August 16, 2017 version)
  4. Workplan Updates & Accomplishments (Amy Mesrobian, CPUC)
  5. Requirements Update (Stephanie Palmer, ARB)
  6. Costs & Benefits (Noel Crisostomo, CEC)

August 7, 2017 (In-Person, San Francisco)

  1. Meeting Summary and Notes
  2. Agenda
  3. Deliverable 1 Draft
  4. Requirements Presentation (Stephanie Palmer, CARB)
  5. State Regulators/Public Policy Presentation on Value and Deliverable 2 (Noel Crisostomo, CEC)
  6. EV Service Provider & Aggregator Presentation on Value (Alec Brooks, eMotorWerks)
  7. Equipment Manufacturer and Software Developer Presentation on Value (Oleg Logvinov, IoTecha)
  8. Automaker OEM Presentation on Value (Judy Brunson, Mercedes Benz Research and Development North America)
  9. Automaker OEM Presentation on Value (Jeremy Whaling, Honda)
  10. BMW Position Statement on Standards Requirements   

July 24, 2017 (WebEx)

  1. Meeting Summary and Notes
  2. Agenda 
  3. July 24, 2017 Workplan update  
  4. Meeting Presentation
  5. Joint Utility-Automaker comments on July 2017 Workplan update

July 10, 2017 (WebEx)

  1. Meeting Summary and Notes
  2. Agenda
  3. Meeting Presentation (Justin Regnier, Facilitator, and State Agency Staff)
  4. Draft Outline for Deliverable 1
  5. Use Case Requirements Spreadsheet as of July 9, 2017

June 26, 2017 (WebEx)

  1. Meeting Summary and Notes
  2. Agenda  
  3. Introduction and Agenda Presentation (Justin Regnier, Facilitator)
  4. Presentation by Jeremy Whaling on behalf of SCE, PG&E, SDG&E, EPRI, Ford, Nissan, Toyota, Honda, Tesla, Fiat Chrysler, and General Motors
  5. Presentation Updating Progress of Use-Case SubGroup (Mike Bourton, Kitu Systems)
  6. Excel Template for Use-Case Requirement Extraction

June 12, 2017 All day (Sacramento)

  1. Meeting Summary and Notes
  2. Agenda  
  3. Presentation on Terms and Definitions, Third Draft (Dean Taylor, SCE)
  4. Presentation Updating Progress of Use-Case SubGroup (Mike Bourton, Kitu Systems)
  5. Presentation on Mapping Use Cases to Network Architecture (Noel Crisostomo, CEC)
  6. Follow-up email to stakeholders from state agencies providing further clarifications and guidance on next steps

May 30, 2017 (WebEx)

  1. Agenda
  2. Presentation on Terms and Definitions, First Draft (Dean Taylor, SCE)
  3. VGI Working Group Workplan May 30 version

May 15, 2017 (WebEx)

  1. Agenda
  2. Presentation on SCE, PG&E, SDG&E and EPRI Comments on Workplan and Scope (Dean Taylor, SCE)
  3. Presentation on Elaad EV Related Protocol Study
  4. VGI Working Group Workplan Update
  5. Joint Automakers Presentation on VGI Working Group Work Plan
  6. Joint IOU/Automakers Comments on VGI Working Group Work Plan
  7. ChargePoint/Craig Rodine Comments on Work Plan
  8. Mercedes Benz/RDNA Comments on Work Plan
  9. Olivine Comments on Work Plan  
  10. Porsche Comments on Work Plan
  11. Oxygen Initiative Comments on Work Plan 
  12. Envision Comments on Work Plan

April 24, 2017 (San Francisco)

  1. Agenda
  2. Presentation on Working Group procedures and schedule (Justin Regnier, Facilitator)
  3. Presentation by GoBiz on VGI Working Group and VGI in California (Tyson Eckerle, GoBiz)
  4. VGI Communications Protocol Working Group Straw Proposal

Background Documents

The CPUC supported development of the 2014 California Vehicle-Grid Integration Roadmap, which maps a way for state agencies to develop solutions that enable electric vehicles to provide grid services while meeting consumer driving needs. On June 13, 2017, state agencies hosted a joint workshop to provide a status update on the VGI Roadmap, and stakeholders subsequently submitted written comments about the future of the Roadmap.

The CPUC Energy Division Staff’s 2014 whitepaper on Vehicle-Grid Integration has served as the launching point for developing policies that best support VGI. CPUC also provided a presentation to the California Energy Commission in November 2014 about vehicle-to-grid integration use cases and regulatory issues.

The California Energy Commission hosts an annual workshop on current VGI research. State agencies present updates on the progress of technical VGI research, researchers provided details on the current progress of VGI research and demonstration projects, and stakeholders provided feedback on the direction of future research. All workshop materials are available on the CEC website.

On December 7, 2016, the CEC hosted a Vehicle-Grid Integration Communication Standards Workshop to discuss the costs and benefits of adopting and implementing VGI communication standards and how those could affect attainment of the goals established under SB 350 and Executive Order B-16-2012. The recorded webcast and presentations are available on the CEC website.

On December 4, 2013, the CPUC Energy Division held a workshop on Vehicle-to-Grid Integration and Financing. The presentations from that workshop can be accessed below:

Documents Submitted by Stakeholders 

Porsche presentation on Communications between Network Service Provider and Building Energy Management System

The Economics of Battery Energy Storage: How multi-use, customer-sited batteries delivery the most services and value to customers and the grid. Rocky Mountain Institute, September 2015, Authors: Garrett Fitzgerald, James Mandel, Jesse Morris, and Herve Touati.


To contact the sponsoring State Agencies (CPUC, CEC, ARB, CAISO, and GO-Biz) email



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