1. PG&E E-9A/B Rate Update
Sub-Metering Protocol Development
Paul Stith
Principal Consultant – SUM
Vice President, EAA Silicon Valley
Project Green On Ramp Paul Stith
SUM – Sustainable Unlimited Mobility December 10, 2011

2. Project Green On Ramp Paul Stith
SUM – Sustainable Unlimited Mobility December 10, 2011
Page 61
Source PA Consulting – November 15, 2011

3. Our PG&E “Relationship” & EV Purchase
November 2010 – November 2011 Kilowatts Used / Roof not viable for Solar
Project Green On Ramp Paul Stith
SUM – Sustainable Unlimited Mobility December 10, 2011

4. Our PG&E Electric Bills
November 2010 – November 2011 Kilowatts Used / Terrible Roof for Solar
Project Green On Ramp Paul Stith
SUM – Sustainable Unlimited Mobility December 10, 2011

5. PG&E E-9A / E-9B “Experimental” EV Rates
Introduced over a decade ago, only allowed for owners of
registered Electric Vehicles - Time of Use (TOU), Tiered Rates
E-9A = Whole House, One Meter < 350 PG&E Customers
E-9B = Dedicated Meter for EV
+ Household Meter < 40 PG&E Customers
E-9B Allows you to receive TWO baseline allocations
Household can be on any other rate plan
Project Green On Ramp Paul Stith
SUM – Sustainable Unlimited Mobility December 10, 2011

6. PG&E E-9A Current TOU, Tiered Rate
Project Green On Ramp Paul Stith
SUM – Sustainable Unlimited Mobility December 10, 2011

7. PG&E E-9B Current TOU, Tiered Rate
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SUM – Sustainable Unlimited Mobility December 10, 2011

8. PUC July 2011 PG&E Directive
 PG&E Review Only E-9B Rates
 Propose Flat Rate
E-9B = Dedicated Meter for EV + Household Meter
Project Green On Ramp Paul Stith
SUM – Sustainable Unlimited Mobility December 10, 2011

9. Southern California Edison EV Rates June 2011
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SUM – Sustainable Unlimited Mobility December 10, 2011

10. Summer $0.38451 () $0.21431 () $0.11041
PUC July 2011 PG&E Directive Results
Rate A & B
Winter
TOTAL RATES
$0.27932 ( ) $0.17365 ( ) $0.11305
Total Energy Rates ($ per kWh) PEAK PART-PEAK OFF-PEAK
Summer TOTAL RATES
$0.38451 ( ) $0.21431 () $0.11041 ()
Rate A & B
Total Energy Rates ($ per kWh) PEAK PART-PEAK OFF-PEAK
Summer $0.38451 () $0.21431 () $0.11041 ()
Winter $0.27932 () $0.17365 () $0.11305 ()
Total Customer Charge Rate ($ per meter per day) $0.26283
Winter $0.27932 () $0.17365 () $0.11305 ()
Total bundled service charges shown on customer’s bills are unbundled according to
 PG&E Proposed Flat TOU shown below. E-9A AND E-9B
component rates Rates for
 Raised Base Rate from ~5 Cents to ~11 Cents
Total Customer Charge Rate ($ per meter per day) $0.26283
 80% of Existing E-9A/B rate payers will see higher bills
Total bundled service charges shown on customer’s bills are unbundled according to the
Total Customer Charge Rate ($ per meter per below.
component rates shown day) $0.26283
 Some rate payers will be better on standard E1 Plan
 High use bundled service charges shown onwith high 24x7 use may to the
Total accounts, especially customer’s bills are unbundled according
component rates shown below.
actually be better off with proposed rates
Project Green On Ramp
Advice Letter No: Issued by Paul Stith
Date Filed
SUM – Sustainable Unlimited Mobility
Decision No. Brian K. Cherry December 10, 2011
Effective
Vice President Resolution No.

11. PG&E E-9A & E-9B Rate Proposal
- Challenges and Responses -
Activities
 Letter Writing Campaign
 PG&E Response (Can’t sell below cost)
 Letter Writing Campaign – Version 2
 PG&E Response???
Action Items
 Full rate analysis of E1 vs. E9 specific cases
 Request rate freeze until scheduled 2013-2014 analysis
 Analyze other Time of Use Applications & Rates, Marginal Cost Off-Peak
 Examine EVSE Service Provider Rates
 Legislative Support for Residential Subsidies
 Support Sub-Metering Technologies
Project Green On Ramp Paul Stith
SUM – Sustainable Unlimited Mobility December 10, 2011

12. PUC July 2011 Directive – All IOUs
PU1
PG&E, SCE & San Diego Power & Gas
Required to develop a Sub-Metering Protocol MM1
FSubA1
 Isolate EV Charging Load from Primary Load
 Sub-Meter can not be owned by Utility
 Simplify the EV service offerings by segregating use
 Application-specific utility rates to drive charging behavior
 Lower the cost to access application-specific rates
 Expand workplace and multi-family charging
Input from EVSE Providers, Service Providers,
Auto Makers & Consumers
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SUM – Sustainable Unlimited Mobility December 10, 2011

13. Source: Joint IOU Work Groups 11/2011
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SUM – Sustainable Unlimited Mobility December 10, 2011

14. Proposed Joint Utility Submetering Protocol Development Plan Description And Activities
Phase 1 Phase 2 Phase 3 Phase 4
Define / Plan Design / Develop Build Interim Solution Build Scalable Solution
Short-Term Mid-Term Long-Term
CUSTOMER OR 3RD PARTY-OWNED SUBMETERING IS CUSTOMER OR 3RD PARTY-OWNED SUBMETERING IS
AVAILABLE TO CUSTOMERS FOR NON-BILLING AVAILABLE TO CUSTOMERS FOR BILLING PURPOSES
PURPOSES
• Submeters for IOU subtractive billing are • National Standards are in place
• IOU customers may have the choice of residential and several EV rates owned by customers or 3rd parties
• Submeters for subtractive billing are
• IOU customers can continue to use the utility’s single whole house meter, which owned by customers or 3rd parties
DESCRIPTION
includes EV charging and billing • Submeter data for IOU subtractive billing
• Submeter data for IOU subtractive
• IOU customers can add a parallel meter service panel for a dedicated utility-owned to be provided according to protocol
billing to be provided according to
and read parallel meter for EV charging and billing (includes submeter ID, premise ID, and
protocol
date/time stamped interval usage)
• IOU customers can install a submeter, either owned by the customer or a 3rd party, • Utilities execute automated, full scale
and receive usage data from those (non-utility) sources for energy monitoring • Utilities execute manual, small scale
subtractive billing
subtractive billing of EV charging loads
• Full utility cost recovery in place for
• Full utility cost recovery in place for
upgrades to IT/billing systems and
upgrades to IT/billing systems and related
related costs
costs
• Define the CA Submetering Protocol • Develop the California Submetering • Implement a solution - build, test, and refine • Upgrade utility systems to handle
Roadmap Protocol the necessary processes, systems, and system automated, full scale subtractive
- Goals, objectives, scope, guidelines interfaces billing
- Business requirements and specs for
- List of Issues and/or Requirements utilities, customers and 3rd party • Pursue development of national standards for • Leverage utility investments in Smart
and Preliminary Recommendations meter service providers submeters and subtractive billing Grid technologies
ACTIVITIES
- Key tasks or activities and timing for - Technical, security, privacy • Enable 3-way handshake among the utility, • National standards are completed and
each requirements, specs, and standards customer, and 3rd party meter service implemented by this time
- Responsible organizations and aligned with national standards provider
individuals for each
- Architectural design for end-to-end • Develop certification process for 3rd party
• Complete and submit the Submetering systems (including back office devices, systems, processes
Roadmap Report integration)
• Develop and carry out customer information
- Implementation strategy and plan, campaign
schedule, tasks, and deliverables
Project Green On Ramp Source: Joint IOU Work Groups 11/2011 Paul Stith
SUM – Sustainable Unlimited Mobility December 10, 2011
14

15. CPUC Submetering Protocol Timeline
PROTOCOL DEVELOPMENT
TARIFF
ROADMAP DEVELOPMENT DEVELOPMENT
Decision 7.25.2011
AFV OIR Phase 2
Public Submeter Tariff sheet changes to
workshop protocol implement
with external roadmap submetering protocol
stakeholders report
into tariff rules
10/27/11 1/3/2012 * 9/3/2012
9/15/11 11/14/11 7/31/2012 1/2013
IOU joint Workshop Tier 2 advice Decision
meetings with report letter & Closing
CPUC Energy Protocol Proceedings
Division, Report
Automakers,
EVSE
Manufacturers,
and EVSPs * Potential extension to be evaluated
Project Green On Ramp Source: Joint IOU Work Groups 11/2011 Paul Stith
SUM – Sustainable Unlimited Mobility December 10, 2011
15

16. Use Case 1: Fixed Submeter Electricity
Usage Data
Billing
Utility = Electric Commodity Provider (One to One EVSP) Master Meter Usage
Submeter Usage
Customer of Record for the Fixed Submeter is the Premise Owner Premises Usage
Premises 1
PU1 Utility Systems
Stagin
MM1 FSubA Open Back
g
DMA EV Office
FSubA1 Server
AMI
Implications
– Assumes 3rd Party sends data from their Data Management Agent
(DMA) to the utility via the OpenEV interface OpenEV
– Requires 3-way association among customer, 3rd party, and utility
prior to accurate subtractive billing (i.e. no ad-hoc associations)
– Submeter adheres to the same certification and requirements as a
utility master meter based on national standards
– OpenEV standard must be established, and 3rd Party DMA is
certified to it
– AMI network is not used to transport submeter data
Project Green On Ramp Paul Stith
SUM – Sustainable Unlimited Mobility December 10, 2011
16

17. Use Case 2: Fixed Submeter Electricity
Usage Data
Billing
Utility = Electric Commodity Provider (One to Many EVSPs) Master Meter Usage
Submeter Usage
Customer of Record for the Fixed Submeter is the Premise Owner Submeter Usage
Submeter Usage
Premises Usage
Premises 1
Utility Systems
PU1
Staging Back
MM1 FSubA Open Office
Server
FSubA1 DMA EV
FSubA2
FSubA3
FSubB Open
FSubB1 DMA EV
FSubB2
FSubC Open
DMA EV
FSubC1
AMI
Example: shopping center garage with multiple vendors with multiple submetered charging points.
NOTE: Submeter data is not aggregated.
Project Green On Ramp Paul Stith
SUM – Sustainable Unlimited Mobility December 10, 2011
17

18. Use Case 3: Fixed Submeter Electricity
Usage Data
Billing
EVSP = Resells Electricity to Consumer (One to One) Master Meter Usage
Submeter Usage
Customer of Record for the Fixed Submeter is EVSP Premises Usage
Premises 1
Could include
PU1
value-added
services
Utility Systems
MM1 FSubA Open Staging Back
DMA EV Server Office
FSubA1
AMI
Implications
– This arrangement is qualitatively the same as Use Case 1
– Both the premise owner and EVSP are direct tariff customers
of the utility (load serving entity)
– Customer of record for the fixed submeter is the EVSP
– Utility is charging 3rd parties for their usage, and 3rd parties
may recoup their costs in addition to any value-added service
cost
Project Green On Ramp Paul Stith
SUM – Sustainable Unlimited Mobility December 10, 2011
18

19. Mobile Submeters
EVSP = Resells Electricity to Consumer
Customer of Record for Mobile Submeter can be Customer or EVSP
OpenEV
Friday,
2011/9/9
Premises
MM1 Identifier

Association
Saturday,
2011/9/10
Premises
MM2 Identifier MSubA

EV charges at
different
Monday,
Premises each
2011/9/12 day
Premises
MM3 Identifier

Project Green On Ramp Paul Stith
SUM – Sustainable Unlimited Mobility December 10, 2011
19

20. PG&E E-9A/B Rate Update
Sub-Metering Protocol Development
Paul Stith
Principal Consultant – SUM
Vice President, EAA Silicon Valley
Paul.Stith@sum.com
Project Green On Ramp Paul Stith
SUM – Sustainable Unlimited Mobility December 10, 2011