SOUTHERN CALIFORNIA EDISON COMPANY

UNITED STATES OF AMERICA BEFORE THE FEDERAL ENERGY REGULATORY COMMISSION Southern California Edison Company ) Docket No. ER17- -000 SOUTHERN CALIFORNIA EDISON COMPANY ANNUAL UPDATE FILING OF THE TRANSMISSION ACCESS CHARGE BALANCING ACCOUNT ADJUSTMENT MARCH 2017

Karen Koyano Principal Manager FERC Rates & Compliance March 30, 2017 Ms. Kimberly D. Bose, Secretary Federal Energy Regulatory Commission 888 First Street, N.E. Washington, DC 20426 Dear Ms. Bose: Pursuant to Section 35.13 of the Federal Energy Regulatory Commission's ( Commission ) Regulations under the Federal Power Act (18 CFR 35.13), Southern California Edison Company ( SCE ) tenders for filing revisions to its Transmission Owner Tariff ("TO Tariff"), FERC Electric Tariff, Volume No. 6, to update the Transmission Access Charge Balancing Account Adjustment ( TACBAA ) Rate to be effective June 1, 2017. The documents submitted with this filing consist of this letter of transmittal and all attachments hereto; a revised Appendix III to the TO Tariff reflecting the revised TACBAA Rate proposed in this filing in both clean and redline formats; the Prepared Direct Testimony of Antonio Ocegueda; the relevant Statements required under the Commission s Regulations; and workpapers supporting the rate revision proposed herein. I. DESCRIPTION OF TACBAA REVISION The TO Tariff specifies, among other things, the rates and charges for transmission access over the California Independent System Operator Corporation ("CAISO") Controlled Grid. 1 One such rate and charge is the TACBAA Rate. The TACBAA is a ratemaking mechanism designed to ensure that the cost-shift amounts billed by the ISO to SCE under the ISO s Transmission Access Charge ( TAC ) structure will be recovered from SCE s End-Use Customers. Section 5.6 of the TO Tariff describes the items to be included in the Transmission 1 Capitalized terms that have not been expressly defined herein have the same meaning as given to them in SCE s TO Tariff. P.O. Box 800 2244 Walnut Grove Ave. Rosemead, CA 91770

Access Charge Balancing Account ( TACBA ) and sets forth the procedure for revising the TACBAA Rate on an annual basis to be effective on June 1. The TACBAA Rate is based on the balance in the TACBA as of the end of February prior to the commencement of the June billing cycle and a forecast of the net annual TAC billings by the CAISO. The revised TACBAA Rate applicable to SCE s End-Use Customers effective June 1, 2017 is negative $0.00100 per kilowatt-hour. This revision represents a larger negative rate from the current negative $0.00012 per kilowatt-hour TACBAA Rate in effect, thereby reducing the overall billing to customers. This decrease in the TACBAA Rate is primarily due to a prior year over-collection in the TACBA. SCE s proposed decrease to the TACBAA Rate is described in the Prepared Testimony included with this filing. II. REVENUE DECREASE The forecast annualized transmission revenue decrease resulting from the implementation of the revised TACBAA Rate by retail rate group effective June 1, 2017 is shown in the table below. The decrease to the TACBAA Rate does not affect any wholesale customers under SCE s TO Tariff. TACBAA Rate Revenue Change ($) Domestic -24,504,949 Lighting, Small & Medium Power -25,010,846 Large Power -20,324,004 Agricultural & Pumping -2,892,410 Street Lighting -658,506 Total -73,390,715 The revenue forecast by month is set forth in Statements BG and BH.

III. REQUESTED ACTION AND EFFECTIVE DATE SCE respectfully requests that the revised TACBAA Rate proposed herein be accepted and made effective on June 1, 2017. IV. OTHER FILING REQUIREMENTS No expenses or costs included in the rates tendered herein have been alleged or judged in any administrative or judicial proceeding to be illegal, duplicative or unnecessary costs that are demonstrably the product of discriminatory employment practices. SCE believes that the information contained in this filing provides a sufficient basis upon which to accept this filing; however, to the extent necessary, SCE further requests that the Commission waive its filing requirements contained in Part 35 of its regulations to the extent necessary in order to permit this filing to be made effective as requested. SCE believes this filing conforms to any rule of general applicability and to any Commission order specifically applicable to SCE, and has made copies of this letter and all enclosures available for public inspection in SCE's principal office located in Rosemead, California. SCE has mailed copies of this filing to the California Public Utilities Commission and the CAISO.

FEDERAL ENERGY REGULATORY COMMISSION MAILING LIST ANNUAL TACBAA UPDATE FILING NAME Arocles Aguilar General Counsel California Public Utilities Commission ADDRESS 505 Van Ness Avenue San Francisco, California 94102 Arocles.Aguilar@cpuc.ca.gov Anthony Ivancovich Deputy General Counsel - Regulatory California Independent System Operator Corporation 250 Outcropping Way Folsom, California 95630 aivancovich@caiso.com

REVISIONS TO TRANSMISSION OWNER TARIFF (IN CLEAN FORMAT)

APPENDIX III TRANSMISSION RATES FOR END-USE SERVICE Base transmission rates for service to End-Use Customers shall be determined pursuant to the formula rate in Appendix IX. SCE shall post the base transmission rates applicable to each End-User rate schedule on its website: www.sce.com. In addition, the following transmission rates shall apply to service provided to End-Use Customers: A TRBAA Rate of ($0.00129)/kWh shall apply to all End-User rate schedules A TACBAA Rate of ($0.00100)/kWh shall apply to all End-User rate schedules Tariff Record Proposed Effective Date: 06/01/2017 Version Number: 14.0.0 Option Code: A

REVISIONS TO TRANSMISSION OWNER TARIFF (IN REDLINE FORMAT)

Southern California Edison Company FERC Electric Tariff, Third Revised Volume No. 6 APPENDIX III TRANSMISSION RATES FOR END-USE SERVICE Base transmission rates for service to End-Use Customers shall be determined pursuant to the formula rate in Appendix IX. SCE shall post the base transmission rates applicable to each End-User rate schedule on its website: www.sce.com. In addition, the following transmission rates shall apply to service provided to End-Use Customers: A TRBAA Rate of ($0.00129)/kWh shall apply to all End-User rate schedules A TACBAA Rate of ($0.00100012)/kWh shall apply to all End-User rate schedules Tariff Record Proposed Effective Date: 01/01/201706/01/2017 Version Number: 1314.0.0 Option Code: A

UNITED STATES OF AMERICA BEFORE THE FEDERAL ENERGY REGULATORY COMMISSION Southern California Edison Company ) Docket No. ER17- -000 PREPARED DIRECT TESTIMONY OF ANTONIO OCEGUEDA ON BEHALF OF SOUTHERN CALIFORNIA EDISON COMPANY 1 2 3 4 5 6 7 8 9 10 11 12 13 14 QUALIFICATIONS Q. Please state your name and business address for the record. A. My name is Antonio Ocegueda, and my business address is 8631 Rush Street, Rosemead, California 91770-3714. Q. Briefly describe your present responsibilities at the Southern California Edison Company ( SCE or Company ). A. I am a Senior Project Manager in the FERC Rates and Regulation Division of the Regulatory Affairs Department. My primary responsibilities include developing costs and rates for services that are under the jurisdiction of the Federal Energy Regulatory Commission ( FERC ). Q. Briefly describe your educational and professional background. A. I received a Bachelor of Science degree in Mechanical Engineering from Loyola Marymount University in May 1999. I received a Master of Planning degree from the University of Southern California in May 2003.

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 In December 2003, I joined SCE as a Contract Manager in the Regulatory Policy and Contracts Division within the Transmission and Distribution Department, where my responsibilities included management of FERCjurisdictional transmission and distribution agreements. In January 2006, I transferred to my current position in what was then the Regulatory Operations Department. Q. Have you testified before the Commission previously? A. Yes. I have submitted testimony in SCE s prior updates to the Transmission Access Charge Balancing Account Adjustment under Docket Nos. ER16-1272 and ER15-1399. I also submitted testimony in SCE s update to its Reliability Services Balancing Account under Docket Nos. ER17-232 and ER15-216. Finally, I submitted testimony in two of SCE s transmission rate case proceedings (Docket Nos. ER08-1343 and ER11-3697). PURPOSE OF TESTIMONY Q. What is the purpose of your testimony in this proceeding? A. The purpose of my testimony is to present SCE s Transmission Access Charge Balancing Account Adjustment ( TACBAA ) Rate proposed to become effective June 1, 2017. 20

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 Q. What is the TACBAA? A. The TACBAA is a ratemaking mechanism, set forth in Section 5.6 of SCE s Transmission Owner Tariff ( TO Tariff ), that ensures that the difference between the billings to SCE by the California Independent System Operator Corporation ( CAISO ) under the CAISO s Transmission Access Charge ( TAC ) rate methodology and revenues recovered from SCE s End-Use Customers ( Net Cost-Shift ) is recovered from End-Use Customers. The Net Cost-Shift is caused by the CAISO billing SCE at its TAC rate which includes all Transmission Revenue Requirements ( TRR ) of Participating Transmission Owners ( Participating TOs ). Whereas SCE s charges to SCE s End-Use Customers is based only on its utility specific rate. Q. How does the TACBAA mechanism operate? A. An integral part of the TACBAA is the Transmission Access Charge Balancing Account ( TACBA ). The TACBA tracks the difference, including interest, between the Net Cost-Shift billings from the CAISO and the revenues received by SCE from End-Use Customers through the assessment of the TACBAA Rate. Under the TO Tariff, the TACBAA Rate is to be updated annually to reflect the accrued balance in SCE s TACBA as of the end of February prior to the commencement of the June billing cycle, plus a forecast of the annual Net Cost-Shift billings by the

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 CAISO to SCE. This mechanism is required because the Net Cost-Shift amount is very difficult to accurately forecast over time, as it is impossible to predict when new Participating TOs will decide to join the CAISO and to estimate the level of their TRRs. The Net Cost-Shift amount billed to SCE by the CAISO under the TAC also can fluctuate greatly due to changing TRRs and Gross Load of the present Participating TOs. Q. Please describe SCE s proposed TACBAA Rate for 2017/2018. A. As shown in Statement BL and Appendix III of the revised TO Tariff, SCE proposes a TACBAA Rate of negative $0.00100 per kwh effective June 1, 2017. This rate is a decrease from the currently-effective TACBAA Rate of negative $0.00012 per kwh. This proposed rate was developed by combining the TACBA over-collection balance of $81.98 million as of February 28, 2017, the current annualized Net Cost-Shift forecast amount of negative $0.55 million, plus an adjustment for franchise fees and uncollectible accounts expense of negative $0.96 million, and dividing that sum by SCE s Gross Load at the meter for the twelve-month period ended February 28, 2017. Q. How did you develop the Net Cost-Shift forecast for 2017? A. I relied upon the CAISO s latest TAC rate calculation, posted on the CAISO s website. 1 1 A copy of the CAISO s calculation is included in the workpapers for this filing.

1 2 Q. Does this conclude your testimony? A. Yes.

COST OF SERVICE STATEMENTS AH, BD, BG, BH, BK, AND BL

Statement AH Page 1 of 1 Southern California Edison Company Operation and Maintenance Expenses (Transmission Access Charge Billings)* Period II June 2017 through May 2018 Line No. Month Net TAC Billing 1 June ($45,975) 2 July ($45,975) 3 August ($45,975) 4 September ($45,975) 5 October ($45,975) 6 November ($45,975) 7 December ($45,975) 8 January ($45,975) 9 February ($45,975) 10 March ($45,975) 11 April ($45,975) 12 May ($45,975) 13 14 SubTotal ($551,697) 15 * Net Transmission Access Charges are recorded in Account 566.

Statement BD Page 1 of 1 Southern California Edison Company Allocation Energy and Supporting Data Period II June 2017 through May 2018 Monthly Energy Use by End-Use Customer Group (MWh)* Lighting, Small Agricultural Street Line No. Month Domestic & Medium Power Large Power & Pumping Lighting Total 1 June 2,443,775 2,220,188 1,834,143 191,241 64,516 6,753,863 2 July 1,935,759 1,970,187 1,695,845 172,171 61,397 5,835,360 3 August 2,256,571 2,377,577 1,940,190 226,275 65,014 6,865,626 4 September 1,786,090 2,009,964 1,752,410 221,272 60,688 5,830,423 5 October 2,031,226 2,428,670 1,962,714 288,623 61,730 6,772,963 6 November 2,233,460 2,487,739 2,035,667 341,751 61,180 7,159,797 7 December 2,583,434 2,481,334 1,912,739 353,910 58,935 7,390,352 8 January 3,084,531 2,885,121 2,235,333 403,500 61,335 8,669,819 9 February 2,867,837 2,603,028 1,955,066 343,783 60,568 7,830,281 10 March 2,384,416 2,533,036 2,031,827 305,212 63,034 7,317,525 11 April 2,010,398 2,274,934 1,897,690 241,339 64,051 6,488,413 12 May 2,229,037 2,149,638 1,841,834 197,752 65,855 6,484,116 13 14 Total 27,846,533 28,421,416 23,095,459 3,286,829 748,302 83,398,539 15 16 * Monthly Energy use at meter.

Statement BG Page 1 of 1 Southern California Edison Company Statement of Proposed Rate Revenues* Period II June 2017 through May 2018 Monthly TACBAA Revenue by End-Use Customer Group Lighting, Small Agricultural Street Total Line No. Month Domestic & Medium Power Large Power & Pumping Lighting TACBAA 1 June ($2,443,775) ($2,220,188) ($1,834,143) ($191,241) ($64,516) ($6,753,863) 2 July ($1,935,759) ($1,970,187) ($1,695,845) ($172,171) ($61,397) ($5,835,360) 3 August ($2,256,571) ($2,377,577) ($1,940,190) ($226,275) ($65,014) ($6,865,626) 4 September ($1,786,090) ($2,009,964) ($1,752,410) ($221,272) ($60,688) ($5,830,423) 5 October ($2,031,226) ($2,428,670) ($1,962,714) ($288,623) ($61,730) ($6,772,963) 6 November ($2,233,460) ($2,487,739) ($2,035,667) ($341,751) ($61,180) ($7,159,797) 7 December ($2,583,434) ($2,481,334) ($1,912,739) ($353,910) ($58,935) ($7,390,352) 8 January ($3,084,531) ($2,885,121) ($2,235,333) ($403,500) ($61,335) ($8,669,819) 9 February ($2,867,837) ($2,603,028) ($1,955,066) ($343,783) ($60,568) ($7,830,281) 10 March ($2,384,416) ($2,533,036) ($2,031,827) ($305,212) ($63,034) ($7,317,525) 11 April ($2,010,398) ($2,274,934) ($1,897,690) ($241,339) ($64,051) ($6,488,413) 12 May ($2,229,037) ($2,149,638) ($1,841,834) ($197,752) ($65,855) ($6,484,116) 13 14 Total ($27,846,533) ($28,421,416) ($23,095,459) ($3,286,829) ($748,302) ($83,398,539) * The proposed TACBAA Rate is -0.001 $/kwh

Statement BH Page 1 of 1 Southern California Edison Company Statement of Present Rate Revenues* Period II June 2017 through May 2018 Monthly TACBAA Revenue by End-Use Customer Group Lighting, Small Agricultural Street Total Line No. Month Domestic & Medium Power Large Power & Pumping Lighting TACBAA 1 June ($293,253) ($266,423) ($220,097) ($22,949) ($7,742) ($810,464) 2 July ($232,291) ($236,422) ($203,501) ($20,661) ($7,368) ($700,243) 3 August ($270,788) ($285,309) ($232,823) ($27,153) ($7,802) ($823,875) 4 September ($214,331) ($241,196) ($210,289) ($26,553) ($7,283) ($699,651) 5 October ($243,747) ($291,440) ($235,526) ($34,635) ($7,408) ($812,756) 6 November ($268,015) ($298,529) ($244,280) ($41,010) ($7,342) ($859,176) 7 December ($310,012) ($297,760) ($229,529) ($42,469) ($7,072) ($886,842) 8 January ($370,144) ($346,215) ($268,240) ($48,420) ($7,360) ($1,040,378) 9 February ($344,140) ($312,363) ($234,608) ($41,254) ($7,268) ($939,634) 10 March ($286,130) ($303,964) ($243,819) ($36,625) ($7,564) ($878,103) 11 April ($241,248) ($272,992) ($227,723) ($28,961) ($7,686) ($778,610) 12 May ($267,484) ($257,957) ($221,020) ($23,730) ($7,903) ($778,094) 13 14 Total ($3,341,584) ($3,410,570) ($2,771,455) ($394,420) ($89,796) ($10,007,825) * The currently effective TACBAA Rate is -0.00012 $/kwh

Statement BK Page 1 of 1 Southern California Edison Company Electric Utility Cost of Service Calculation of Revised Transmission Access Charge Balancing Account Adjustment Effective June 1, 2017 Period II June 2017 through May 2018 Line No. Description Total 1 Balance in TACBA on February 28, 2017 ($81,982,715) 2 Including Interest 3 4 Forecast ISO TAC Billings ($551,697) 5 6 Revised TACBAA Before Franchise Fees and ($82,534,412) 7 Uncollectable Accounts 8 9 Adjustment for Franchise Fees and ($958,225) 10 Uncollectable Accounts at 1.161% 11 12 Revised TACBAA For End-Use Customers ($83,492,636)

Southern California Edison Company Rate Design Information Transmission Access Charge Balancing Account Adjustment Rate Period II Effective June 1, 2017 Purpose: The purpose of the TACBAA Rate is to flow-through to End-Use Customers the Transmission Access Charge cost shift billed by the California Independent System Operator Statement BL Page 1 of 1 Line No. Description Total 1 Revised TACBAA For End-Use Customers ($83,492,636) 2 Effective June 1, 2017 3 4 Gross Load (kwh) 83,534,355,000 5 Twelve-months ended February 2017 6 7 TACBAA Rate for End Use Customers ($/kwh) ($0.00100) 8 (Line 1/Line 4)

WORKPAPERS

WORKPAPERS TABLE OF CONTENTS Statement AH 1 Statement BD 7 Statement BK 9 Statement BL 12

March 1, 2017 TAC Rates Based on Filed Annual TRR/TRBA and Load Data TAC Components: Filed HV Utility Filed Annual Gross Specific Rate TAC Rate TAC Amount Annual TRR ($) Load (MWH) ($/MWH) ($/MWH) ($) [1] [2] [3] = [1] / [2] [4] = total [1]/ total [2] [5] = [2] x [4] PG&E $ 632,054,543 87,430,657 7.2292 11.5744 $ 1,011,955,081 SCE $ 1,030,478,735 88,983,449 11.5806 11.5744 $ 1,029,927,676 SDG&E $ 454,149,331 20,824,991 21.8079 11.5744 $ 241,036,224 Anaheim $ 29,782,928 2,507,620 11.8770 11.5744 $ 29,024,131 Azusa $ 3,096,475 257,416 12.0291 11.5744 $ 2,979,429 Banning $ 1,460,226 144,652 10.0947 11.5744 $ 1,674,256 Pasadena $ 15,039,959 1,120,049 13.4279 11.5744 $ 12,963,865 Riverside $ 35,543,842 2,180,985 16.2972 11.5744 $ 25,243,535 Vernon $ 2,985,548 1,181,728 2.5264 11.5744 $ 13,677,761 DATC Path 15 $ 25,457,786 - - 11.5744 $ - Startrans IO $ 3,224,199 - - 11.5744 $ - Trans Bay Cable $ 120,454,400 - - 11.5744 $ - Citizens Sunrise $ 10,573,065 - - 11.5744 $ - Colton $ 4,110,870 372,179 11.0454 11.5744 $ 4,307,739 VEA $ 10,685,478 544,970 19.6075 11.5744 $ 6,307,686 CAISO Total $ 2,379,097,384 205,548,696 11.5744 $ 2,379,097,384 SCE Calculation of Forecast TAC Billings HV Utility Specific Rate ($/MWH) 11.5806 TAC Rate ($/MWH) 11.5744 Difference ($/MWH) (0.0062) Gross Load (MWH) 88,983,449 (at ISO Grid Level) Forecast TAC Billings (Difference x Gross Load) (551,697) 2

March 01, 2017 TAC Rates Based on Filed Annual TRR/TRBA and Load Data TAC Components: Filed HV Annual Utility Filed Gross Specific TAC TAC Annual TRR Load Rate Rate Amount ($) (MWh) ($/MWH) ($/MWH) ($) [1] [2] [3] [4] [5] = [1] / [2] = total [1]/total [2] = ([2]) * [4] PG&E $ 632,054,543 87,430,657 $ 7.2292 $ 11.5744 $ 1,011,955,081 SCE $ 1,030,478,735 88,983,449 $ 11.5806 $ 11.5744 $ 1,029,927,676 SDG&E $ 454,149,331 20,824,991 $ 21.8079 $ 11.5744 $ 241,036,224 Anaheim $ 29,782,928 2,507,620 $ 11.8770 $ 11.5744 $ 29,024,131 Azusa $ 3,096,475 257,416 $ 12.0291 $ 11.5744 $ 2,979,429 Banning $ 1,460,226 144,652 $ 10.0947 $ 11.5744 $ 1,674,256 Pasadena $ 15,039,959 1,120,049 $ 13.4279 $ 11.5744 $ 12,963,865 Riverside $ 35,543,842 2,180,985 $ 16.2972 $ 11.5744 $ 25,243,535 Vernon $ 2,985,548 1,181,728 $ 2.5264 $ 11.5744 $ 13,677,761 DATC Path 15 $ 25,457,786 - $ - $ 11.5744 $ 0 Startrans IO $ 3,224,199 - $ - $ 11.5744 $ 0 Trans Bay Cable $ 120,454,400 - $ - $ 11.5744 $ 0 Citizens Sunrise $ 10,573,065 - $ - $ 11.5744 $ 0 Colton $ 4,110,870 372,179 $ 11.0454 $ 11.5744 $ 4,307,739 VEA $ 10,685,478 544,970 $ 19.6075 $ 11.5744 $ 6,307,686 ISO Total $ 2,379,097,384 205,548,696 $ 2,379,097,384 TAC 01Mar17 Rates_03022017 TAC Rates 01Mar17 Page 1 of 4 as of 3/2/2017 1:58 PM 3

PTO 01 Mar 2017 ISO Access Charge Rate HIGH VOLTAGE AND LOW VOLTAGE COMPONENTS Info Only Total HV Total LV Combined Filed TRR Filed TRR TRR Base TRR 772,911,383 932,729,484 1,705,640,867 TRBAA (137,154,623) (53,259,629) (190,414,252) Standby Credit (3,702,217) (4,376,889) (8,079,106) Total 632,054,543 875,092,966 1,507,147,509 SDG&E SCE PG&E Vernon Anaheim Azusa Gross Load 87,430,657 87,430,657 87,430,657 Utility Specific Access Charges ($/MWh) 7.2292 10.0090 17.2382 TRR - Eff. Date - Docket# TRBA - Eff. Date - Docket# Base TRR 1,146,928,287 35,653,241 1,182,581,528 TRBAA (109,723,089) (645,667) (110,368,756) Standby Credit (6,726,463) (209,098) (6,935,561) Total 1,030,478,735 34,798,476 1,065,277,211 Gross Load 88,983,449 88,983,449 88,983,449 Utility Specific Access Charges ($/MWh) 11.5806 0.3911 11.9716 TRR - Eff. Date - Docket# TRBA - Eff. Date - Docket# 1/1/2017 ER11-3697 1/1/2017 ER17-250 Base TRR 492,206,000 303,290,000 795,496,000 TRBAA (31,191,079) (1,923,958) (33,115,037) Standby Credit (6,865,590) (4,230,474) (11,096,064) Total 454,149,331 297,135,568 751,284,899 Gross Load 20,824,991 20,824,991 20,824,991 Utility Specific Access Charges ($/MWh) 21.8079 14.2682 36.0761 TRR - Eff. Date - Docket# TRBA - Eff. Date - Docket# 1/1/2016 - ER16-445 1/1/2017 ER17-279 Base TRR 3,033,164 3,033,164 TRBAA (47,616) (47,616) Standby Credit - - Total 2,985,548 2,985,548 Gross Load 1,181,728 1,181,728 Utility Specific Access Charges ($/MWh) 2.5264 2.5264 TRR - Eff. Date - Docket# TRBA - Eff. Date - Docket# 3/1/2017 ER16-2320 1/1/2017 ER17-39 1/1/2017 NJ17-3 1/1/2017 NJ17-3 Base TRR 30,000,000 30,000,000 TRBAA (217,072) (217,072) Standby Credit - - Total 29,782,928 29,782,928 Gross Load 2,507,620 2,507,620 Utility Specific Access Charges ($/MWh) 11.8770 11.8770 TRR - Eff. Date - Docket# TRBA - Eff. Date - Docket# Base TRR 7/1/2011 ER11-3594 1/1/2017 NJ17-7 3,124,239 3,124,239 TRBAA (27,765) (27,765) Standby Credit - - Total 3,096,475 3,096,475 Gross Load 257,416 257,416 Utility Specific Access Charges ($/MWh) 12.0291 12.0291 TRR - Eff. Date - Docket# TRBA - Eff. Date - Docket# 1/1/2017 NJ17-9 1/1/2017 NJ17-9 TAC 01Mar17 Rates_03022017 01Mar17 Components as of 3/2/2017 1:58 PM 4

PTO Banning Pasadena Riverside DATC Path 15 Startrans IO Trans Bay Cable 01 Mar 2017 ISO Access Charge Rate HIGH VOLTAGE AND LOW VOLTAGE COMPONENTS Info Only Total HV Total LV Combined Filed TRR Filed TRR TRR Base TRR 1,472,610-1,472,610 TRBAA (12,384) - (12,384) Standby Credit - - - Total 1,460,226-1,460,226 Gross Load 144,652 144,652 144,652 Utility Specific Access Charges ($/MWh) 10.0947 0.0000 10.0947 TRR - Eff. Date - Docket# TRBA - Eff. Date - Docket# 1/1/2017 NJ17-6 1/1/2017 NJ17-6 Base TRR 15,168,702 15,168,702 TRBAA (128,743) (128,743) Standby Credit - - Total 15,039,959 15,039,959 Gross Load 1,120,049 1,120,049 Utility Specific Access Charges ($/MWh) 13.4279 13.4279 TRR - Eff. Date - Docket# TRBA - Eff. Date - Docket# Base TRR 11/21/2016 ER17-392 01/1/2017 NJ17-4 35,792,333 35,792,333 TRBAA (248,491) (248,491) Standby Credit - - Total 35,543,842 35,543,842 Gross Load 2,180,985 2,180,985 Utility Specific Access Charges ($/MWh) 16.2972 16.2972 TRR - Eff. Date - Docket# TRBA - Eff. Date - Docket# Base TRR 25,925,000 25,925,000 TRBAA (467,214) (467,214) Standby Credit - - Total 25,457,786 25,457,786 Gross Load - - Utility Specific Access Charges ($/MWh) 0.0000 0.0000 TRR - Eff. Date - Docket# TRBA - Eff. Date - Docket# Base TRR 05/17/2014 ER14-1332 1/1/2017 ER17-271 3,330,000 3,330,000 TRBAA (105,801) (105,801) Standby Credit - - Total 3,224,199 3,224,199 Gross Load - - Utility Specific Access Charges ($/MWh) 0.0000 0.0000 TRR - Eff. Date - Docket# TRBA - Eff. Date - Docket# Base TRR 121,823,486 9,310,514 131,134,000 TRBAA (1,369,086) (16,622) (1,385,708) Standby Credit - - - Total 120,454,400 9,293,892 129,748,292 Gross Load - 87,430,657 - Utility Specific Access Charges ($/MWh) 0.0000 0.1063 0.0000 TRR - Eff. Date - Docket# TRBA - Eff. Date - Docket# 1/1/2017 NJ17-5 1/1/2017 NJ17-5 1/6/2016 ER16-2192 1/1/2017 ER17-272 12/17/2013 ER13-2412 1/1/2017 ER17-639 TAC 01Mar17 Rates_03022017 01Mar17 Components as of 3/2/2017 1:58 PM 5

PTO Citizens Sunrise 01 Mar 2017 ISO Access Charge Rate HIGH VOLTAGE AND LOW VOLTAGE COMPONENTS Info Only Total HV Total LV Combined Filed TRR Filed TRR TRR Base TRR 10,808,380-10,808,380 TRBAA (235,315) - (235,315) Standby Credit - - - Total 10,573,065-10,573,065 Gross Load - - - Utility Specific Access Charges ($/MWh) 0.0000 0.0000 0.0000 TRR - Eff. Date - Docket# TRBA - Eff. Date - Docket# 6/1/2016 ER16-1787 1/1/2017 ER17-148 Base TRR 4,171,734-4,171,734 TRBAA (60,865) - (60,865) Standby Credit - - - Total 4,110,870-4,110,870 Colton VEA Gross Load 372,179-372,179 Utility Specific Access Charges ($/MWh) 11.0454 0.0000 11.0454 TRR - Eff. Date - Docket# TRBA - Eff. Date - Docket# 1/1/2017 NJ17-8 1/1/2017 NJ17-8 Base TRR 10,886,590 3,413,410 14,300,000 TRBAA (201,112) - (201,112) Standby Credit - - - Total 10,685,478 3,413,410 14,098,888 Gross Load 544,970 544,970 544,970 Total CAISO Grid Utility Specific Access Charges ($/MWh) 19.6075 6.2635 25.8709 TRR - Eff. Date - Docket# TRBA - Eff. Date - Docket# 1/1/2013 ER13-49 1/1/2017 ER17-693 For Information Only Base TRR 2,677,581,908 1,284,396,649 3,961,978,557 TRBAA (281,190,255) (55,845,876) (337,036,131) Standby Credit (17,294,270) (8,816,461) (26,110,731) Total 2,379,097,384 1,219,734,312 3,598,831,696 Gross Load 205,548,696 Utility Specific Access Charges ($/MWh) 11.5744 TAC 01Mar17 Rates_03022017 01Mar17 Components as of 3/2/2017 1:58 PM 6

2017 Sales Forecast Customer Group Monthly (MWh) Base Forecast Lighting, Small Agricultural Street Line No. Month Domestic & Medium Power Large Power & Pumping Lighting Total 1 June 2,469,046 2,230,816 1,839,083 192,659 64,518 6,796,123 2 July 1,961,829 1,979,009 1,700,377 174,054 61,398 5,876,668 3 August 2,294,296 2,387,356 1,945,367 228,138 65,015 6,920,171 4 September 1,856,694 2,020,865 1,757,087 224,099 60,690 5,919,434 5 October 2,105,518 2,438,486 1,967,922 291,383 61,731 6,865,040 6 November 2,344,630 2,497,689 2,039,480 343,656 61,182 7,286,636 7 December 2,670,422 2,490,211 1,915,789 355,783 58,936 7,491,141 8 January 3,134,796 2,892,261 2,237,895 404,683 61,335 8,730,970 9 February 2,932,436 2,612,678 1,958,725 345,404 60,570 7,909,812 10 March 2,449,215 2,540,082 2,035,008 305,875 63,034 7,393,215 11 April 2,049,571 2,282,224 1,900,458 241,374 64,051 6,537,678 12 May 2,256,808 2,157,929 1,845,504 199,992 65,855 6,526,088 13 14 Total 28,525,261 28,529,608 23,142,692 3,307,100 748,315 84,252,977 NEM Adjustment Lighting, Small Agricultural Street Line No. Month Domestic & Medium Power Large Power & Pumping Lighting Total 1 June -25,272-10,629-4,940-1,418 (2) -42,260 2 July -26,070-8,822-4,531-1,883 (1) -41,308 3 August -37,725-9,779-5,176-1,863 (1) -54,545 4 September -70,604-10,901-4,677-2,827 (2) -89,011 5 October -74,292-9,816-5,208-2,760 (1) -92,077 6 November -111,171-9,950-3,812-1,905 (1) -126,839 7 December -86,988-8,877-3,050-1,873 (1) -100,789 8 January -50,265-7,141-2,562-1,183 (1) -61,151 9 February -64,599-9,650-3,659-1,621 (2) -79,531 10 March -64,799-7,046-3,181-663 (1) -75,690 11 April -39,173-7,290-2,767-35 (0) -49,265 12 May -27,771-8,291-3,670-2,240 (0) -41,972 13 14 Total -678,728-108,192-47,233-20,271-13 -854,438 New NEM Adjusted Sales Forecast Lighting, Small Agricultural Street Line No. Month Domestic & Medium Power Large Power & Pumping Lighting Total 1 June 2,443,775 2,220,188 1,834,143 191,241 64,516 6,753,863 2 July 1,935,759 1,970,187 1,695,845 172,171 61,397 5,835,360 3 August 2,256,571 2,377,577 1,940,190 226,275 65,014 6,865,626 4 September 1,786,090 2,009,964 1,752,410 221,272 60,688 5,830,423 5 October 2,031,226 2,428,670 1,962,714 288,623 61,730 6,772,963 6 November 2,233,460 2,487,739 2,035,667 341,751 61,180 7,159,797 7 December 2,583,434 2,481,334 1,912,739 353,910 58,935 7,390,352 8 January 3,084,531 2,885,121 2,235,333 403,500 61,335 8,669,819 9 February 2,867,837 2,603,028 1,955,066 343,783 60,568 7,830,281 10 March 2,384,416 2,533,036 2,031,827 305,212 63,034 7,317,525 11 April 2,010,398 2,274,934 1,897,690 241,339 64,051 6,488,413 12 May 2,229,037 2,149,638 1,841,834 197,752 65,855 6,484,116 13 14 Total 27,846,533 28,421,416 23,095,459 3,286,829 748,302 83,398,539 8

OPERATION OF TACBA March April May June July August September October November December January February 2016 2016 2016 2016 2016 2016 2016 2016 2016 2016 2017 2017 BEGINNING BALANCE (13,976,358.39) (29,432,473.09) (41,580,713.59) (53,959,682.36) (60,524,664.01) (60,597,077.63) (59,604,550.65) (58,898,657.87) (60,759,965.43) (62,503,521.66) (66,801,562.19) (71,754,278.23) TACBAA Rate Revenues ($8,315,340.23) ($8,029,000.41) (7,868,755.90) ($4,765,948.33) $845,641.31 $1,066,859.37 $903,207.59 $801,407.55 $753,167.52 $795,057.05 $763,864.28 $678,979.84 Adjustment for FF&U (95,418.53) (92,132.78) (90,293.97) (54,689.26) 9,703.73 12,242.21 10,364.31 9,196.15 8,642.60 9,123.28 8,765.34 7,791.29 Net TACBAA Credits (8,219,921.70) (7,936,867.63) (7,778,461.93) (4,711,259.07) 835,937.58 1,054,617.16 892,843.28 792,211.40 744,524.92 785,933.77 755,098.94 671,188.55 HV Charges (Revenue) from CAISO $67,662,525.50 $72,961,632.71 $70,411,395.81 $78,667,570.35 $94,634,030.31 $107,442,453.20 $106,904,440.28 $89,833,489.44 $78,508,565.62 $71,713,607.98 $72,600,956.15 $71,152,010.00 HV Charges (Payment) from CAISO (74,834,151.19) (77,173,005.58) (75,011,902.65) (80,116,713.18) (95,542,381.51) (107,504,543.38) (106,567,407.83) (92,487,008.40) (80,996,646.77) (76,255,541.43) (78,308,771.13) (81,625,995.63) Net TAC Billing from CAISO (7,171,625.69) (4,211,372.87) (4,600,506.84) (1,449,142.83) (908,351.20) (62,090.18) 337,032.45 (2,653,518.96) (2,488,081.15) (4,541,933.45) (5,707,814.98) (10,473,985.63) TAC Refund 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 Under(Over) Collection (15,391,547.39) (12,148,240.50) (12,378,968.77) (6,160,401.90) (72,413.62) 992,526.98 1,229,875.73 (1,861,307.56) (1,743,556.23) (3,755,999.68) (4,952,716.04) (9,802,797.08) ENDING BALANCE (29,367,905.78) (41,580,713.59) (53,959,682.36) (60,120,084.26) (60,597,077.63) (59,604,550.65) (58,374,674.92) (60,759,965.43) (62,503,521.66) (66,259,521.34) (71,754,278.23) (81,557,075.32) AVERAGE BEG/END BAL (21,672,132.09) (35,506,593.34) (47,770,197.98) (57,039,883.31) (60,560,870.82) (60,100,814.14) (58,989,612.79) (59,829,311.65) (61,631,743.55) (64,381,521.50) (69,277,920.21) (76,655,676.77) INTEREST RATE 3.25% 3.46% 3.46% 3.46% 3.50% 3.50% 3.50% 3.50% 3.50% 3.50% 3.50% 3.50% INTEREST (58,695.36) (102,377.34) (137,737.40) (164,465.00) (176,635.87) (175,294.04) (172,053.04) (174,502.16) (179,759.25) (187,779.44) (202,060.60) (223,579.06) ENDING BALANCE (29,426,601.14) (41,683,090.94) (54,097,419.76) (60,284,549.26) (60,773,713.51) (59,779,844.69) (58,546,727.96) (60,934,467.59) (62,683,280.91) (66,447,300.78) (71,956,338.83) (81,780,654.37) Interest in January (202,060.60) Ending Balance (81,982,714.97) 10

A.13-11-003 ALJ/KD1/ar9/jt2/lil Appendix C Southern California Edison Test Year 2015 General Rate Case Net-To-Gross Multiplier Line CPUC No. Description Adopted 1. Revenues 1.00000 2. Uncollectibles Tax Rate 0.00238 3. Uncollectibles Amount Applied 1.00000 4. Uncollectibles Juris. 0.00238 5. Subtotal 0.99762 6. Franchise Fees Tax Rate 0.00910 7. Franchise Fees Amount Applied 1.00000 8. Franchise Fees Juris. 0.00910 9. Subtotal 0.98853 10. Arizona/New Mexico Income Tax Rates 0.00027 11. Other State I.T. Amount Applied 0.98853 12. Other State I.T. Juris. 0.00027 13. Subtotal 0.98826 14. S. I. T. Rate 0.08840 15. S. I. T. Amount Applied 0.98853 16. S. I. T. Juris. 0.08739 17. Subtotal 0.90087 18. Federal Income Tax 0.35000 19. Federal Income Tax Amount Applied 0.98826 20. Federal Income Tax Juris. 0.34589 21. Net Operating Revenues 0.55498 22. Uncollectible and Franchise Fees Factor 1.01161 23. State & Federal CompositeTax Factor 1.67567 24. N-T-G MULTIPLIER 1.8019 11-26 -

DPB 4194 CORPORATE REVENUE REPORTING INFORMATION SYSTEM OPERATING REPORT February 2017 KWH SALES (000) CURRENT MONTH QUARTER ENDED Q1 INCREASE/(DECREASE) INCREASE/(DECREASE) FROM FROM 2017 2016 % Plan Variance % 2017 2016 % RESIDENTIAL 2,006,559 (15,413) (0.76) 0 0 0.00 AGRICULTURAL 51,192 (14,627) (22.22) 0 0 0.00 COMMERCIAL 3,006,493 (44,347) (1.45) 0 0 0.00 INDUSTRIAL 486,060 (88,007) (15.33) 0 0 0.00 PUBLIC AUTHORITIES - OTHER 250,357 (29,235) (10.46) 0 0 0.00 PUBLIC ST & HIGHWAY LIGHTING 40,173 (5,603) (12.24) 0 0 0.00 PUBLIC AUTH SPECIAL CONTRACTS 15,699 119 0.76 0 0 0.00 RAILROADS & RAILWAYS 1,749 738 73.00 0 0 0.00 INTERDEPARTMENTAL 64 (2) (3.03) 0 0 0.00 SALES TO ULTIMATE CONSUMERS - BILLED 5,858,346 (196,377) (3.24) 5,721,000 137,346 2.40 0 0 0.00 TOTAL ACCRUAL FOR UNBILLED KWH (274,000) (363,000) (*) 219,000 (493,000) (*) 2,842,000 3,707,000 * TOTAL SALES TO ULTIMATE CONSUMERS 5,584,346 (559,377) (9.10) 5,940,000 (355,654) (5.99) 2,842,000 3,707,000 - RESALE SALES (18,195) ### (2,698) (17.41) 94,782 ## (123,402) (56.56) TOTAL KWH SALES 5,566,151 (562,075) (9.17) 2,936,782 3,583,598 * YEAR TO DATE TWELVE MONTHS ENDED INCREASE/(DECREASE) INCREASE/(DECREASE) FROM FROM 2017 2016 % Plan Variance % 2017 2016 % RESIDENTIAL 4,450,122 (3,443) (#) 29,575,785 (705,282) (2.33) AGRICULTURAL 112,856 (26,699) (19.13) 1,691,358 (157,737) (8.53) COMMERCIAL 6,216,386 123,624 2.03 42,312,852 (35,105) (#) INDUSTRIAL 992,892 (137,883) (12.19) 7,023,997 (515,830) (6.84) PUBLIC AUTHORITIES - OTHER 528,767 (25,039) (4.52) 3,949,507 (79,358) (1.97) PUBLIC ST & HIGHWAY LIGHTING 80,897 (11,541) (12.49) 532,522 (13,613) (2.49) PUBLIC AUTH SPECIAL CONTRACTS 30,932 (451) (1.44) 195,664 (5,889) (2.92) RAILROADS & RAILWAYS 8,657 2,617 43.32 86,963 10,136 13.19 INTERDEPARTMENTAL 122 (13) (9.70) 707 (1) (0.14) SALES TO ULTIMATE CONSUMERS - BILLED 12,421,631 (78,828) (0.63) 12,434,000 (12,369) (#) 85,369,355 (1,502,679) (1.73) TOTAL ACCRUAL FOR UNBILLED KWH (451,000) (570,000) (*) (2,139,000) 1,688,000 78.92 (1,835,000) (1,467,000) (*) TOTAL SALES TO ULTIMATE CONSUMERS 11,970,631 (648,828) (5.14) 10,295,000 1,675,631 16.28 83,534,355 (2,969,679) (3.43) RESALE SALES 94,782 (24,414) (20.48) 1,769,702 633,466 55.75 TOTAL KWH SALES 12,065,413 (673,242) (5.29) 85,304,057 (2,336,213) (2.67) # INDICATES LESS THAN 0.1%. * INDICATES OVER 200%. page 1 2017 13

Revenue Change Lighting, Small Agricultural Street Total Domestic & Medium Power Large Power & Pumping Lighting TACBAA PROPOSED ($27,846,533) ($28,421,416) ($23,095,459) ($3,286,829) ($748,302) ($83,398,539) PRESENT ($3,341,584) ($3,410,570) ($2,771,455) ($394,420) ($89,796) ($10,007,825) REV CHG ($24,504,949) ($25,010,846) ($20,324,004) ($2,892,410) ($658,506) ($73,390,715) 14