John C. Frain Director Regulatory Strategy & Revenue Policy

P.O. Box 1475 Baltimore, Maryland 21203-1475

Telephone 410.470.1169 Fax 410.470.8022 www.bge.com john.frain@bge.com

December 15, 2017

Via Electronic Filing

David J. Collins, Executive Secretary

Public Service Commission of Maryland

William Donald Schaefer Tower

6 Saint Paul Street, 16th

Floor

Baltimore, Maryland 21202-6806

Re: Case Nos. 9056/9064; Compliance Filing in Case No. 9221

Supplement No. 612 to P.S.C. Md. E-6

Revisions to Time-of-Use Standard Offer Service Energy Rates and February

2018 Administrative Charges under Rider 1 – Standard Offer Service

Dear Mr. Collins:

Baltimore Gas and Electric Company (BGE) files herewith Supplement 612 to

P.S.C. Md. E-6, BGE’s Retail Electric Service Tariff. Based on results from the October

16, 2017 retail supply procurement bids, the Residential, Type I and Electric Vehicle TOU

SOS Energy rates have been shaped by rating period using June – September 2017

settlement data. The Residential and Type I standard and unshaped TOU rates were

previously approved by the Maryland Public Service Commission in Order No. 88431

issued October 20, 2017 in the above-referenced cases.

Under Rider 1, the SOS Administrative Charges are subject to adjustment in the

February, June and October billing months to reflect the estimated incremental,

uncollectible, and cash working capital costs of providing Residential, Type I, Type II and

Hourly Service. The Company has performed its true-ups of actual incremental,

uncollectible, and cash working capital costs to the estimated costs of providing

Residential, Type I, Type II and Hourly Service. As such, any over- or under-collection of

costs compared to the estimated costs for the program year are included in the projected

Rider 1 rates herein to be effective for the period from February 2018 through May 2018.

Under Rider 1, the SOS Administrative Charges are also subject to an annual

adjustment to the return component. Effective for the period from February 2018 through

January 2019, the Company has adjusted the return component by service type consistent

with Commission Order No. 87891. See Attachment 1 for supporting calculations.

Attachment 1 – Annual Adjustment to the SOS Return Component

Residential Type I Type II Hourly

1 Cash Working Capital (Nov-16 to Oct-17) 77,130$ 4,725$ 9,259$ 657$

2 Short Term Debt Rate (CN 9406), grossed up for franchise tax and PSC assessment 0.45% 0.45% 0.45% 0.45%

3 = 1 x 2 Revenue Requirement at Short Term Debt Rate 347$ 21$ 42$ 3$

4 Pre-tax Rate of Return (CN 9406) 11.13% 11.13% 11.13% 11.13%

5 = 1 x 4 Revenue Requirement at Pre-Tax Rate of Return 8,585$ 526$ 1,030$ 73$

6 = 5 - 3 Incremental Revenue Requirement 8,238$ 505$ 989$ 70$

7 MWH Sales ( Nov-16 to Oct-17) 8,812,859 818,707 1,736,956 172,181

8 = 6 / 7 Rate per KWH 0.00093$ 0.00062$ 0.00057$ 0.00041$

Baltimore Gas and Electric Company

Annual Adjustment to the Return Component of the SOS Administrative Charge

($000 Except per KWH)

Attachment 2 – Rider 1 – Standard Offer Service and Schedule PL (Private

Area Lighting) Rates

Clean and Redlined Tariff Pages

Baltimore Gas and Electric Company – Electric -- Retail 57

P. S. C. Md. -- E-6 (Suppl. 612) Filed 12/15/17 - Effective 02/01/18

PRIVATE AREA LIGHTING – ELECTRIC

SCHEDULE P L

AVAILABILITY: For unmetered outdoor area lighting of private property.

MONTHLY RATES:

1. For supply of controlled electricity installation and maintenance of overhead supplied lamp fixtures and lamp renewals as required for each

Billing Watts Description Rate Mercury Vapor (limited to existing installations) 117 100w MV Pendant $9.35 205 175w MV Pendant 11.37 454 400w MV Pend/Flood 17.28 1,090 1000w MV Pendant 32.54 Sodium Vapor 120 100w SV Flood (limited to existing installations) 10.90 120 100w SV Pendant 9.37

173 150w SV Pendant 10.99 298 250w SV Pendant 18.35 467 400w SV Pend/Flood 19.03 1,130 1000w SV Pendant 50.01 Metal Halide (limited to existing installations) 189 100w MH Pulse Teardrop 26.56 189 150w MH Pulse Pendant 18.35 205 175w MH Pendant 18.35 445 400w MH Spot or Flood 28.79 445 400w MH Pendant 28.48 448 400w MH Pulse Flood/Spot 28.79 448 400w MH Pulse Pendant Gray 28.48 1,090 1000w MH Pend/Flood 47.17 Where longer than 4-foot upsweep arms are required for such lighting supply, add 3.68 For each span of overhead wires required on existing and additional poles 1.60 For the installation and maintenance of overhead-supplied lamp poles – each additional standard distribution wood pole 3.67

2. For supply of controlled electricity installation and maintenance of underground-supplied lamp fixtures and lamp renewals as required for each

Billing Watts Description Rate Mercury Vapor (limited to existing installations) 205 175w MV Modern/Colonial $12.69 454 400w MV Pend/Flood 14.93 Sodium Vapor 120 100w SV Colonial Modern (limited to existing installations) 10.94 120 100w SV Flood (limited to existing installations) 8.65 120 100w SV Gothic 14.64

Continued on Next Page

58 Baltimore Gas and Electric Company – Electric -- Retail

Schedule PL Continued

P. S. C. Md. -- E-6 (Suppl. 612) Filed 12/15/17 - Effective 02/01/18

Billing Watts Description Rate 120 100w SV Acorn 14.68 120 100w SV Acorn Havre de Grace 16.09 120 100w SV Colonial Premiere 15.23 120 100w SV Acorn Maple Lawn 17.63 120 100w SV Pendant 8.65 173 150w SV Modern/Colonial 12.11 173 150w SV Pendant 8.61 173 150w SV Rectilinear 17.75 173 150w SV Acorn 16.34 173 150w SV Gothic 16.34 173 150w SV Acorn Victorian (limited to existing installations) 27.12 173 150w SV Colonial Premiere 16.86 173 150w SV Acorn Havre de Grace 17.76 173 150w SV Acorn Maple Lawn 19.43 173 150w SV Tear Drop 35.37 298 250w SV Pendant 15.35 298 250w SV Tear Drop 45.51 467 400w SV Pend/Flood 16.63 467 400w SV Rectilinear 28.54 1,130 1000w SV Pendant 45.11 Metal Halide (limited to existing installations) 129 100w MH Colonial 15.22 129 100w MH Acorn Maple Lawn 23.36 129 100w MH Acorn Havre de Grace 21.30 129 100w MH Acorn 19.90 129 100w MH Gothic 19.95 129 100w MH Towson – green 23.15 189 150w MH Pulse Acorn Maple Lawn 27.48 189 150w MH Pulse Modern 19.19 189 150w MH Pulse Pendant 17.25 189 150w MH Pulse Acorn 23.04 189 150w MH Pulse Acorn Havre de Grace 24.46 189 150w MH Pulse Colonial 17.88 189 150w MH Pulse Gothic 23.04 189 150w MH Pulse Colonial Premiere 19.61 189 150w MH Pulse Rectilinear 21.86 189 150w MH Pulse Teardrop 26.50 205 175w MH Acorn 23.04 205 175w MH Colonial Premiere 17.88 205 175w MH Up Lighting 29.43 205 175w MH Gothic 23.04 205 175w MH Modern 19.18 205 175w MH Pendant 17.25 205 175w MH Rectilinear 21.89 205 175w MH Acorn Havre de Grace 24.45 205 175w MH Acorn Maple Lawn 27.47 205 175w MH Colonial Premiere 19.60 448 400w MH Pulse Rectilinear 29.70 448 400w MH Pulse Flood 22.68

Continued on Next Page

Baltimore Gas and Electric Company – Electric – Retail 59

P. S. C. Md. -- E-6 (Suppl. 612) Filed 12/15/17 - Effective 02/01/18

Billing Watts Description Rate 448 400w MH Pulse Pendant – Bronze 24.55 448 400w MH Pulse Pendant – Gray 25.15 445 400w MH Flood 22.68 445 400w MH Pendant 24.56 445 400w MH Rectilinear 29.72 445 400w MH Pendant 25.19 1,090 1000w MH Pend/Flood 43.29 1,090 1000w MH Rectilinear 58.94 Where longer than 4-foot upsweep arms are required on 35-foot embedded wood poles for such lighting supply, add 3.65

3. Lamp Fixtures – LED fixtures Billing Watts Description Rate

39 51 72 70 72 72 54 70 52 72 88

104 106 101 101

86 75

129 145 151 157 273 129 256

Light-Emitting Diode* LED 70 Pendant - 39 LED 100 Pendant - 51 LED 100 Pendant - 72 LED 100 Post Top Acorn LED 100 Post Top Arlington LED 100 Post Top Colonial LED 100 Post Top Modern LED 100 Post Top Decorative Acorn LED 100 Premiere Colonial LED 150 Pendant - 72 LED 150 Pendant - 88 LED 150 Post Top Arlington LED 150 Post Top Colonial LED 150 Post Top Acorn LED 150 Post Top Decorative Acorn LED 150 Tear Drop LED 150 Premiere Colonial LED 250 Pendant - 129 LED 250 Pendant - 145 LED 250 Tear Drop LED 400 Pendant - 157 LED 400 Pendant - 273 LED 400 Floodlight LED 1000 Floodlight *LED naming based on HID equivalent lamp watts

9.44 8.18

10.07 25.67 28.79 17.55 16.85 34.90 18.48

9.46 10.56 29.41 18.69 26.26 35.50 33.58 20.45 13.65 14.02 42.92 16.98 20.84 15.24 29.57

4. For the installation and maintenance of underground supplied lamp poles and cables each 12-foot square wood standard embedded post-top pole $15.66 each 12 foot fiberglass pole 15.66 each 12-foot fiberglass pole with shroud 25.70 each 14 foot fiberglass pole 15.66 each 14-foot embedded fiberglass post-top pole 15.66 each 14-foot fiberglass hinged pole 21.65 each 14-foot fluted black fiberglass pole 30.85 each 19-foot underground pole 22.01 each 20-foot round embedded bronze fiberglass pole each 30-foot round bronze finished 24.90 each 23 foot fiberglass pole with shroud 32.79 each 25-foot embedded metal pole 25.99 each 30-foot embedded metal pole 22.01 each 30-foot round embedded bronze fiberglass 26.79 each 30-foot round embedded bronze-fiberglass pole (incl. 1 arm) 29.54

Continued on Next Page

77-A Electric – Retail – Baltimore Gas and Electric Company

P. S. C. Md. – E-6 (Suppl. 612) Filed 12/15/17 – Effective 02/01/18

Energy

Rate

¢/kWh

Admin.

Charge

¢/kWh 1

Applicable

Taxes 2

Total

Generation

Rate

¢/kWh

Transm.

Rate incl.

GRT, PSC

Assess. ¢/kWh

Transm.

Rate incl.

GRT, PSC

Assess. $/kW

Total

Rate

¢/kWh

Total

Rate

$/kW

RESIDENTIAL

Schedule R Feb. 1, 2018 - May 31, 2018 6.894 0.224 0.013 7.131 1.127 - 8.258 - Jun. 1, 2018 - Sep. 30, 2018 6.347 0.224 0.012 6.583 1.127 - 7.710 -

Schedule RL Feb. 1, 2018 - May 31, 2018 On-Peak 8.271 0.224 0.016 8.511 1.033 - 9.544 - Feb. 1, 2018 - May 31, 2018 Int-Peak 7.092 0.224 0.013 7.329 1.033 - 8.362 - Feb. 1, 2018 - May 31, 2018 Off-Peak 6.213 0.224 0.012 6.449 1.033 - 7.482 - Jun. 1, 2018 - Sep. 30, 2018 On-Peak 8.439 0.224 0.016 8.679 1.033 - 9.712 - Jun. 1, 2018 - Sep. 30, 2018 Int-Peak 5.342 0.224 0.010 5.576 1.033 - 6.609 - Jun. 1, 2018 - Sep. 30, 2018 Off-Peak 5.256 0.224 0.010 5.490 1.033 - 6.523 -

Schedule EV Feb. 1, 2018 - May 31, 2018 On-Peak 14.104 0.224 0.026 14.354 4.500 - 18.854 - Feb. 1, 2018 - May 31, 2018 Off-Peak 4.500 0.224 0.008 4.732 - - 4.732 - Jun. 1, 2018 - Sep. 30, 2018 On-Peak 11.256 0.224 0.021 11.501 3.297 - 14.798 - Jun. 1, 2018 - Sep. 30, 2018 Off-Peak 3.821 0.224 0.007 4.052 - - 4.052 -

COMMERCIAL & INDUSTRIAL

Scheds. G/GU -Type I SOS Feb. 1, 2018 - May 31, 2018 6.459 0.240 0.012 6.711 0.853 - 7.564 - Jun. 1, 2018 - Sep. 30, 2018 6.023 0.240 0.011 6.274 0.853 - 7.127 -

Sched. GS - Type I SOS Feb. 1, 2018 - May 31, 2018 On-Peak 8.088 0.240 0.015 8.343 0.735 - 9.078 - Feb. 1, 2018 - May 31, 2018 Int-Peak 6.888 0.240 0.013 7.141 0.735 - 7.876 - Feb. 1, 2018 - May 31, 2018 Off-Peak 5.900 0.240 0.011 6.151 0.735 - 6.886 - Jun. 1, 2018 - Sep. 30, 2018 On-Peak 8.852 0.240 0.017 9.109 0.735 - 9.844 - Jun. 1, 2018 - Sep. 30, 2018 Int-Peak 5.589 0.240 0.010 5.839 0.735 - 6.574 - Jun. 1, 2018 - Sep. 30, 2018 Off-Peak 5.237 0.240 0.010 5.487 0.735 - 6.222 -

Sched. SL - Type I SOS 3 Feb. 1, 2018 - May 31, 2018 5.193 0.240 0.010 5.443 - - 5.443 -

Sched. PL - Type I SOS 3 Feb. 1, 2018 - May 31, 2018 5.193 0.240 0.010 5.443 - - 5.443 -

Sched. G - Type II SOS Feb. 1, 2018 - Feb. 28, 2018 6.533 0.105 0.012 6.650 0.853 - 7.503 -

Sched. GS - Type II SOS Feb. 1, 2018 - Feb. 28, 2018 On-Peak Energy 8.211 0.105 0.015 8.331 0.735 - 9.066 - Feb. 1, 2018 - Feb. 28, 2018 Inter-Peak Energy 6.177 0.105 0.012 6.294 0.735 - 7.029 - Feb. 1, 2018 - Feb. 28, 2018 Off-Peak Energy 5.942 0.105 0.011 6.058 0.735 - 6.793 -

Scheds. GL, P & T - Type II SOS Feb. 1, 2018 - Feb. 28, 2018 On-Peak Energy 8.128 0.105 0.015 8.248 - - 8.248 - Feb. 1, 2018 - Feb. 28, 2018 Inter-Peak Energy 6.113 0.105 0.011 6.229 - - 6.229 - Feb. 1, 2018 - Feb. 28, 2018 Off-Peak Energy 5.934 0.105 0.011 6.050 - - 6.050 -

Scheds. GL, P & T - Type II SOS Transmission Demand Charge - - - - - 2.86 - 2.86

Note:1 The Adminstrative Charge rates typically change every February, June and October.2 Tax Rates: Gross Receipts Tax (GRT) = 2% (Transmission only) PSC Assessment = 0.1877% (Effective October 2017)3 Charge per lamp-watt (¢/lamp-watt) = 5.443 ¢/kWh x 0.333 = 1.813 ¢/lamp-watt; Sch. PL rate reflected in lamp fixture and renewal rates, effective February 2018Total SOS rates exclude Rider 8 - Energy Cost AdjustmentHourly Administrative Charge = 0.090 ¢/kWh effective February 2018

Baltimore Gas & Electric Company

Current Market-Priced Service Rate Components

Generation Rate Total SOS RateTransmission Rate

(Transmission Rates Effective June 1, 2017)

Baltimore Gas and Electric Company – Electric -- Retail 57

P. S. C. Md. -- E-6 (Suppl. 607612) Filed 08/31/1712/15/17 - Effective 10/01/1702/01/18

PRIVATE AREA LIGHTING – ELECTRIC

SCHEDULE P L

AVAILABILITY: For unmetered outdoor area lighting of private property.

MONTHLY RATES:

1. For supply of controlled electricity installation and maintenance of overhead supplied lamp fixtures and lamp renewals as required for each

Billing Watts Description Rate Mercury Vapor (limited to existing installations) 117 100w MV Pendant $9.339.35 205 175w MV Pendant 11.3311.37 454 400w MV Pend/Flood 17.2017.28 1,090 1000w MV Pendant 32.3532.54 Sodium Vapor 120 100w SV Flood (limited to existing installations) 10.8810.90 120 100w SV Pendant 9.359.37

173 150w SV Pendant 10.9610.99 298 250w SV Pendant 18.3018.35 467 400w SV Pend/Flood 18.9419.03 1,130 1000w SV Pendant 49.8150.01 Metal Halide (limited to existing installations) 189 100w MH Pulse Teardrop 26.5326.56 189 150w MH Pulse Pendant 18.3218.35 205 175w MH Pendant 18.3118.35 445 400w MH Spot or Flood 28.7128.79 445 400w MH Pendant 28.4028.48 448 400w MH Pulse Flood/Spot 28.7128.79 448 400w MH Pulse Pendant Gray 28.4028.48 1,090 1000w MH Pend/Flood 46.9847.17 Where longer than 4-foot upsweep arms are required for such lighting supply, add 3.68 For each span of overhead wires required on existing and additional poles 1.60 For the installation and maintenance of overhead-supplied lamp poles – each additional standard distribution wood pole 3.67

2. For supply of controlled electricity installation and maintenance of underground-supplied lamp fixtures and lamp renewals as required for each

Billing Watts Description Rate Mercury Vapor (limited to existing installations) 205 175w MV Modern/Colonial $12.6512.69 454 400w MV Pend/Flood 14.8514.93 Sodium Vapor 120 100w SV Colonial Modern (limited to existing installations) 10.9210.94 120 100w SV Flood (limited to existing installations) 8.638.65 120 100w SV Gothic 14.6214.64

Continued on Next Page

58 Baltimore Gas and Electric Company – Electric -- Retail

Schedule PL Continued

P. S. C. Md. -- E-6 (Suppl. 607612) Filed 08/31/1712/15/17 - Effective 10/01/1702/01/18

Billing Watts Description Rate 120 100w SV Acorn 14.6614.68 120 100w SV Acorn Havre de Grace 16.0716.09 120 100w SV Colonial Premiere 15.2115.23 120 100w SV Acorn Maple Lawn 17.6117.63 120 100w SV Pendant 8.638.65 173 150w SV Modern/Colonial 12.0812.11 173 150w SV Pendant 8.588.61 173 150w SV Rectilinear 17.7217.75 173 150w SV Acorn 16.3116.34 173 150w SV Gothic 16.3116.34 173 150w SV Acorn Victorian (limited to existing installations) 27.0927.12 173 150w SV Colonial Premiere 16.8316.86 173 150w SV Acorn Havre de Grace 17.7317.76 173 150w SV Acorn Maple Lawn 19.4019.43 173 150w SV Tear Drop 35.3435.37 298 250w SV Pendant 15.3015.35 298 250w SV Tear Drop 45.4645.51 467 400w SV Pend/Flood 16.5416.63 467 400w SV Rectilinear 28.4528.54 1,130 1000w SV Pendant 44.9145.11 Metal Halide (limited to existing installations) 129 100w MH Colonial 15.2015.22 129 100w MH Acorn Maple Lawn 23.3423.36 129 100w MH Acorn Havre de Grace 21.2821.30 129 100w MH Acorn 19.8819.90 129 100w MH Gothic 19.9319.95 129 100w MH Towson – green 23.1323.15 189 150w MH Pulse Acorn Maple Lawn 27.4527.48 189 150w MH Pulse Modern 19.1619.19 189 150w MH Pulse Pendant 17.2217.25 189 150w MH Pulse Acorn 23.0123.04 189 150w MH Pulse Acorn Havre de Grace 24.4324.46 189 150w MH Pulse Colonial 17.8517.88 189 150w MH Pulse Gothic 23.0123.04 189 150w MH Pulse Colonial Premiere 19.5819.61 189 150w MH Pulse Rectilinear 21.8321.86 189 150w MH Pulse Teardrop 26.4726.50 205 175w MH Acorn 23.0023.04 205 175w MH Colonial Premiere 17.8417.88 205 175w MH Up Lighting 29.3929.43 205 175w MH Gothic 23.0023.04 205 175w MH Modern 19.1419.18 205 175w MH Pendant 17.2117.25 205 175w MH Rectilinear 21.8521.89 205 175w MH Acorn Havre de Grace 24.4124.45 205 175w MH Acorn Maple Lawn 27.4327.47 205 175w MH Colonial Premiere 19.5619.60 448 400w MH Pulse Rectilinear 29.6229.70 448 400w MH Pulse Flood 22.6022.68

Continued on Next Page

Baltimore Gas and Electric Company – Electric – Retail 59

P. S. C. Md. -- E-6 (Suppl. 607612) Filed 08/31/1712/15/17 - Effective 10/01/1702/01/18

Billing Watts Description Rate 448 400w MH Pulse Pendant – Bronze 24.4724.55 448 400w MH Pulse Pendant – Gray 25.0725.15 445 400w MH Flood 22.6022.68 445 400w MH Pendant 24.4824.56 445 400w MH Rectilinear 29.6429.72 445 400w MH Pendant 25.1125.19 1,090 1000w MH Pend/Flood 43.1043.29 1,090 1000w MH Rectilinear 58.7558.94 Where longer than 4-foot upsweep arms are required on 35-foot embedded wood poles for such lighting supply, add 3.65

3. Lamp Fixtures – LED fixtures Billing Watts Description Rate

39 51 72 70 72 72 54 70 52 72 88

104 106 101 101

86 75

129 145 151 157 273 129 256

Light-Emitting Diode* LED 70 Pendant - 39 LED 100 Pendant - 51 LED 100 Pendant - 72 LED 100 Post Top Acorn LED 100 Post Top Arlington LED 100 Post Top Colonial LED 100 Post Top Modern LED 100 Post Top Decorative Acorn LED 100 Premiere Colonial LED 150 Pendant - 72 LED 150 Pendant - 88 LED 150 Post Top Arlington LED 150 Post Top Colonial LED 150 Post Top Acorn LED 150 Post Top Decorative Acorn LED 150 Tear Drop LED 150 Premiere Colonial LED 250 Pendant - 129 LED 250 Pendant - 145 LED 250 Tear Drop LED 400 Pendant - 157 LED 400 Pendant - 273 LED 400 Floodlight LED 1000 Floodlight *LED naming based on HID equivalent lamp watts

9.439.44 8.178.18

10.0610.07 25.6625.67 28.7828.79 17.5417.55 16.8416.85 34.8934.90 18.4718.48

9.459.46 10.5410.56 29.3929.41 18.6718.69 26.2426.26 35.4835.50 33.5633.58 20.4320.45 13.6313.65 13.9914.02 42.9042.92 16.9516.98 20.7920.84 15.2215.24 29.5329.57

4. For the installation and maintenance of underground supplied lamp poles and cables each 12-foot square wood standard embedded post-top pole $15.66 each 12 foot fiberglass pole 15.66 each 12-foot fiberglass pole with shroud 25.70 each 14 foot fiberglass pole 15.66 each 14-foot embedded fiberglass post-top pole 15.66 each 14-foot fiberglass hinged pole 21.65 each 14-foot fluted black fiberglass pole 30.85 each 19-foot underground pole 22.01 each 20-foot round embedded bronze fiberglass pole each 30-foot round bronze finished 24.90 each 23 foot fiberglass pole with shroud 32.79 each 25-foot embedded metal pole 25.99 each 30-foot embedded metal pole 22.01 each 30-foot round embedded bronze fiberglass 26.79 each 30-foot round embedded bronze-fiberglass pole (incl. 1 arm) 29.54

Continued on Next Page

77-A Electric – Retail – Baltimore Gas and Electric Company

P. S. C. Md. – E-6 (Suppl. 608612) Filed 10/27/1712/15/17 – Effective 12/01/1702/01/18

Energy

Rate

¢/kWh

Admin.

Charge

¢/kWh 1

Applicable

Taxes 2

Total

Generation

Rate

¢/kWh

Transm.

Rate incl.

GRT, PSC

Assess. ¢/kWh

Transm.

Rate incl.

GRT, PSC

Assess. $/kW

Total

Rate

¢/kWh

Total

Rate

$/kW

RESIDENTIAL

Schedule R Oct. 1, 2017 - May 31, 2018 6.894 0.215 0.013 7.122 1.127 - 8.249 - Feb. 1, 2018 - May 31, 2018 6.894 0.224 0.013 7.131 1.127 - 8.258 - Jun. 1, 2018 - Sep. 30, 2018 6.347 0.224 0.012 6.583 1.127 - 7.710 -

Schedule RL Oct. 1, 2017 - May 31, 2018 On-Peak 8.271 0.215 0.016 8.502 1.033 - 9.535 - Oct. 1, 2017 - May 31, 2018 Inter.-Peak 7.092 0.215 0.013 7.320 1.033 - 8.353 - Oct. 1, 2017 - May 31, 2018 Off-Peak 6.213 0.215 0.012 6.440 1.033 - 7.473 - Feb. 1, 2018 - May 31, 2018 On-Peak 8.271 0.224 0.016 8.511 1.033 - 9.544 - Feb. 1, 2018 - May 31, 2018 Int-Peak 7.092 0.224 0.013 7.329 1.033 - 8.362 - Feb. 1, 2018 - May 31, 2018 Off-Peak 6.213 0.224 0.012 6.449 1.033 - 7.482 - Jun. 1, 2018 - Sep. 30, 2018 On-Peak 8.439 0.224 0.016 8.679 1.033 - 9.712 - Jun. 1, 2018 - Sep. 30, 2018 Int-Peak 5.342 0.224 0.010 5.576 1.033 - 6.609 - Jun. 1, 2018 - Sep. 30, 2018 Off-Peak 5.256 0.224 0.010 5.490 1.033 - 6.523 -

Schedule EV Oct. 1, 2017 - May 31, 2018 On-Peak 14.104 0.215 0.026 14.345 4.500 - 18.845 - Oct. 1, 2017 - May 31, 2018 Off-Peak 4.500 0.215 0.008 4.723 - - 4.723 - Feb. 1, 2018 - May 31, 2018 On-Peak 14.104 0.224 0.026 14.354 4.500 - 18.854 - Feb. 1, 2018 - May 31, 2018 Off-Peak 4.500 0.224 0.008 4.732 - - 4.732 - Jun. 1, 2018 - Sep. 30, 2018 On-Peak 11.256 0.224 0.021 11.501 3.297 - 14.798 - Jun. 1, 2018 - Sep. 30, 2018 Off-Peak 3.821 0.224 0.007 4.052 - - 4.052 -

COMMERCIAL & INDUSTRIAL

Scheds. G/GU -Type I SOS Oct. 1, 2017 - May 31, 2018 6.459 0.187 0.012 6.658 0.853 - 7.511 - Feb. 1, 2018 - May 31, 2018 6.459 0.240 0.012 6.711 0.853 - 7.564 - Jun. 1, 2018 - Sep. 30, 2018 6.023 0.240 0.011 6.274 0.853 - 7.127 -

Sched. GS - Type I SOS Oct. 1, 2017 - May 31, 2018 On-Peak 8.088 0.187 0.015 8.290 0.735 - 9.025 - Oct. 1, 2017 - May 31, 2018 Inter.-Peak 6.888 0.187 0.013 7.088 0.735 - 7.823 - Oct. 1, 2017 - May 31, 2018 Off-Peak 5.900 0.187 0.011 6.098 0.735 - 6.833 - Feb. 1, 2018 - May 31, 2018 On-Peak 8.088 0.240 0.015 8.343 0.735 - 9.078 - Feb. 1, 2018 - May 31, 2018 Int-Peak 6.888 0.240 0.013 7.141 0.735 - 7.876 - Feb. 1, 2018 - May 31, 2018 Off-Peak 5.900 0.240 0.011 6.151 0.735 - 6.886 - Jun. 1, 2018 - Sep. 30, 2018 On-Peak 8.852 0.240 0.017 9.109 0.735 - 9.844 - Jun. 1, 2018 - Sep. 30, 2018 Int-Peak 5.589 0.240 0.010 5.839 0.735 - 6.574 - Jun. 1, 2018 - Sep. 30, 2018 Off-Peak 5.237 0.240 0.010 5.487 0.735 - 6.222 -

Sched. SL - Type I SOS 3 Oct. 1, 2017 - May 31, 2018 5.193 0.187 0.010 5.390 - - 5.390 -

Feb. 1, 2018 - May 31, 2018 5.193 0.240 0.010 5.443 - - 5.443 -

Sched. PL - Type I SOS 3 Oct. 1, 2017 - May 31, 2018 5.193 0.187 0.010 5.390 - - 5.390 -

Feb. 1, 2018 - May 31, 2018 5.193 0.240 0.010 5.443 - - 5.443 -

Sched. G - Type II SOS Dec. 1, 2017 - Feb. 28, 2018 6.533 0.124 0.012 6.669 0.853 - 7.522 - Feb. 1, 2018 - Feb. 28, 2018 6.533 0.105 0.012 6.650 0.853 - 7.503 -

Sched. GS - Type II SOS Dec. 1, 2017 - Feb. 28, 2018 On-Peak Energy 8.211 0.124 0.015 8.350 0.735 - 9.085 - Dec. 1, 2017 - Feb. 28, 2018 Inter-Peak Energy 6.177 0.124 0.012 6.313 0.735 - 7.048 - Dec. 1, 2017 - Feb. 28, 2018 Off-Peak Energy 5.942 0.124 0.011 6.077 0.735 - 6.812 - Feb. 1, 2018 - Feb. 28, 2018 On-Peak Energy 8.211 0.105 0.015 8.331 0.735 - 9.066 - Feb. 1, 2018 - Feb. 28, 2018 Inter-Peak Energy 6.177 0.105 0.012 6.294 0.735 - 7.029 - Feb. 1, 2018 - Feb. 28, 2018 Off-Peak Energy 5.942 0.105 0.011 6.058 0.735 - 6.793 -

Scheds. GL, P & T - Type II SOS Dec. 1, 2017 - Feb. 28, 2018 On-Peak Energy 8.128 0.124 0.015 8.267 - - 8.267 - Dec. 1, 2017 - Feb. 28, 2018 Inter-Peak Energy 6.113 0.124 0.011 6.248 - - 6.248 - Dec. 1, 2017 - Feb. 28, 2018 Off-Peak Energy 5.934 0.124 0.011 6.069 - - 6.069 - Feb. 1, 2018 - Feb. 28, 2018 On-Peak Energy 8.128 0.105 0.015 8.248 - - 8.248 - Feb. 1, 2018 - Feb. 28, 2018 Inter-Peak Energy 6.113 0.105 0.011 6.229 - - 6.229 - Feb. 1, 2018 - Feb. 28, 2018 Off-Peak Energy 5.934 0.105 0.011 6.050 - - 6.050 -

Scheds. GL, P & T - Type II SOS Transmission Demand Charge - - - - - 2.86 - 2.86

Note:1 The Adminstrative Charge rates typically change every February, June and October.2 Tax Rates: Gross Receipts Tax (GRT) = 2% (Transmission only) PSC Assessment = 0.1877% (Effective October 2017)3 Charge per lamp-watt (¢/lamp-watt) = 5.443 5.390¢/kWh x 0.333 = 1.813 1.795¢/lamp-watt; Sch. PL rate reflected in lamp fixture and renewal rates, effective February 2018 October 2017Total SOS rates exclude Rider 8 - Energy Cost AdjustmentHourly Administrative Charge = 0.090 0.059 ¢/kWh effective February 2018 October 2017

Baltimore Gas & Electric Company

Current Market-Priced Service Rate Components

Generation Rate Total SOS RateTransmission Rate

(Transmission Rates Effective June 1, 2017)