NSTAR ELECTRIC COMPANY d/b/a EVERSOURCE ENERGY SUMMARY OF ELECTRIC SERVICE DELIVERY RATES. M.D.P.U. No E Page 1 of 10

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1 Page 1 of 10 No. Code Area Component Distribution Rate Adjust (1) Distribution Decoupling Transition Transmission (2) System Benefits Recon. Total EEC Energy Delivery R-1 7 A1/A5 ALL Customer $7.00 $7.00 $7.00 Residential 01/48 Energy (kwh) $ $ $ $ ($ ) $ $ $ $ $ $ /66/68 CAPE Energy (kwh) $ $ $ $ ($ ) $ $ $ $ $ $ Last change 57/58/39 2/1/18 2/1/18 2/1/18 2/1/18 2/1/18 2/1/18 1/1/02 7/1/18 7/1/18 1/1/03 7/1/18 R-2 8 A2 ALL Customer $7.00 $7.00 $7.00 Residential 05 Energy (kwh) $ $ $ $ ($ ) $ $ $ $ $ $ Assistance 30/37/38 CAPE Energy (kwh) $ $ $ $ ($ ) $ $ $ $ $ $ Discount 36% 36% 36% 36% 36% 36% 36% 36% 36% 36% 36% R-3 9 A4/A8 ALL Customer $7.00 $7.00 $7.00 Residential 04/10 Energy (kwh) $ $ $ $ ($ ) $ $ $ $ $ $ Space Heating 86 CAPE Energy (kwh) $ $ $ $ ($ ) $ $ $ $ $ $ R-4 10 A3 ALL Customer $7.00 $7.00 $7.00 Residential Space 07 Energy (kwh) $ $ $ $ ($ ) $ $ $ $ $ $ Heating Assistance 42 CAPE Energy (kwh) $ $ $ $ ($ ) $ $ $ $ $ $ Discount 36% 36% 36% 36% 36% 36% 36% 36% 36% 36% 36% Non-Demand G-1 11 A9 BOST Customer $8.00 $8.00 $8.00 General Service Energy (kwh) - Winter $ $ $ $ ($ ) $ $ $ $ $ $ Energy (kwh) - Summer $ $ $ $ ($ ) $ $ $ $ $ $ Last change 7/1/18 2/1/18 7/1/18 2/1/18 2/1/18 2/1/18 1/1/02 7/1/18 7/1/18 1/1/03 7/1/18 Demand B1 BOST Customer $11.00 $11.00 $11.00 Demand (>10 kw) - Winter $0.27 $0.27 $18.19 $ st 2000 kwh $ $ $ $ ($ ) $ $ $ $ $ $ Next 150 hrs*kw $ $ $ $ ($ ) $ $ $ $ $ $ remainder kwh $ $ $ $ ($ ) $ $ $ $ $ $ Demand (>10 kw) - Summer $0.83 $0.83 $56.49 $ st 2000 kwh $ $ $ $ ($ ) $ $ $ $ $ $ Next 150 hrs*kw $ $ $ $ ($ ) $ $ $ $ $ $ remainder kwh $ $ $ $ ($ ) $ $ $ $ $ $ Last change 7/1/18 2/1/18 7/1/18 2/1/18 2/1/18 2/1/18 1/1/02 7/1/18 7/1/18 1/1/03 7/1/18

2 Page 2 of 10 No. Code Area Component Distribution Rate Adjust (1) Distribution Decoupling Transition Transmission (2) System Benefits Recon. Total EEC Energy Delivery G-2 12 B2 BOST Customer $18.00 $18.00 $18.00 General Service Demand (>10 kw) - Winter $9.32 $9.32 $8.73 $ st 2000 kwh $ $ $ $ ($ ) $ $ $ $ $ $ Next 150 hrs*kw $ $ $ $ ($ ) $ $ $ $ $ $ remainder kwh $ $ $ $ ($ ) $ $ $ $ $ $ Demand (>10 kw) - Summer $19.99 $19.99 $23.43 $ st 2000 kwh $ $ $ $ ($ ) $ $ $ $ $ $ Next 150 hrs*kw $ $ $ $ ($ ) $ $ $ $ $ $ remainder kwh $ $ $ $ ($ ) $ $ $ $ $ $ Transformer Credit / kw ($0.12) ($0.12) ($0.12) Last change 7/1/18 2/1/18 7/1/18 2/1/18 2/1/18 2/1/18 1/1/02 7/1/18 7/1/18 1/1/03 7/1/18 G-3 13 B3 (NEMA) BOST Customer $ $ $ General Service G6 (SEMA) Demand (kw) - Winter $8.58 $8.58 $10.28 $18.86 Peak kwh $ $ $ $ ($ ) $ $ $ $ $ $ Off Peak kwh $ $ $ $ ($ ) $ $ $ $ $ $ Demand (kw) - Summer $14.54 $14.54 $10.28 $24.82 Peak kwh $ $ $ $ ($ ) $ $ $ $ $ $ Off Peak kwh $ $ $ $ ($ ) $ $ $ $ $ $ T-1 14 B5 BOST Customer $10.00 $10.00 $10.00 Optional Peak kwh - Winter $ $ $ $ ($ ) $ $ $ $ $ $ General Service Off Peak kwh - Winter $ $ $ $ ($ ) $ $ $ $ $ $ TOU Peak kwh - Summer $ $ $ $ ($ ) $ $ $ $ $ $ (closed) Off Peak kwh - Summer $ $ $ $ ($ ) $ $ $ $ $ $ Last change 7/1/18 2/1/18 7/1/18 2/1/18 2/1/18 2/1/18 1/1/02 7/1/18 7/1/18 1/1/03 7/1/18 T-2 15 B7 (NEMA) BOST Customer (kw<=150) $27.00 $27.00 $27.00 General Service G8 (SEMA) Customer (150<kW<=300) $ $ $ TOU Customer (300<kW<=1000) $ $ $ Customer (kw>1000) $ $ $ Demand (kw) - Winter $11.08 $11.08 $9.00 $20.08 Peak kwh $ $ $ $ ($ ) $ $ $ $ $ $ Off Peak kwh $ $ $ $ ($ ) $ $ $ $ $ $ Demand (kw) - Summer $19.45 $19.45 $9.00 $28.45 Peak kwh $ $ $ $ ($ ) $ $ $ $ $ $ Off Peak kwh $ $ $ $ ($ ) $ $ $ $ $ $ Transformer Credit / kw ($0.12) ($0.12) Last change 7/1/18 2/1/18 7/1/18 2/1/18 2/1/18 2/1/18 1/1/02 7/1/18 7/1/18 1/1/03 7/1/18 WR 16 E1 BOST Customer $ $ $ MWRA Demand (kw) $0.00 $0.00 $6.93 $6.93 Energy (kwh) $ $ $ $ ($ ) $ $ $ $ $ $

3 Page 3 of 10 No. Code Area Component Distribution Rate Adjust (1) Distribution Decoupling Transition Transmission (2) System Benefits Recon. Total EEC Energy Delivery SB-G3 17 C6 (NEMA) BOST Customer $ $ $ General Service F6 (SEMA) Standby Demand<1MW (Winter) $4.45 $4.45 $4.45 Standby Standby Demand=>1 MW (Winter) $6.24 $6.24 $6.24 Standby Demand<1MW (Summer) $7.37 $7.37 $7.37 Standby Demand=>1MW (Summer) $10.34 $10.34 $10.34 Supplemental Service per G-3 per G-3 per G-3 per G-3 per G-3 per G-3 per G-3 per G-3 per G-3 per G-3 per G-3 G-0 General CAMB Customer $5.00 $5.00 $5.00 (Non-Demand) Energy (kwh) $ $ $ $ ($ ) $ $ $ $ $ $ G-1 General CAMB Customer $8.00 $8.00 $8.00 Demand (<=10 kw) $3.74 $3.74 $8.67 $12.41 Demand ( > 10 kw) $6.99 $6.99 $8.67 $15.66 Energy (kwh) $ $ $ $ ($ ) $ $ $ $ $ $ G CAMB Customer $97.00 $97.00 $97.00 Large General Demand (<=100 kva) $4.04 $4.04 $5.46 $9.50 Secondary Demand ( > 100 kva) $5.01 $5.01 $11.16 $16.17 Service Peak kwh $ $ $ $ ($ ) $ $ $ $ $ $ Low A kwh $ $ $ $ ($ ) $ $ $ $ $ $ Low B kwh $ $ $ $ ($ ) $ $ $ $ $ $ G CAMB Customer $97.00 $97.00 $97.00 Large General Demand (<=100 kva) $0.00 $0.00 $ $ TOU Demand ( > 100 kva) $4.31 $4.31 $8.48 $ kv Service Peak kwh $ $ $ $ ($ ) $ $ $ $ $ $ Low A kwh $ $ $ $ ($ ) $ $ $ $ $ $ Low B kwh $ $ $ $ ($ ) $ $ $ $ $ $ G CAMB Customer $12.00 $12.00 $12.00 Optional General Demand (kw) $4.14 $4.14 $9.98 $14.12 TOU Peak kwh $ $ $ $ ($ ) $ $ $ $ $ $ Low A kwh $ $ $ $ ($ ) $ $ $ $ $ $ G CAMB Customer $8.00 $8.00 $8.00 Commercial Energy (<=5000 kwh) $ $ $ $ ($ ) $ $ $ $ $ $ Space Heating Energy (>5000 kwh) $ $ $ $ ($ ) $ $ $ $ $ $ (closed)

4 Page 4 of 10 No. Code Area Component Distribution Rate Adjust (1) Distribution Decoupling Transition Transmission (2) System Benefits Recon. Total EEC Energy Delivery G CAMB Customer $8.22 $8.22 $8.22 Optional General Peak kwh $ $ $ $ ($ ) $ $ $ $ $ $ TOU Low A kwh $ $ $ $ ($ ) $ $ $ $ $ $ (Non-Demand) SB-1 25 D1 CAMB Customer $ $ $ Standby Standby Demand/Replacement $4.37 $4.37 $7.99 $12.36 Minimum Reservation $0.00 $0.00 $0.61 $0.61 Replacement Energy $ $ $ $ ($ ) $ $ $ $ $ $ MS-1 26 D4 CAMB Customer $ $ $ Maintenance Standby Demand/Replacement $4.37 $4.37 $4.37 Replacement Energy $ $ $ $ ($ ) $ $ $ $ $ $ SS-1 Customer $0.00 Supplemental 27 D7 All Rate Components per G-3 per G-3 per G-3 per G-3 per G-3 per G-3 per G-3 per G-3 per G-3 per G-3 per G-3 SB-G CAMB Customer $97.00 $97.00 $97.00 General Service Standby Demand<=1MW Standby <=100 kva $0.00 $0.00 $0.00 >100 kva $0.78 $0.78 $0.78 Standby Demand=>1 MW <=100 kva $0.00 $0.00 $0.00 >100 kva $1.78 $1.78 $1.78 Supplemental Demand <=100 kva $0.00 $0.00 $ $ >100 kva $6.36 $6.36 $8.48 $14.84 Supplemental Energy $ $ $ $ ($ ) $ $ $ $ $ $ Annual/Seasonal Optional G-1 General 29 33/23 SOUTH Customer $6.00 $6.00 $6.00 Demand (<=10 kw) $0.00 $0.00 $0.00 Demand (>10 kw) $4.85 $4.85 $4.85 Energy (< =2300 kwh) $ $ $ $ ($ ) $ $ $ $ $ $ Energy (>2300 kwh) $ $ $ $ ($ ) $ $ $ $ $ $ CAPE Energy (< =2300 kwh) $ $ $ $ ($ ) $ $ $ $ $ $ CAPE Energy (>2300 kwh) $ $ $ $ ($ ) $ $ $ $ $ $ Seasonal 35 SOUTH Cust $6.00 $6.00 $6.00 Demand (<=10 kw) $0.00 $0.00 $0.00 Demand (>10 kw) $4.25 $4.25 $4.25 Energy (< =1800 kwh) $ $ $ $ ($ ) $ $ $ $ $ $ Energy (>1800 kwh) $ $ $ $ ($ ) $ $ $ $ $ $ CAPE Energy (< =1800 kwh) $ $ $ $ ($ ) $ $ $ $ $ $ CAPE Energy (>1800 kwh) $ $ $ $ ($ ) $ $ $ $ $ $

5 Page 5 of 10 No. Code Area Component Distribution Rate Adjust (1) Distribution Decoupling Transition Transmission (2) System Benefits Recon. Total EEC Energy Delivery G SOUTH Cust $ $ $ Medium General Demand (kva) $1.51 $1.51 $8.16 $9.67 TOU Peak kwh $ $ $ $ ($ ) $ $ $ $ $ $ Low A kwh $ $ $ $ ($ ) $ $ $ $ $ $ Low B kwh $ $ $ $ ($ ) $ $ $ $ $ $ CAPE Peak kwh $ $ $ $ ($ ) $ $ $ $ $ $ CAPE Low A kwh $ $ $ $ ($ ) $ $ $ $ $ $ CAPE Low B kwh $ $ $ $ ($ ) $ $ $ $ $ $ G SOUTH Customer $ $ $ Large General Demand (kva) $0.87 $0.87 $8.22 $9.09 TOU Energy (kwh) - Peak $ $ $ $ ($ ) $ $ $ $ $ $ Energy (kwh) - Low A $ $ $ $ ($ ) $ $ $ $ $ $ Energy (kwh) - Low B $ $ $ $ ($ ) $ $ $ $ $ $ CAPE Energy (kwh) - Peak $ $ $ $ ($ ) $ $ $ $ $ $ CAPE Energy (kwh) - Low A $ $ $ $ ($ ) $ $ $ $ $ $ CAPE Energy (kwh) - Low B $ $ $ $ ($ ) $ $ $ $ $ $ G SOUTH Customer $6.00 $6.00 $6.00 General Power Demand (kw) $1.74 $1.74 $2.69 $4.43 Energy (kwh) $ $ $ $ ($ ) $ $ $ $ $ $ CAPE Energy (kwh) $ $ $ $ ($ ) $ $ $ $ $ $ G SOUTH Customer $6.00 $6.00 $6.00 Commercial Energy (kwh) $ $ $ $ ($ ) $ $ $ $ $ $ Space Heating CAPE Energy (kwh) $ $ $ $ ($ ) $ $ $ $ $ $ (Closed) G SOUTH Customer $30.00 $30.00 $30.00 All Electric School Energy (kwh) $ $ $ $ ($ ) $ $ $ $ $ $ (Closed) CAPE Energy (kwh) $ $ $ $ ($ ) $ $ $ $ $ $ Annual G SOUTH Customer $10.00 $10.00 $10.00 Optional General Demand (kw) $3.33 $3.33 $10.63 $13.96 TOU Peak kwh $ $ $ $ ($ ) $ $ $ $ $ $ Low A kwh $ $ $ $ ($ ) $ $ $ $ $ $ CAPE Peak kwh $ $ $ $ ($ ) $ $ $ $ $ $ CAPE Low A kwh $ $ $ $ ($ ) $ $ $ $ $ $ Seasonal 31 SOUTH Customer $10.00 $10.00 $10.00 Demand (kw) $3.36 $3.36 $4.96 $8.32 Peak kwh $ $ $ $ ($ ) $ $ $ $ $ $ Low A kwh $ $ $ $ ($ ) $ $ $ $ $ $ CAPE Peak kwh $ $ $ $ ($ ) $ $ $ $ $ $ CAPE Low A kwh $ $ $ $ ($ ) $ $ $ $ $ $

6 Page 6 of 10 No. Code Area Component Distribution Rate Adjust (1) Distribution Decoupling Transition Transmission (2) System Benefits Recon. Total EEC Energy Delivery S-1 44 C1/C3 ALL Fixture Charge Per Rate Per Rate Per Rate Street and 19/80 Energy (kwh) $ $ ($ ) $ $ $ $ $ Security Lighting 79/81 CAPE Energy (kwh) $ $ ($ ) $ $ $ $ $ Last Change 7/1/18 2/1/18 7/1/18 2/1/18 2/1/18 2/1/18 1/1/02 7/1/18 7/1/18 1/1/03 7/1/18 S-2 45 C2/C4 ALL Customer $6.58 $6.58 $6.58 Street and Security - 83/89 Energy (kwh) $ $ $ $ ($ ) $ $ $ $ $ $ Customer Owned 82/96 CAPE Energy (kwh) $ $ $ $ ($ ) $ $ $ $ $ $ Last Change 7/1/18 2/1/18 7/1/18 2/1/18 2/1/18 2/1/18 1/1/02 7/1/18 7/1/18 1/1/03 7/1/18 (2) Transmission Charge for Rate R-2 customers in the Boston service area is $ from February 1, 2018 through December 31, 2018 Summer Months - June thru September Winter Months - October thru May

7 Page 7 of 10 PART B - RECONCILING RATES (1) All Rates are in $/kwh across all hours and usage levels; totals appear in Part A MDPU No. Service Area Pension (PAF) Residential Assistance (RAAF) Net Metering Surcharge (NMRS) Attorney General Consulting Expense (AGCE) Long Term Renewable Contract (LTRCA) Storm Cost (SCRAF) Solar Program Cost (SPCA) Basic Service Cost True Up (BSTF) Total R-1 Residential 7 ALL ($ ) $ $ $ $ $ $ $ $ R-2 Residential Assistance 8 ALL ($ ) $ $ $ $ $ $ $ $ R-3 Residential Space Heating 9 ALL ($ ) $ $ $ $ $ $ $ $ R-4 Residential Space 10 ALL ($ ) $ $ $ $ $ $ $ $ Heating Assistance G-1 General Service 11 BOST ($ ) $ $ $ $ $ $ $ $ G-2 General Service 12 BOST ($ ) $ $ $ $ $ $ $ $ G-3 General Service 13 BOST ($ ) $ $ $ $ $ $ $ $ T-1 General Service 14 BOST ($ ) $ $ $ $ $ $ $ $ Optional Time-of-Use T-2 General Service 15 BOST ($ ) $ $ $ $ $ $ $ $ Time-of-Use. WR MWRA 16 BOST ($ ) $ $ $ $ $ $ $ $

8 Page 8 of 10 PART B - RECONCILING RATES (1) All Rates are in $/kwh across all hours and usage levels; totals appear in Part A MDPU No. Service Area Pension (PAF) Residential Assistance (RAAF) Net Metering Surcharge (NMRS) Attorney General Consulting Expense (AGCE) Long Term Renewable Contract (LTRCA) Storm Cost (SCRAF) Solar Program Cost (SPCA) Basic Service Cost True Up (BSTF) Total G-0 General (Non-Demand) 18 CAMB ($ ) $ $ $ $ $ $ $ $ G-1 General 19 CAMB ($ ) $ $ $ $ $ $ $ $ G-2 Large General TOU 20 CAMB ($ ) $ $ $ $ $ $ $ $ Secondary Service G-3 Large General TOU 21 CAMB ($ ) $ $ $ $ $ $ $ $ kv Service G-4 Optional General TOU 22 CAMB ($ ) $ $ $ $ $ $ $ $ G-5 23 CAMB ($ ) $ $ $ $ $ $ $ $ Commercial Space Heating (closed) G-6 24 CAMB ($ ) $ $ $ $ $ $ $ $ Optional General TOU (Non-Demand) G-1 General 29 SOUTH ($ ) $ $ $ $ $ $ $ $ G-2 Medium General TOU 30 SOUTH ($ ) $ $ $ $ $ $ $ $ G-3 Large General TOU 31 SOUTH ($ ) $ $ $ $ $ $ $ $

9 Page 9 of 10 PART B - RECONCILING RATES (1) All Rates are in $/kwh across all hours and usage levels; totals appear in Part A MDPU No. Service Area Pension (PAF) Residential Assistance (RAAF) Net Metering Surcharge (NMRS) Attorney General Consulting Expense (AGCE) Long Term Renewable Contract (LTRCA) Storm Cost (SCRAF) Solar Program Cost (SPCA) Basic Service Cost True Up (BSTF) Total G-4 General Power 32 SOUTH ($ ) $ $ $ $ $ $ $ $ G-5 Commercial Space Heating 33 SOUTH ($ ) $ $ $ $ $ $ $ $ (Closed) G-6 All Electric School 34 SOUTH ($ ) $ $ $ $ $ $ $ $ (Closed) G-7 Optional General TOU 35 SOUTH ($ ) $ $ $ $ $ $ $ $ S-1 Street and Security Lighting 44 ALL ($ ) $ $ $ $ $ $ $ $ S-2 Street and Security - 45 ALL ($ ) $ $ $ $ $ $ $ $ Customer Owned

10 Page 10 of 10 PART C - BASIC SERVICE * All Rates are in $/kwh across all hours and usage levels Sector Rate Class Type Zone 01-Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec-18 Last Change Residential R-1, R-2, R-3, R-4 Fixed ALL $ $ $ $ $ $ $ $ $ $ $ $ /1/18 Variable ALL $ $ $ $ $ $ $ $ $ $ $ $ /1/18 Small C&I G-0(CAMB), G-1(BOST/CAMB/SOUTH), G-2(BOST), Fixed ALL $ $ $ $ $ $ $ $ $ $ $ $ /1/18 G-4(CAMB/SOUTH), G-5(CAMB/SOUTH), Variable ALL $ $ $ $ $ $ $ $ $ $ $ $ /1/18 G-6(CAMB/SOUTH), G-7(SOUTH), T-1(BOST) Large C&I G-2(CAMB), G-3(BOST/CAMB), T-2(BOST) Fixed NEMA $ $ $ $ $ $ $ $ $ $ $ $ /1/18 Variable NEMA $ $ $ $ $ $ $ $ $ $ $ $ /1/18 Large C&I G-2(SOUTH), G-3(BOST/SOUTH), T-2 (BOST) Fixed SEMA $ $ $ $ $ $ $ $ $ $ $ $ /1/18 Variable SEMA $ $ $ $ $ $ $ $ $ $ $ $ /1/18 St. Lighting S-1, S-2 Fixed ALL $ $ $ $ $ $ $ $ $ $ $ $ /1/18 Variable ALL $ $ $ $ $ $ $ $ $ $ $ $ /1/18 * Includes the Basic Service Bad Debt Cost of $ and NSTAR Green Cost of $