2019-2021 ASSESSMENT OF POTENTIAL (AOP) March 29, 2018 - - PowerPoint PPT Presentation

2019 2021 assessment of potential aop
SMART_READER_LITE
LIVE PREVIEW

2019-2021 ASSESSMENT OF POTENTIAL (AOP) March 29, 2018 - - PowerPoint PPT Presentation

2019-2021 ASSESSMENT OF POTENTIAL (AOP) March 29, 2018 INTRODUCTION First step in planning process Assessment of Potential (AoP) estimates potential savings, which is one important input in goal-setting Presentation will discuss


slide-1
SLIDE 1

2019-2021 ASSESSMENT OF POTENTIAL (AOP)

►March 29, 2018

slide-2
SLIDE 2

www.ma-eeac.org 2019-2021 Assessment of Potential

INTRODUCTION

►First step in planning process ►Assessment of Potential (AoP) estimates potential

savings, which is one important input in goal-setting

►Presentation will discuss − AoP key take aways − AoP methodology − Summary of PA potential studies − Electric potential considerations, adjustments and costs − Gas potential considerations, adjustments, and costs

| 2

slide-3
SLIDE 3

www.ma-eeac.org 2019-2021 Assessment of Potential

KEY TAKE AWAYS

►There is still potential in MA to support electric

savings in excess of 3%

►There is still potential in MA to support robust

programs

►Residential electric potential is lower than recent

achievement due to lighting changes

►C&I electric opportunities remain strong ►No significant changes expected in gas potential for

either residential or C&I

►Early expectations are that residential costs may

increase somewhat, but PA Plan will provide best source of data for ongoing planning

| 3

slide-4
SLIDE 4

www.ma-eeac.org 2019-2021 Assessment of Potential

CONSULTANT AOP APPROACH AND METHODOLOGY

►In previous planning cycles, Consultants relied on

historical achievement as primary basis for AoP

►Current AoP uses PA potential studies informed by

trends and market knowledge as starting point

►For 2019-2021, past not necessarily a strong predictor

  • f the future

− Changing lighting standards and market transformation − Changing baselines − New more varied and integrated opportunities ►In years past, no potential studies for all PAs ►Made adjustments based on additional analysis of key

considerations and recent program experience

| 4

slide-5
SLIDE 5

www.ma-eeac.org 2019-2021 Assessment of Potential

PA POTENTIAL STUDIES OVERVIEW

► Not all PA potential studies were completed

by the same contractor

► PA contractors used different assumptions ► Most PA studies only included annual savings

| 5

► Active demand potential estimate forthcoming

(April)

► Contractors will rerun results with new avoided costs ► Consultant analysis required data extrapolation to

compare results between studies

► PAs hired contractors to complete

potential studies

► Scopes of work for each study varied by PA

slide-6
SLIDE 6

www.ma-eeac.org 2019-2021 Assessment of Potential

PA POTENTIAL STUDIES EXCLUDED SEVERAL SOURCES OF SAVINGS

| 6

NGrid Ever- source CLC Unitil Electric Unitil Gas CMA Berkshire Liberty Lead Author Navigant Dunsky ODC/ Dunsky GDS GDS Dunsky GDS GDS Received 2/7 1/15 1/15 3/13 1/31 2/22 2/5 2/5 Includes: Fuel Switching SEM x x CHP Micro x Behavior x x x x x x

slide-7
SLIDE 7

www.ma-eeac.org 2019-2021 Assessment of Potential

TYPES OF POTENTIAL USED IN PA POTENTIAL STUDIES

| 7

Level of savings given current programs, new technologies, and some different incentive levels

Business as Usual Enhanced (BAU+)

Maximum level of cost-effective potential recognizing market barriers

Maximum (MAX) Achievable

Portion of technically feasible potential that is cost-effective assuming no market barriers

Economic

Level of savings given current programs and incentives

Business as Usual (BAU) Achievable

►Precise potential definitions varied by study

slide-8
SLIDE 8

www.ma-eeac.org 2019-2021 Assessment of Potential | 8

ELECTRIC

Res Electric

C&I Electric Res Gas C&I Gas

Res Lighting

slide-9
SLIDE 9

www.ma-eeac.org 2019-2021 Assessment of Potential

2017 PROGRAMS ACHIEVED HIGHEST ANNUAL SAVINGS

| 9

  • 200,000

400,000 600,000 800,000 1,000,000 1,200,000 1,400,000 1,600,000 1,800,000 2010 2011 2012 2013 2014 2015 2016 2017 2018 MWh

Portfolio Annual Electric Savings

2.93%

  • f Sales

3.36%

  • f Sales
slide-10
SLIDE 10

www.ma-eeac.org 2019-2021 Assessment of Potential

PORTFOLIO LIFETIME ELECTRIC SAVINGS OVER TIME

| 10

  • 2,000,000

4,000,000 6,000,000 8,000,000 10,000,000 12,000,000 14,000,000 16,000,000 18,000,000 20,000,000 2010 2011 2012 2013 2014 2015 2016 2017 2018 MWh

Portfolio Lifetime Electric Savings

Evaluated-Portfolio Planned-Portfolio Q4 2017-Portfolio

High level of CHP High level of CHP

slide-11
SLIDE 11

www.ma-eeac.org 2019-2021 Assessment of Potential

PA POTENTIAL STUDY RESULTS

►The table below presents 2019-2021 maximum

achievable annual electric savings as a % of sales

| 11

Contractor Residential Low Income C&I Total Portfolio Eversource Dunsky 4.12% 1.93% 3.50% 3.63% CLC* ODC/Dunsky 3.68% 4.47% 3.50% 3.31% National Grid Navigant 2.95% 2.32% 3.03% 2.95% Unitil GDS 2.79% 2.25% 1.70% 2.04% PA Weighted Average 3.49% 2.24% 3.28% 3.29% 2017 Q4 Reported 5.38% 2.07% 2.38% 3.36%

*CLC potential study did not include Max achievable scenario. Estimated using % change from BAU+ to Max achievable scenario for Eversource study

slide-12
SLIDE 12

www.ma-eeac.org 2019-2021 Assessment of Potential

PA POTENTIAL STUDY ESTIMATES COMPARED TO PAST PLANNING PERIODS

| 12

  • 200,000

400,000 600,000 800,000 1,000,000 1,200,000 1,400,000 1,600,000 1,800,000 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021

Portfolio Annual Electric Savings (MWh)

Evaluated Planned Q4 2017 Eversource % of Sales Unitl % of Sales N.Grid % of Sales CLC % of Sales Potential Average % of Sales PA April 2015 Plan 3.63% (Eversource) 3.31% (CLC) 2.95% (National Grid) 2.04% (Unitil) 3.29 (PA Average)

slide-13
SLIDE 13

www.ma-eeac.org 2019-2021 Assessment of Potential

KEY CONSIDERATIONS-POSITIVE OR NEGATIVE IMPACTS

| 13

Residential

  • Lighting
  • Fuel switching
  • Program redesign
  • Behavior
  • Evaluation
  • Baseline changes

C&I

  • Lighting
  • CHP
  • SEM
  • Upstream changes
  • Evaluation
  • Baseline changes
slide-14
SLIDE 14

www.ma-eeac.org 2019-2021 Assessment of Potential

RESIDENTIAL

| 14

Residential

  • Lighting
  • Fuel switching
  • Program redesign
  • Behavior
  • Evaluation
  • Baseline Changes

Res Electric

C&I Electric Res Gas C&I Gas

Res Lighting

slide-15
SLIDE 15

www.ma-eeac.org 2019-2021 Assessment of Potential

RESIDENTIAL CONSIDERATIONS: LIGHTING

► 2017 Res annual electric savings estimated to be 73% lighting ► PA potential studies show varying levels of declining lighting savings

and NTG higher than agreed-to values going forward

► Eversource report estimates a 65% reduction compared to 2016 and a

45% reduction from 2019 to 2021

► Noticeably steeper decline estimate for Eversource than National Grid

| 15

Yellow Bar = Lighting

Residential Lighting (Annual GWh)

Eversource National Grid

slide-16
SLIDE 16

www.ma-eeac.org 2019-2021 Assessment of Potential

RESIDENTIAL CONSIDERATIONS: LIGHTING

► Consultants estimate

steeper lighting savings drop than PA studies

► PA studies did not use

most recent evaluation findings

► NTG values are lower

(~50% vs 35% and declining) than in PA potential studies

► PA study lighting NTG

values vary

| 16

  • 100,000

200,000 300,000 400,000 500,000 600,000 700,000 2016 2017 2019 2020 2021

Projected Annual Lighting Savings (MWh)

Evaluated Q4 2017 Consultant Projected

82% drop from 2017

slide-17
SLIDE 17

www.ma-eeac.org 2019-2021 Assessment of Potential

RESIDENTIAL OPPORTUNITIES: FUEL SWITCHING

►PA Potential studies did not address fuel switching ►Unregulated fuel (oil and propane) to electric fuel

conversions could yield increased electric usage, but modest MMBtu savings

| 17

2019-2021 Heat Pump Fuel Switch Estimate*

  • Avg. unregulated fuel participation rate

1.5% Number of units 75,000 MMBtu Fossil Fuel savings (MMBtu) 1.2 Million Increased Electric usage (MWh) 110,000 Net Annual MMBtu reduction 840,000

*Estimate includes ducted heat pumps, ductless heat pumps, and heat pump water heaters

slide-18
SLIDE 18

www.ma-eeac.org 2019-2021 Assessment of Potential

RESIDENTIAL OPPORTUNITIES: PROGRAM REDESIGN

►Feb. 28 EEAC resolution supports

provision of a new, integrated residential program design

►The PAs’ potential study scenarios

don’t involve a significant redesign

  • f the residential program

− MAX achievable potential scenarios included generic reductions to market barriers, which translated to higher modeled participation − However, specific program changes were not modeled

| 18

slide-19
SLIDE 19

www.ma-eeac.org 2019-2021 Assessment of Potential

CONTINUOUS ENGAGEMENT MODEL

Significant evolution of residential retrofit program design and IT functionality needed to achieve broader and deeper cost-efficient savings

| 19

Key Elements Needed

Common

  • nline

portal Channel Partners New Measures & Methods Technology

  • enabled

processes

slide-20
SLIDE 20

www.ma-eeac.org 2019-2021 Assessment of Potential

REDESIGN SAVINGS POTENTIAL

| 20

► Possible decline in participation and savings during initial rollout ► Assumes higher participation and measure uptake and conversions 5 10 15 20 25 30 35 2017 2018 2019 2020 2021 2022 2023 2024 Energy Savings (Million MMBtu)

Residential Lifetime Savings Impact (Electric + Gas) CONCEPTUAL PROJECTION

No Program Redesign Program Redesign

− Changes supported by modernized IT portal − Higher HVAC equipment uptake compared to weatherization 2019-21 Possible Additions to Annual Savings Potential

  • 50+ GWh
  • 9 Million therms
  • 250k MMBtu (oil/propane)
slide-21
SLIDE 21

www.ma-eeac.org 2019-2021 Assessment of Potential

RESIDENTIAL POTENTIAL SUMMARY

►Will be extremely challenging to make up lost lighting

savings in the electric sector in 2019-2021

►Several things needed to keep savings impacts as low

as possible

− Aggressive approaches to boost existing measure production − Identifying new measures and approaches − Promoting fuel switching − Continuing innovations in new construction, and active demand management ►New continuous engagement program model offers

  • pportunity for broader and deeper savings for all

fuels

| 21

slide-22
SLIDE 22

www.ma-eeac.org 2019-2021 Assessment of Potential

RESIDENTIAL ELECTRIC POTENTIAL

| 22

Residential Adjustments Savings as %

  • f Res Sales

Annual GWh (2019-2021) Annual Other Fuel MMBTU (2019-2021) Weighted Average PA Potential Study 3.49% 1,550 Lighting

  • 0.79%
  • 350

+TBD Fuel Switching

  • 0.25%
  • 115

+ 1.2 Million Behavior + 0.16% + 70 Program Redesign + TBD + TBD + TBD Net Changes to Potential

  • 0.88%
  • 395

+ 1.2 Million Net Potential After Adjustments 2.62% 1,155 2017 Q4 Reported Achievement 5.38% 836 Annualized Potential After Adjustments 2.62% 385

slide-23
SLIDE 23

www.ma-eeac.org 2019-2021 Assessment of Potential

C&I

| 23

Res Electric 2.62%

C&I Electric Res Gas C&I Gas

slide-24
SLIDE 24

www.ma-eeac.org 2019-2021 Assessment of Potential

C&I CONSIDERATIONS: LIGHTING

►C&I lighting market transitioning from screw-in to

linear and other LED technologies

►This is good from an opportunity and EM&V

perspective –favorable evaluations for linear lighting

| 24

  • 50,000

100,000 150,000 200,000 250,000 Gross Annual Savings (MWh)

MA Statewide Gross Lighting Savings

All Screw Based Upstream Linear LED All Other/Custom All Linear LED Upstream Screw-In

slide-25
SLIDE 25

www.ma-eeac.org 2019-2021 Assessment of Potential

C&I CONSIDERATIONS: LIGHTING

►There is still strong potential in C&I linear lighting

(linear lighting not effected by EISA)

►42% of all C&I economic potential is in networked

(controlled) linear lighting

| 25

Historic Gross Savings Estimated Potential Savings

  • 100,000

200,000 300,000 400,000 500,000 600,000 700,000 Annual MWh

MA Annual Lighting Savings and Max Achievable Potential

Screw Based Advanced Lighting Design Controls Linear LED Other/Custom

slide-26
SLIDE 26

www.ma-eeac.org 2019-2021 Assessment of Potential

C&I OPPORTUNITIES: CHP

►CHP was not included in the PA potential studies − CLC found zero potential, Eversource included micro CHP ►CHP typically increases C&I Savings by 13.5% or 80k

MWh annual savings per year (16.4) MW)

►DOER has identified a strong pipeline at ~35 MW/yr

| 26

22 MW MIT CHP likely in 2019-2021*

*https://powering.mit.edu/project-faq

slide-27
SLIDE 27

www.ma-eeac.org 2019-2021 Assessment of Potential

C&I OPPORTUNITIES: STRATEGIC ENERGY MANAGEMENT

►CMA was the only PA to attribute a value to SEM − Value was applicable to buildings > 25k square ft.

  • Commercial potential assumed to be 6% of gas use
  • Industrial potential assumed to be 2% of all gas use

►The EEAC has recommended SEM in past resolutions ►PAs released a SEM RFP, which could bring in new

savings as soon as 2019

►Estimate that SEM could increase C&I electric annual

savings 2.1% per year and 0.46% for C&I gas savings

| 27

slide-28
SLIDE 28

www.ma-eeac.org 2019-2021 Assessment of Potential

C&I OPPORTUNITIES: UPSTREAM

►PA potential studies did not consider program

modifications such as moving measures upstream

►Upstream approach can increase volume and

savings

− Example: gas water heaters ►Upstream lighting is the least expensive electric C&I

initiative on a $ / lifetime kWh basis

►PAs continue to add new measures upstream: − Electric: LED fixtures with controls, LED high/low bay, T5 TLEDs, VRF HP, circulator pumps, food service equip. − Gas: Food service, other measures in pipeline

| 28

slide-29
SLIDE 29

www.ma-eeac.org 2019-2021 Assessment of Potential

C&I CONSIDERATIONS: EVALUATION AND BASELINE CHANGES

►Consultant analysis shows the following C&I impacts:

| 29

  • Decrease future electric savings by 1.1%
  • Comprehensive Design (CDA), Multiple

Upstream, Custom Process, Small Biz Lighting

Electric Evaluations

  • Decrease future gas savings 10.9%
  • CDA, Upstream HVAC, Steam traps (Custom

and Rx)

Gas Evaluations

  • 3% reduction in electric annual savings
  • 11% reduction in gas annual savings

Baseline and Industry Standard Practice Changes

slide-30
SLIDE 30

www.ma-eeac.org 2019-2021 Assessment of Potential

C&I ELECTRIC POTENTIAL

| 30

Commercial and Industrial Adjustments Savings as % of C&I Sales Annual GWh (2019-2021) Weighted Average PA Potential Study 3.28% 2,700 SEM + 0.05% + 45 CHP + 0.29% + 240 Evaluation Adjustments

  • 0.03%
  • 25

Baseline Adjustments

  • 0.08%
  • 60

Linear Lighting + TBD + TBD Net Changes to Potential + 0.24% + 200 Net Potential After Adjustments 3.52% 2,900 2017 Q4 Reported Achievement 2.38% 694 Adjusted Annualized Potential 3.52% 965

slide-31
SLIDE 31

www.ma-eeac.org 2019-2021 Assessment of Potential

TOTAL ELECTRIC POTENTIAL

| 31

Portfolio Adjustments Savings as %

  • f Total Sales

Annual GWh (2019-2021) Annual Other Fuel MMBTU (2019-2021) Weighted Average PA Potential Study 3.29% 4,380 Residential Net Adjustments

  • 0.29%
  • 390

+ 1.2 Million C&I Net Adjustments + 0.15% + 200 Net Changes to Potential

  • 0.14%
  • 190

Net Potential After Adjustments 3.15% 4,190 2017 Q4 Reported Achievement 3.36% 1,574 Adjusted Annualized Potential 3.15% 1,395

slide-32
SLIDE 32

www.ma-eeac.org 2019-2021 Assessment of Potential

OTHER POTENTIAL IMPACTS

| 32

  • +

You are here (Consultant Adjusted Potential)

  • AESC values including carbon & DRIPE
  • More residential and LI focus
  • EMV changes including NTG
  • Baseline changes
  • Program mix
  • C&I vs Res and LI
  • Inclusion of fuel switching
  • Program redesign
  • Emerging markets
  • New technologies
  • Tech evolution and commercialization
  • Active demand synergies
  • Timeframe of potential – 2% per year for

10 years is still ~20% potential. It can be achieved faster. Adjustments that might occur to potential estimate:

slide-33
SLIDE 33

www.ma-eeac.org 2019-2021 Assessment of Potential

PORTFOLIO ELECTRIC COSTS

| 33

slide-34
SLIDE 34

www.ma-eeac.org 2019-2021 Assessment of Potential

PORTFOLIO ELECTRIC COST TO ACHIEVE OVER TIME

| 34

$0.215 $0.265 $0.315 $0.365 $0.415 $0.465 $0.515 2010 2011 2012 2013 2014 2015 2016 2017 2018 $/kWh

Portfolio Annual Electric Cost to Achieve

Evaluated Planned Q4 2017 Linear (Evaluated) Linear (Planned)

slide-35
SLIDE 35

www.ma-eeac.org 2019-2021 Assessment of Potential

PA POTENTIAL STUDY COSTS TO ACHIEVE

►Table below presents 2019-2021 Max achievable

annual electric costs to achieve ($/kWh)

| 35

Residential Low Income C&I Total Portfolio National Grid $0.90 $1.18 $0.75 $0.82 Eversource N/A N/A N/A $0.73 Unitil $0.95 $0.95 $0.50 $0.72 CLC N/A N/A N/A N/A PA Weighted Average $0.90 $1.17 $0.75 $0.73 2017 Q4 Reported $0.27 $1.43 $0.34 $0.34

slide-36
SLIDE 36

www.ma-eeac.org 2019-2021 Assessment of Potential

PA MAX ACHIEVABLE POTENTIAL COSTS TO ACHIEVE ARE MUCH HIGHER THAN HISTORICAL COSTS TO ACHIEVE

| 36

$0.015 $0.115 $0.215 $0.315 $0.415 $0.515 $0.615 $0.715 $0.815 $/kWh Portfolio Annual Electric Cost to Achieve Evaluated-Portfolio Planned-Portfolio Q4 2017-Portfolio Potential High Potential Low Potential Average PA April 2015 Plan

slide-37
SLIDE 37

www.ma-eeac.org 2019-2021 Assessment of Potential

ENERGY EFFICIENCY COST CURVES - ILLUSTRATIVE

| 37

Source: IESO presentation, “Module 3: Conservation and Demand Response Outlook.” August 2016

slide-38
SLIDE 38

www.ma-eeac.org 2019-2021 Assessment of Potential | 38

GAS

Res Electric 2.62% C&I Electric 3.52%

Res Gas C&I Gas

slide-39
SLIDE 39

www.ma-eeac.org 2019-2021 Assessment of Potential

PORTFOLIO ANNUAL GAS SAVINGS OVER TIME

| 39

  • 5

10 15 20 25 30 35 2010 2011 2012 2013 2014 2015 2016 2017 2018 Therms (Millions)

Portfolio Annual Gas Savings

Evaluated-Portfolio Planned-Portfolio Q4 2017-Portfolio

slide-40
SLIDE 40

www.ma-eeac.org 2019-2021 Assessment of Potential

PORTFOLIO LIFETIME GAS SAVINGS OVER TIME

| 40

  • 50

100 150 200 250 300 350 400 450 Therms (Millions)

Portfolio Lifetime Gas Savings

Evaluated-Portfolio Planned-Portfolio Q4 2017-Portfolio

slide-41
SLIDE 41

www.ma-eeac.org 2019-2021 Assessment of Potential

PA POTENTIAL STUDY RESULTS

►The table below presents 2019-2021 Max achievable

annual gas savings as a % of sales

| 41

PA Contractor Residential Low Income C&I Portfolio Total Columbia Dunsky 3.12% 1.19% 3.21% 2.95% Eversource Dunsky 3.14% 2.29% 1.84% 2.37% Unitil GDS 1.04% 1.38% 2.62% 2.20% Liberty GDS 1.45% 1.33% 0.64% 1.12% National Grid Navigant 1.07% 2.19% 0.88% 1.01% Berkshire GDS 0.67% 1.15% 0.58% 0.65% PA Average 1.81% 1.84% 1.27% 1.54% 2017 Q4 Reported 1.22% 2.03% 0.99% 1.15%

slide-42
SLIDE 42

www.ma-eeac.org 2019-2021 Assessment of Potential

PA POTENTIAL STUDY GAS SAVINGS ESTIMATES COMPARED TO PAST PLANNING PERIODS

| 42

  • 10

20 30 40 50 60 70 80 Therms (Millions)

Portfolio Annual Gas Savings

Evaluated Planned Q4 2017 Columbia % of Sales Eversource % of Sales Unitil % of Sales Liberty % of Sales

  • N. Grid % of Sales

Berkshire % of Sales Potential (Average) PA April 2015 Plan 2.95% (Columbia) 2.20% (Unitil) 1.54% (PA Average) 1.12% (Liberty) 1.01% (National Grid) 2.37 (Eversource) Berkshire (0.65%) 1.15%

slide-43
SLIDE 43

www.ma-eeac.org 2019-2021 Assessment of Potential

CONSULTANT KEY CONSIDERATIONS

| 43

Residential

  • Behavior
  • Program redesign
  • Evaluation
  • Baseline changes

C&I

  • SEM
  • Upstream changes
  • Evaluation
  • Baseline changes
slide-44
SLIDE 44

www.ma-eeac.org 2019-2021 Assessment of Potential

RESIDENTIAL GAS POTENTIAL

| 44

Residential Adjustments Savings as %

  • f Res Sales

Annual therms (2019-2021) Weighted Average PA Potential Study 1.81% 62 Million Behavior + 0.40% + 13 Million Program Redesign + TBD + TBD Net Changes to Potential + 0.40% + 13 Million Net Potential After Adjustments 2.20% 75 Million 2017 Q4 Reported Achievement 1.22% 14 Million Adjusted Annualized Potential 2.20% 25 Million

slide-45
SLIDE 45

www.ma-eeac.org 2019-2021 Assessment of Potential

C&I GAS POTENTIAL

| 45

Commercial and industrial Adjustments Savings as % of C&I Sales Annual therms (2019-2021) Weighted Average PA Potential Study 1.27% 49 Million SEM + 0.05% + 2 Million Upstream +/- TBD +/- TBD Evaluation

  • 0.09%
  • 3.5 Million

Baseline

  • 0.09%
  • 3.5 Million

Net Changes to Potential

  • 0.13%
  • 5 Million

Net Potential After Adjustments 1.14%

  • 44. Million

2017 Q4 Reported Achievement 0.99% 10.5 Million Annualized Potential After Adjustments 1.14% 14.5 Million

slide-46
SLIDE 46

www.ma-eeac.org 2019-2021 Assessment of Potential

TOTAL GAS POTENTIAL

| 46

Portfolio Adjustments Savings as % of Total Sales Annual Therms (2019-2021) Weighted Average PA Potential Study 1.54% 118 Million Residential Net Adjustments + 0.18% + 13 Million C&I Net Adjustments

  • 0.07%
  • 5 Million

Net Changes to Potential + 0.11% + 8 Million Net Potential After Adjustments 1.65% 126 Million 2017 Q4 Reported Achievement 1.15% 27 Million Adjusted Annualized Potential 1.65% 42 Million

slide-47
SLIDE 47

www.ma-eeac.org 2019-2021 Assessment of Potential

PORTFOLIO ANNUAL GAS COST TO ACHIEVE OVER TIME

| 47

$0.00 $1.00 $2.00 $3.00 $4.00 $5.00 $6.00 $7.00 $8.00 $9.00

2010 2011 2012 2013 2014 2015 2016 2017 2018 $/therm

Portfolio Annual Gas Cost to Achieve

Evaluated-Portfolio Planned-Portfolio Q4 2017-Portfolio

slide-48
SLIDE 48

www.ma-eeac.org 2019-2021 Assessment of Potential

PA POTENTIAL STUDY GAS COSTS TO ACHIEVE

►The table below presents 2019-2021 Max achievable

annual gas costs to achieve ($/therm)

| 48

PA Residential Low Income C&I Portfolio Total Eversource N/A N/A N/A $24.02 National Grid $14.36 $30.57 $7.49 $12.60 Columbia N/A N/A N/A $12.48 Berkshire N/A N/A N/A N/A Liberty N/A N/A N/A N/A Unitil N/A N/A N/A N/A PA Average N/A N/A N/A $15.51 2017 Q4 Reported $8.32 $20.12 $4.20 $7.70

slide-49
SLIDE 49

www.ma-eeac.org 2019-2021 Assessment of Potential

PA POTENTIAL STUDY GAS COST TO ACHIEVE ESTIMATES COMPARED TO PAST PLANNING PERIODS

| 49

$0.00 $5.00 $10.00 $15.00 $20.00 $25.00 $/therm

Portfolio Annual Gas Cost to Achieve

Evaluated Planned Q4 2017 Potential (High) Potential (Low) Potential (Average) PA April 2015 Plan

slide-50
SLIDE 50

www.ma-eeac.org 2019-2021 Assessment of Potential | 50

PORTFOLIO

Res Electric 2.62% C&I Electric 3.52% Res Gas 2.20% C&I Gas 1.14%

slide-51
SLIDE 51

THANK YOU

Questions?

slide-52
SLIDE 52

www.ma-eeac.org 2019-2021 Assessment of Potential

RESIDENTIAL CONSIDERATIONS: LIGHTING

►Consultants estimate even steeper lighting savings drop

than Eversource potential study

►By 2021, total annual lighting savings are projected to

decline by ~82% compared to 2017

►Would result in a ~64% reduction in total Residential annual

electric savings in 2021 compared to 2017

►PA studies did not incorporate most recent evaluation

findings into their results

►2019-21 evaluation agreed-to values are much lower (~50%

vs 35% and declining) than assumed in PA potential studies

►Further, PA study lighting NTG values vary

| 52

slide-53
SLIDE 53

www.ma-eeac.org 2019-2021 Assessment of Potential

INDIVIDUAL PA POTENTIAL COMPARED TO HIGHEST PA ESTIMATE OF POTENTIAL

| 53

500,000 1,000,000 1,500,000 2,000,000 2,500,000 National Grid Eversource CLC Unitil MWh

Annual Potential Savings by PA

Study % Savings High PA % Savings

slide-54
SLIDE 54

www.ma-eeac.org 2019-2021 Assessment of Potential

RESIDENTIAL CONSIDERATIONS: LIGHTING

►While PA studies anticipated reductions in lighting

net to gross, 2019-2021 evaluation agreed-to values are much lower

►Further, PA study lighting NTG values vary

| 54 0% 10% 20% 30% 40% 50% 60% 70% 80% 90% 100% 2016 2017 2018 2019 2020 2021

LED Net to Gross Values

Statewide Plan/Proposed National Grid Eversource CLC

slide-55
SLIDE 55

www.ma-eeac.org 2019-2021 Assessment of Potential

PROGRAMS INSTALLED A GREATER PROPORTION OF LEDS THAN PAS PLANNED

| 55

0% 20% 40% 60% 80% 100% 120% 2016 2017

%LEDs