National Grid Rhode Island: Piloting Wireless Alternatives Forging a Successful Program in Difficult Circumstances April 4th, 2017 Presented by: Courtney Lane Antje Flanders

Overview of Pilot Two Feeders out of Tiverton substation serving Tiverton & Little Compton, RI 5,200 customers (80% residential) Summer afternoon/evening peak Forecasted to be overloaded during peak hours starting in 2014 Wires solution (substation upgrade): Would have cost $2.9 million in 2014 Least Cost Procurement Law (System Reliability Procurement) allows for NWAs Non-wires goal: Load relief starting in 2014, up to 1 MW by 2017; defer upgrade to 2018 Plan for NWA filed and approved in 2012 Pilot scheduled to run through 2017

Pilot design and program offerings Energy Efficiency Targeted marketing to increase volume of existing EE programs Enhanced incentives for statewide EE programs Residential and Small-Business energy assessments with direct install measures Unlimited LEDs Heat pump water heaters Pilot specific measures Window ACs Window AC Recycling Demand Response No-cost WiFi tstats (CAC) No-cost WiFi tstats and plug load devices (WAC) *discontinued in 2016 Opt-in program with annual bill credit

Evaluation of Pilot Program Opinion Dynamics conducting annual evaluations First evaluation of 2012 pilot; currently finishing up 2016 evaluation Focus on: Marketing strategies and effectiveness Pilot impacts

Where Do Savings Come From?

Marketing Efforts

Marketing Evaluation: EW Online Survey Pilot Recall Annual Online Survey with EnergyWise Participants Recall of pilot marketing Importance in participation decision Used to assess participation lift Statewide Recall

Marketing Evaluation: General Population Survey Online survey with focus on 2016 marketing efforts Direct mail Email Phone call

DR Event Analysis Event impacts based on regression modeling Central AC Events: 3-7 pm Strategy: Set-point increases by 1-3 °F Window AC Events: 4-6 pm Strategy: Units shut off for the duration of the event Event impacts based on regression modeling

DR Event Analysis – Findings CAC: 13.3% runtime reduction and 0.5 kW savings/thermostat WAC: 0.04 kW savings per thermostat + Connectivity issues = Lower Than Expected Savings Potential solutions Real-time connectivity assessment Pre-cooling season outreach

Outlook for pilot Pilot on track to meet goals 2017 Enhancements Create 1MW of load relief by end of 2017 Defer substation upgrade by 4 years Projections show deferral until 2018 2017 Enhancements 2017 Plan includes an RFP for 250 kW of load relief. Results expected in 2017 on coordinated effort with with RI Solarize initiative Pilot starts WAC rebates, recycling, plugs   LEDs, DR Events HPWH RFP

Questions or Comments? Courtney Lane Antje Flanders 781-907-1876 Courtney.Lane@nationalgrid.com Antje Flanders 617-301-4643 aflanders@opiniondynamics.com