#1Rhode Island Energy™ a PPL company Special Commission for the Placement of Solar Panels on Interstate Highways December 6, 2023 BUSINESS USE ORhode Island Energy#2Agenda • • • Interconnection Summary Interconnection Process & Challenges Contact Information BUSINESS USE ORhode Island Energy 2 Rhode Island Energy™ a PPL company#3Interconnection Summary BUSINESS USE ORhode Island Energy 3 Rhode Island Energy™ a PPL company#4Total MW interconnected to-date and in queue 616 MW Interconnected as of November 27, 2023 Solar breakdown ■Solar Wind■ Hydro BUSINESS USE ORhode Island Energy 4 Rhode Island Energy™ a PPL company • 135 MW from systems under 25 kW • 481 MW from systems over 25 kW Remaining MW in queue 573 MW Total connected applications to date • 22,637#5Interconnection Process & Challenges BUSINESS USE ORhode Island Energy 5 Rhode Island Energy™ a PPL company#6Interconnection statutes and tariffs Rhode Island Energy™ a PPL company Distributed Generation (DG) Interconnection Statute R.I. Gen. Laws § 39-26.3 R.I. Gen. Laws § 39-26.6 Renewable Energy Growth Net Metering R.I. Gen. Laws § 39-26.4 Tariff Standards for Connecting Distributed Generation: RIPUC 2258 (September 1, 2022) Renewable Energy Growth Program for Residential and Non- Residential Customers RIPUC 2151-1 (April 1, 2022) RIPUC 2152-1 (April 1, 2022) Net Metering Provision: RIPUC 2257 (September 1, 2022) RIPUC 2268 (Pending, Docket 23- 05-EL) BUSINESS USE ORhode Island Energy 6#7Interconnection process overview Pre-App Application Screening Feasibility Study Engineering Review Interconnection Witness Test Service Agreement (ISA) Construction Meter Install BUSINESS USE ORhode Island Energy Pre-ISA 7 Post-ISA Rhode Island Energy™ a PPL company Asset Registration Authority to Interconnect (ATI)#8Pre-ISA . Rhode Island Energy™ a PPL company All proposed interconnections 250 kW and greater will submit a pre-application . Applications are on a per-site basis • Optional feasibility study after application and screening • Engineering Review • • Study the system to determine adverse impacts Identify the scope of work and cost associated with interconnection Executed Interconnection Service Agreement (ISA) The contract between the Customer & Electric Distribution Utility Identifies the terms and conditions, timeline, scope of work, and payment schedules BUSINESS USE ORhode Island Energy 8#9Engineering considerations when applying to connect ● . Rhode Island Energy™ a PPL company RI Energy offers an overview of Distributed Generation (DG) hosting capacity via its System Data Portal: https://systemdataportal.nationalgrid.com/RI/ This includes hosting capacity for a particular substation and/or feeder capacity shown in a color code by percent available. Large influx of DG has rendered some substations and feeders at their limit of hosting capacity. This means any significant sized generator will tip the scale and trigger need for system upgrades when applying for interconnection. . These types of feeders are placed on a challenging feeder list. A pre-application report (required for 250KW or greater) indicate if interconnecting customer is in the vicinity of a challenging feeder. BUSINESS USE ORhode Island Energy 6#10Engineering considerations when applying to connect +0 Introduction FAQ Company Reports Distribution Assets Overview Heat Map Hosting Capacity Sea Level Rise NWA Rhode Island Hosting Capacity Find address or place brings ☐☐ wwwww Windham Storrs 890 Willimantic Windham a Harford R Putnam 701 Danielson Plainfield London Colchester Town of Norwich Pachaug State Forest- Chapman 530 ft ft iles ex BUSINESS USE ORhode Island Energy New London CONNEC Proven ent Sphing Arcadia Management Te 1902 Scroate servoir Bar ast Enwich Rhode Island Energy™ a PPL company Nortor Legend Attleboro Winthrop St MASSACHUSETTS BLAND is ett Worden Pond Narragansett Bay esto 10 tsmout F RISDP Hosting Capacity Feeder Level Data 3 Phase (MW) Less than 0.30 0.30-0.49 0.50 -0.99 1.00 -1.99 1.50 1.99 2.00-2.99 3.00 -4.99 Greater than 5.0 Coming Soon Substation Level Data 3 Phase (MW) Less than 0.30 0.30-0.49 0.50 -0.99 1.00 1.99 1.50 -1.99 2.00 2.99 3.00 -4.99 Greater than 5.0 Coming Soon#11Post-ISA • Construction ● • RIE construction and Customer construction • Municipal inspection is required during construction Rhode Island Energy™ a PPL company At the conclusion of construction prior to interconnection, there is a Witness Test (WT) This ensures that the system is programmed correctly and operates as expected Meter will be set after the conclusion of the WT All systems 25 kW and above will be registered with ISO-NE Systems 5 MW and above will be fully dispatchable by ISO-NE BUSINESS USE ORhode Island Energy 11#12Rhode Island Energy™ a PPL company Thank You! Erica Russell Salk Manager, Customer Energy Integration [email protected] Nicholas Ucci Director of Government Affairs [email protected] BUSINESS USE ORhode Island Energy 12