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Operation and Maintenance Plan Solar O&M Overview for: Northen Gateway Renewables, LLC & Southern Gateway Renewables, LLC Submitted by: Will Thompson Senior Vice President Contact: wthompson@nexamp.com 978-653-4448 101 Summer Street, 2nd Floor Boston, MA 02110 Nexamp Asset Management Services Solar PV Operations & Maintenance Experience, Assets & Leadership 2 Overview Nexamp’s veteran team of power and solar professionals understands what it takes to manage, maintain and deliver maximum revenue from solar plants. We provide full spectrum asset management and operations and maintenance services for our own, as well as third party systems. Our team actively monitors and provides preventative, corrective and condition-based maintenance for over 180 MWs of PV at 150 commercial, residential and government owned plants. Service Offerings The following services are typically included in either our management or services agreements. Examples of our most commonly requested services include: • 7/365 active monitoring and tailored performance reporting • Renewable energy attribute management, aggregation and sales • Full spectrum service and scheduled maintenance • Warranty and spare parts management • Performance guarantee management • Site storm water controls maintenance and improvements • Array and overhead vegetation management • Original equipment manufacturer warranty support • Third party commissioning and performance testing • Aerial infrared inspections, photography and analysis • Module snow removal from ground mounted and carport arrays • Module washing in accordance with manufacturer requirements Figure 1. Compromised string located through drone infrared inspection. 3 Scope of Work MONITORING AND REPORTING • Seven-day, Nexamp Energy Center (NEC) support and real time monitoring of owner’s data acquisition system (DAS) and alert management system. • Monthly reporting of actual performance verses PVSyst performance model. ANNUAL SCHEDULED MAINTENANCE • Visually inspect all feeder terminations for corrosion. • Visually check power terminations/connections including DC combiner boxes, DC and AC disconnects, inverters and PV modules and re-torque as necessary. • Test ground continuity and correct any unsafe or abnormal issues. • Check all fuses in inverters, combiner boxes, and disconnects (AC&DC). • Test and record voltage and amperage of the arrays at the string level and provide data values in summary report. • Inspect combiner boxes, disconnects (AC&DC), and inverters with an infrared camera to detect damage, hotspots, loose connections, etc. • Check mechanical and structural integrity of the system. • Inspect and clean inverter heat sinks and replace inverter air filters where applicable as necessary. • Check and replace unserviceable or missing system labeling as necessary. • Remove accumulated trash and debris. Check arrays for shading, including such shading caused by vegetation. • Check modules for excessive dirt and debris. • Provide documentation to include summary report of findings including actions taken and recommendations for additional maintenance or repairs. REPAIR SERVICES • Respond to alarms, alerts, and service requests pertaining to the Facility within 24 hours of such alarm, alert, or service request, as personnel safety and weather conditions permit. • Provide all warranty, spare parts and other repair or maintenance related activities on a time and materials basis. 4 Leadership, Background, Experience & Qualifications Will has over 25 years of construction know- how, with 13 focused in renewables implementation and life cycle management. He is a NABCEP Certified PV Installation Professional, FAA Certified Remote Pilot, and holds various licenses and registrations in MA, RI and NY. Will earned a BS in environmental engineering from Tufts University and an MS in homeland security from Endicott College. Will is a U.S. Army Iraq War veteran who continues to serve in the U.S. Coast Guard Reserve. Skip manages all scheduled and un-scheduled maintenance, warranty and OEM support services, as well as new system commissioning. Skip has over 15 years of residential development knowledge and 10 years of experience installing and maintaining PV, solar thermal, geothermal and micro wind systems. Skip graduated from the Tilton School and is a MA licensed Construction Site Supervisor. Brad has nine years of experience in the renewable energy industry and over 15 years in information technology systems. Brad earned a BA from the University of Massachusetts and a graduate certificate in PV Design and Installation from San Juan College. He holds a NABCEP Certified PV Entry Level certification, PMP project management certificate from PMI, and is also a Certified Novell Network Engineer. Bo’s team drives revenue recognition, REC trading, state and federal program compliance, and contract management for Nexamp’s growing energy portfolio. Bo has over five years of experience in renewable energy, energy efficiency, and renewable portfolio standard policy development. He earned a BA in Biochemistry from Middlebury College. Will Thompson SVP, Nexamp Asset Management Services Nexamp co-founder Skip Provost VP, Operations & Maintenance Bowen Burditt Director, Asset Management (AM) Brad Zollner VP, Nexamp Energy Center (NEC) 5 Current Managed Asset Base • Total Nexamp owned MWs: 107 (DC) at 85 sites • Total third party owned MWs: 25 (DC) at 63 sites • Service Area: CA, CT, DE, GA, MA, MD, NH, NY, RI and VT • Facility Capacities: 3kW – 7.5MW (DC) • Facility Ages: 2007-2019 Partial Project List – Systems Currently Under Management Project State Customer Type CAPACITY (MW DC) YEAR in Operation GE Aviation Newark DE Current by GE Ground & Carport 0.89 2016 Terrapin Branch MD Nexamp Ground 1.19 2018 Barnstable WPCF MA Town of Barnstable Ground 0.82 2011 Boston Properties Bay Colony MA Healthy Planet Partners Carport 0.84 2014 Newfield Solar NY Nexamp Ground 7.48 2019 Richmond Solar RI Nexamp Ground 0.50 2015 Harrison Solar NY Nexamp Rooftop 0.65 2016 President Container NY Current by GE Ground 2.09 2015 Bainbridge Solar GA Nexamp Tracker 1.25 2019 PVN Milliken CA Nexamp Landfill 3.17 2017 6 Reporting and Monitoring REPORTING Nexamp provides customer tailored performance reporting of actual versus modelled electricity production. Reports may be generated on a monthly, quarterly, annual and lifetime basis, to include weather adjusted values, financials, etc. Performance Reports are generated using excel data generated by the data acquisition system (DAS) meters and utility account data, where available. Scheduled O&M reports are generated in Word and sent via email. Reports for repair services are logged in our proprietary asset management platform (described below) and forwarded automatically via email upon resolution. MONITORING Nexamp provides system performance monitoring via the data acquisition system (DAS) PowerTrack which is a hardware and cloud-based software solution offered by the third party monitoring service provider AlsoEnergy (AE). AE leads the industry in independent monitoring and fleet management software and analytics. PowerTrack provides power and production data, environmental conditions, alert messaging, and equipment parameters from the plant’s inverters, subarrays and production meters. It also serves as the third party verifier of actual energy production required for the generation and sale of renewable energy attributes. A screenshot of the end-user interface is shown below for a Nexamp array in Maryland. A detailed video tutorial is available at: https://www.youtube.com/watch?v=LasmmYVi_zo Figure 3. AlsoEnergy PowerTrack data acquisition system user interface. 7 PROPRIETARY ASSET MANAGEMENT PLATFORM In addition to the third party monitoring systems described above, the NEC tracks and manages fleetwide maintenance and asset management activities, outages, system analytics, automated reporting and organizational contacts using Nexamp’s own proprietary software platform. Figure 4. Map view of Nexamp’s managed asset portfolio. 8 Why Nexamp? EXPERIENCE • Capability: Nexamp has an established track record of expertise in solar system maintenance, original equipment manufacturer repair and electrical construction and operations, with trained electricians on staff and a host of supporting subcontractor relationships based throughout our U.S. markets. • Expertise: Your plant is monitored by the Nexamp Energy Center. Our staff of competent and proactive analysts track production in real time, detect faults and mitigate system issues every day including weekends and holidays. • Technology: Our personnel use the best available testing equipment to ensure peak performance during every maintenance inspection we perform. Testing is completed using certified tools from Kipp & Zonen®, Solmetric®, Seaward®, SolarBOS® and FLIR®, with results incorporated into our maintenance reports. • Financial stability: Nexamp has proven itself in the solar business for over 12 years, has a solid financial standing and maintains a strong balance sheet. • Customer service: We provide the same expert level of care, rapid response and attention to detail that we apply to Nexamp’s owned and operated assets. SAFETY Safety is of the utmost importance to Nexamp. We create and maintain site specific health and safety plans tailored to each plant. Members of our team hold either OSHA 10, 30 or 40 level certifications and all are CPR/First Aid trained. Our employees complete a variety of electrical safety and code related training on an ongoing basis and always wear the appropriate personal protective equipment. Figure 5. The Nexamp Energy Center In addition, Nexamp's provides first respondent training before construction begins on the facility and after construction is completed. Nexamp will work with the County and Town to schedule these meeting and site visits accordingly. Please see the following example agenda for training provided by Nexamp: 5MW AC Solar Only Facility First Respondent Training Report Date: Nexamp Page 1 • Meeting attendance sign in • Site Access. Gate locations, Access points, Lock key locations • Site Description. PV information: Site Mw, number of panels. • Site Layout Site features, perimeter and center road layout, perimeter fence. • Site Equipment Number of inverters, transformers and switchgear, combiner box locations • Start up and Emergency Shutdown Procedures Utility and Site load break switches on site with dual utility recloser units, Switchgear and inverter disconnects at both pad locations. • Meeting Q&A Northern Gateway Renewables, LLC & Southern Gateway Renewables, LLC Training Meeting Agenda: Report Date: Nexamp Page 2 • NEXAMP FIRST RESPONDERS TRAINING SIGN-IN SHEET Project: Northern & Southern Gateway Renewables, LLC Meeting Date: TBD Facilitator: Nexamp Team Place/Room: On site Name Title Organization 5MW AC Solar Only Facility First Respondent Training