Solar Photovoltaic Roof Mounted System

The Trustees of the Library are applying for several grants to help pay for this installation. Timing of the project will depend on success in receiving grant funding and whether the project needs to go to the voters in March of 2024. It is anticipated that the project will be installed in either 2023 or 2024. If the project needs to go before the voters in March 2024, and if it passes, we anticipate construction to begin soon after. It is the intent of the Wolfeboro Public Library to hire a contractor to provide and install a new Solar Photovoltaic system including all associated ancillary equipment, as well as a public educational component for the library lobby. Recommendations for the design and system sizing to obtain maximum efficiency levels for the building are to be determined by the successful contractor. The following contractor requirements are for the "Turn Key" (Design to Commission) installation of a new Solar Photovoltaic System to include but not be limited to the following services, conditions and information: o Provide new photovoltaic system: design, sizing and associated structural engineering requirements as required to install and interconnect with the preexisting building structure, electrical service, and space provisions for such. o Provide manufacturers make and model information for all proposed equipment. Preferred consideration may be given to domestically (USA) manufactured equipment. o Provide and install solar panels with a minimum 25-year warranty. o Provide and install corresponding inverter(s) with rapid shut down feature. o Provide and install panel racking system and details of roof attachment method. Panel racks and roof mounting shall not be installed in a manner which will void the roofing warranty, life expectancy and/or performance or interfere with the existing roof solar tubes. o Provide and install all AC/DC electrical production and monitoring interconnections including conduits, wiring, connectors, boxes, switches/breakers, grounding, and required labeling. o Permanently repair/patch all exterior/interior penetrations of the building's enclosures (brick/mortar/standing seam roofing/sheetrock, insulation, etc.) with an approved sealant for such material associated with the mounting, installation, cable routing and interconnection of the photovoltaic system. o To the maximum extent possible, proposals shall utilize the space constraints of the existing roof and electrical equipment spaces in order The Town reserves the right to reject any or all proposals, or accept any proposal determined to be in the best interest of the Town. The building consists of approximately 17,000 square/ft. of meeting rooms, central library, children's room, and office space. Please see attachments: A. Building elevations and B. Roof Plan. The original building was built in 1979 and a major renovation and expansion was completed in 2020 including a new roof which was built with the intention of holding a solar array. The renovated library was designed to be a net zero building, with 100% of the heat and power to come from on-site solar generated electricity. The building has been averaging approximately 100,000 kWh's of electricity on an annual basis for the past two years. Monthly usage for 2021 and 2022 is in attachment C. We anticipate slightly higher electricity use in the future for a number of reasons including 2021 had lower library usage as a result of Covid, a warmer than average 2022, and we anticipate installing a Level II EV charger in the near future. Current yearly Peak Demand readings for the facility register 50 kW. The library is electrically served by an 800Amp three-phase 208Y/120V electrical service. This consists of an 800 amp main panel located in basement mechanical room with corresponding sub and equipment panels. Utility power is fed from a pole mounted, threephase bank of (3)37.5kVa transformers for a total of (112.5kVa capacity). Power enters the building from the pole via 3 sets of 4 # 300 KCMIL underground conductors where they enter a CT Cabinet located on the exterior of the building. Available Fault Current (AFC) at this location is 16,350 Amps @ 208Y/120V. Full building, propane powered, back-up generation is currently pending installation (awaiting equipment arrival). Future generation transfer switching equipment shall take precedence of location in regard to access and wiring.

17,000 SF.

Division 07 -

Thermal and Moisture Protection, Dampproofing and Waterproofing, Thermal Protection.