Opening of Proposals - Olive WTP Solar GESC Proj No 124-050 - Ameresco Inc

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AEREOEnergy Solutions G G r�m For Every Need Ameresco's Valued Approach I Immediate and Long Term Ameresco's experience as an ESCO contractor and owner/operator allows us to create a project for South Bend that not only provides best value today but also ensures value into the future by considering future operating needs and costs. This includes incorporating the following aspects in the project design: • Design to minimize life cycle costs, not to minimize initial costs. • Design for resiliency and redundancy. • Train for long term operation. • We continuously add value with skilled measurement & verification of savings and operations & maintenance services to ensure savings are achieved and persist. • Our vendor and technology neutral approach ensure the best solution for each customer and each project. General Project Approach I Comprehensive Vendor -Neutral Analysis System Design I Right Size Distribution Systems Our dedicated renewable energy team works with customers to right -size distributed generation solutions to balance or offset reliance on the grid and maximize the sustainability and financial benefits of renewable energy, battery storage, and advanced energy controls. Ameresco's engineers conducted a site visit with potential subcontractors to provide pricing on the proposed design. Upon contract award, Ameresco will conduct further visits to access the well buildings and perform testing to document the surface and subsurface conditions of the proposed areas for the PV arrays. Ameresco also performed a utility analysis to determine the right system size to install at the facility. While there are opportunities to decrease load at the facility such as replacing the T5 lamps with new LED light bars and drivers and replacing the failing condensing unit, we also heard that the facility may become used more in the future, which would result in any energy savings being offset. Therefore, the results of our analysis will still represent the best value for the City. As meter 611322382, which corresponds to Wells 1-2 & Off, represented the bulk of the energy use in the October 2024 bill and had readily available data, we focused this project on offsetting the electricity use from this meter with solar. Additional systems could be installed for the other meters, but would require additional interval data to determine the economic feasibility. Based on the October bill, the remaining meters would need smaller systems which are more expensive to install and therefore may not be economically viable. We modeled several different solar array sizes and compared the hourly solar production to the interval electrical consumption data. Due to the significantly lower value of energy exported to the grid compared to energy consumed on site, we determined that a midsize system with some export would benefit from economies of scale while not significantly overproducing on an hourly basis. Careful review of the drawings provided additional insight into the electrical architecture of the site. The drawings indicate an original overhead system that served the wells. This system was likely a higher voltage system which is supported by the wire sizes on the drawings and the presence of abandoned transformers at some of the wells. The 2018 GAC Upgrade drawings contain a Power Distribution Functional Diagram with a 225kVA utility owned transformer serving the meter for this building. We noted a maximum demand on meter 611322382 of 289kW which would not be feasible for the 225kVA transformer that was serving the building. Therefore, the distribution gear for this meter cannot be located at GAC. The electrical panel within the office building is a 480V, 600A panel that did not appear to be the main distribution panel for the meter, either. Since we were also not able to identify main switchgear within the office building, we feel that it is a reasonable assumption that there is electrical distribution gear within building 1A or 1 B which serves well 1. Entrance into this building along with the building associated with well 2 would confirm the electrical distribution currently on -site. Based on the voltage and rated amperage, the capacity of the gear within the office is over 498kW. Based on this analysis, Ameresco recommends installing a 514kW-DC/ 400kW-AC fixed tilt solar array that is expected to produce 626,852kWh in year one which will provide the best value to the City. City of South Bend, IN I Department of Public Works I RFQ Guaranteed Energy Savings Contract