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AMERESCO4. <br />Solar Photovoltaic Systems Measurement & Verification Plan <br />M&V Process <br />The M&V protocol for this measure is based on IPMVP Option B. Actual energy production (kWh) of the <br />PV systems and any environmental conditions that may affect they system's capacity to produce <br />energy will be measured and recorded utilizing utility revenue -grade metering and the Customer <br />selected data acquisition system (DAS). <br />The ability of the system to perform as predicted by the production model will be validated through a <br />linear regression capacity test, performed during system commissioning, following methods set in <br />ASTM E2848-13: Standard Test Method for Reporting Photovoltaic Non -Concentrator System <br />Performance. The regression analysis will utilize at least two weeks of post -installation production data <br />and data from the PVSYST model. This test documents the actual performance of the system for a <br />given set of conditions as compared to the modeled performance of the system for the same set of <br />conditions. The regression for the actual data and the PVSYST model will be accepted if the R- <br />Squared values are greater than, or equal to, 0.975. The PV system performance will be deemed to <br />meet the guarantee if the commissioning test returns a Tested Output Ratio greater than, or equal to, <br />0.95. This ratio validates that the actual performance of the system is consistent with the modeled and <br />guaranteed performance of the system <br />In the event that the Test Output Ratio does not meet .95, Ameresco will perform further <br />troubleshooting of the system to determine any deficiencies that are causing the reduction in <br />performance. Corrective actions will be made as needed, and the test will be repeated to evaluate the <br />impacts of the corrections. If the Tested Output Ratio does not exceed .95 despite the corrective <br />actions performed by Ameresco, the savings shortfall will be calculated for the current and subsequent <br />M&V performance years. <br />Ameresco will also perform monitoring of the actual performance over the term of the project. This <br />monitoring will provide the customer with actual energy production of the system, along with a <br />calculation of the impact of differences in production as a result of natural weather condition variation, <br />or possible maintenance issues with the system. <br />Ameresco will periodically review the data acquisition system web platform to monitor real-time and <br />historical performance of the PV systems as well as weather parameters, system downtime, and any <br />trends of underperformance. <br />Metering Plan <br />The metering plan is separated into Measured and Monitored Variables. Measured Variables will be <br />used to calculate energy production of the PV system. Monitored Values are key parameters that <br />directly impact the performance of the ECM and will be used to adjust the model in cases of significant <br />deviation from expected values. These parameters will be monitored to ensure proper operation of the <br />system and persistence of savings over time. Data will be collected, stored, and accessed through the <br />DAS, which will be accessible by the Customer. <br />City of South Bend, IN I Department of Public Works I RFQ Guaranteed Energy Savings Contract <br />