RFQ - SBFD Solar PV - Performance Services Inc

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yl r Performance Services 11. Measurement & Verification Our baseline is based on total utility bill usage for each building in which work is being performed or solar is being implemented. The utility information used in the Base Year is typically the most current full calendar year; however, considerations may be taken for recent major temporary fluctuations in utility usage that may not be typical and so suggest a different annual period that may be more representative of the building/s. Once the baseline period has been established, we complete a Utility Data Analysis for that period. We do this by collecting all the metered utility data for the building for each month for all utilities. Though the cost of energy consumption is used, we also examine the rate structure and identify transportation costs (gas) and peak demand costs (electric). This gives us a good picture of how the different utilities are consumed throughout the year and the cost impact. We also look at the pure energy consumption of a site — independent of rate cost. We do this by converting the units of kW or therms into BTUs. When comparing future energy performance to the baseline year, accommodations are given to other factors including changes in the weather or building usage to help us normalize the current year with the base year. These are discussed in more detail below. • Changes due to weather: We will compensate for changes in the weather from the base year by applying heating degree days to the utility savings during the heating months. This adjustment decreases or increases the gas usage during the baseline period according to the percentage it was either above or below the current heating degree days. • Changes in utility rates: For guarantee purposes, we determine energy savings ultimately by determining the reduction in BTUs - not utility costs. As such, in future years we apply current utility rates, unless they fall below base year rates, to the reduction in BTUs to determine actual utility savings. We monitor the utility bills and divide the total cost for the year by the total usage in order to determine if the rate has changed. • Changes to the Building Occupancy and Use: Occupancy adjustments are only made and added as a comparison at the end of the year. We typically track the equipment run time. If the hours the equipment operates during each month are above or below our guaranteed hours, then we may need to adjust the guarantee (BTU consumption) at the end of the year. • Changes to the Building Structure and Equipment: Increased energy usage resulting from increasing outside air amounts to meet current building codes, additional square footage being Confidential & Proprietary Document 11. Measurement & Verification - 1