Calculation of Measured Performance Ratio Sample Clauses

Calculation of Measured Performance Ratio. The Measured Performance Ratio ("MPR") represents the PV System's measured AC power output compared to its theoretical DC power output as adjusted for the plane of array irradiance conditions measured at the Site [Drafting Note: May require revision for DC output]. The gross PV System output in MW and MVAR will be measured at such point mutually agreed to by the Parties on the Facility's single-line diagram attached hereto as Attachment E (Single-Line Drawing and Interface Block Diagram). Following the end of each MPR Assessment Period, the MPR shall be calculated for such MPR Assessment Period (using the previous 12 months of data) as follows: Where: = each 15-minute interval during the MPR Assessment Period where the inverter input voltage exceeds the PV System inverters minimum level for production is the measured AC power output of the PV System measured at the inverters averaged over time period in MW = plane of array irradiance at the standard condition of 1,000 is the DC rated capacity of the PV System at the standard test conditions of 1,000 W/m2 and 25°C (MW), (i.e., the DC power rating of the PV panels at standard test conditions multiplied by the number of PV panels in the Facility); is the measured plane of array irradiance averaged over time period i ( / ); = cell temperature computed from measured meteorological data (°C) averaged over time period i. = average cell temperature computed from one year of weather data using the project weather file (°C) δ = temperature coefficient for power (%/°C, negative in sign) that corresponds to the installed modules Tcell_i = GPOA * e(a+b*WS) +Ta Where: Tm = module back-surface temperature [°C] GPOA = POA irradiance from calibrated reference cells [W/m2] Ta = ambient temperature [°C] WS = the measured wind speed corrected to a measurement height of 10 meters [m/s] a = empirical constant reflecting the increase of module temperature with sunlight b = empirical constant reflecting the effect of wind speed on the module temperature [s/m] e = Euler's constant and the base for the natural logarithm. Glass/cell/glass Open rack -3.47 -0.0594 Glass/cell/glass Close-roof mount -2.98 -0.0471 Glass/cell/polymer sheet Open rack -3.56 -0.0750 Glass/cell/polymer sheet Insulated back -2.81 -0.0455 Polymer/thin-film/steel Open rack -3.58 -0.1130 The time periods used in the foregoing calculation shall be only periods during which, for the entire 15-minute interval, the PV System output is allowed to convert all irradianc...
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Calculation of Measured Performance Ratio. (i) The Measured Performance Ratio ("MPR") represents the PV System's measured AC power output compared to its theoretical DC power output as adjusted for the plane of array irradiance conditions measured at the Site [Drafting Note: May require revision for DC output]. The gross PV System output in MW and MVAR will be measured at such point mutually agreed to by the Parties on the Facility's single- line diagram attached hereto as Attachment E (Single-Line Drawing and Interface Block Diagram). (ii) Following the end of each MPR Assessment Period, the MPR shall be calculated for such MPR Assessment Period (using the previous 12 months of data) as follows: = ∑ _ ∑ [ ( ) (1 − 100 (__ − _)] Where: = each 15-minute interval during the MPR Assessment Period where the inverter input voltage exceeds the PV System inverters minimum level for production is the measured AC power output of the PV System measured at the inverters averaged over time period in MW = plane of array irradiance at the standard condition of 1,000 /2 is the DC rated capacity of the PV System at the standard test conditions of 1,000 W/m2 and 25°C (MW), (i.e., the DC power rating of the PV panels at standard test conditions multiplied by the number of PV panels in the Facility); is the measured plane of array irradiance averaged over time period i (/2); _ = cell temperature computed from measured meteorological data (°C) averaged over time period i. __ = average cell temperature computed from one year of weather data using the project weather file (°C) δ = temperature coefficient for power (%/°C, negative in sign) that corresponds to the installed modules Tcell_i = GPOA * e(a+b*WS) +Ta Where: logarithm.
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