For my thesis, how do i calculate a MPPT's efficiency in different temperature and irradiation levels? Should I divide the actual power produced by the expected value (actual/expected*100)? I have a simulation made on matlab, so i can get the actual value from there, but i dont know how to calculate the expected value.
For example at STC (1000w/m2 and 25C) the 4 panels are rated at 250W each and my output is 976W. So I can calculate my mppt's efficiency by (976/(250x4)x100) which come to be 97.6%. Now how do i do this with 300 w/m2 and -46C ? my mppt is giving 84.35w but i dont know the expected output at these conditions. How do i calculate the expected output? Are there any formulas i can use? I have 4 panels in series, the name and specs are below:
Tata Power Solar Systems TP250MBZ:
Power at STC (W) 250
Power at PTC (W) 222.7
Bifacial No
Bifaciality (%) -
Lower Power Tolerance (%) -
Upper Power Tolerance (%) -
Power Density at STC (W / m2) 151.515
Power Density at PTC (W / m2) 134.97
Module Efficiency (%) -
Cell Efficiency (%) -
Vmp: Voltage at Max Power (V) 30.0
Imp: Current at Max Power (A) 8.3
Voc: Open Circuit Voltage (V) 36.8
Isc: Short Circuit Current (A) 8.83
Max System Voltage (V) -
Series Fuse Rating (A) -
Bypass Diode -
Nominal Operating Cell Temp (°C) 48.8
Open Circuit Voltage Temp Coefficient (% / °C) -0.33
Short Circuit Current Temp Coefficient (% / °C) 0.064
Max Power Temp Coefficient (% / °C) -0.438
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