Determination of temperature coefficients of open-circuit voltage and short-circuit current of multi-crystalline silicon solar cells using empirical approach
The temperature coefficients of short- circuit current (α) and open-circuit voltage (β) were determined from the measured data. 45 Watts and 70 Watts multi-crystalline Silicon Solar cells, 100Ah battery, 0.5kVA inverter and digital thermometer were employed for the data collection. These equipment were set up in the University of Port Harcourt environs (latitude 40 55’ 58” North and longitude of 60 59’ 55” East ) during the period of October to December. The power output of multi-crystalline silicon solar cells decreases by every 0C rise in temperature above the operating temperature. Typically, multi-crystalline silicon solar cells rated 45 Watts power output decreases by 63% while 70 Watts power output decreases by 48% for every 0C rise in operating temperature.