Performance of off-grid solar based agricultural water pump controller

This paper provides a performance evaluation of a 5.625 kW/7.5 Hp rated off-grid solar based agricultural water pump controller used for irrigation purposes. The performance evaluation was carried out as per IS/IEC61683-1999 (Reaffirmed 2020) standard and it was observed that the controller is able to deliver rated power with a maximum efficiency of 98.11% at a nominal operating voltage of600 V DC. Current harmonics exceed 5% limits at 25% and 50% loads, power factor increases with increase in percentage loads and with full load at 480 V dc input, the power factor is 0.85. Efficiency tolerance based on guaranteed efficiency calculations is observed to be -0.55%.