Here is my situation-Im from India ,im planning to buy a seasonic SII 62OW PSU.My current PSU is iball sprinter 600W and the UPS is normal wep500w UPS.The problem is i had seen several discussions related problems of non sine wave UPSs.My home has a sinewave inverter(from Igo) ie: Inverter>UPS>PSU. Will this results in issues,when main power is off?The PSU is Active PFC.All the other good PSU's out there cooler master,corsair etc is Active PFC.Can some one help me please.