... power system, no need to change, low cost Rectifier Moduletheory for the UPS replacement by ... 3%Cooling methodSelf-cooking, or forced cooling with fanProtocalRS485, RS232Accoustic noise<60dBProtectionMulti-protectionMulti-protection including ... , the rectifiers features high efficiency with low EMI (7) low difference active load sharing of rectifiers ... - 240V DC system, low cost, high reliability