... AS4777 DK5940 RD1663 3, +5 Years Warranty single phase PV inverterDeveloped for private homes, high-rise ... frequency,under frequencyIslanding operation detectionPassiveVoltage phase jump detectionActiveReactive power controlInterfaceRS232(standard),USB,RS485;Dry contact, ... 2000M/0~6600ftHumidity Safety ConformanceQuality AssuranceISO9001 CertifiedEMC Standard SafetyVDE0126-1-1,EN50178,IEC62103,DK5940, ...