SpecificationsGrowatt 4400Input data Max. DC power4400WMax. DC voltage580VPV voltage range MPPT120V-500VMax. number of parallel strings3Number of MPP trackers1MPPT input current0-20AMax DC input Isc current27AOutput (AC) Nominal AC ouput4200WMax. AC power4400WMax. output current21ANominal AC voltage range220 V – 240 V / 180 V – 280 VAC grid frequency range50 Hz, 60 Hz /± 5 HzPhase shift (cos φ)1THDI<3%AC connectionSingle phaseEfficiency Max.efficiency97.8%Euro-eta97.4%MPPT efficiency99.5%Protection devices DC reverse polarity protectionyesAC short-circuit protectionyesGround fault monitoringyesGrid monitoringyesIntegrated all-pole sensitive leakage current monitoring unityesGeneral Data Dimensions (W / D / H) in mm362/406/136Weight15.7KGOperating temperature range–25 °C ... +60 °CContinuous full output power temperature range–25 °C ... +55 °CNoise emission (typical)≤ 25 dB(A)Consumption: operating (standby) / night<5 W / < 0.5 WTopologyTransformerlessCooling conceptNo fanInstallation: Indoors / Outdoors (IP65 electronics )yes /yesFeatures DC connection:(MC3/MC4,H4)opt/yesAC connection: TerminalsyesLCD displayyesInterfaces: Bluetooth / RS485/RS232opt/opt/yesWarranty: 5 years / 10 yearsyes /optCertificates and approvals: CE/TUV/DK 5940/G83 EN 50178,VDE 0126-1-1, ,EN6100-3-2 EN61000-6-1,EN61000-6-2,EN61000-6-3,EN61000-6-4 ,IEC-62109 , RD 1663