Models 3K 3.6K 4.6K 5K 6K 8K Input DC (PV side)             Recommended max. PV array size 6 kW 7.2 kW 9.2 kW 10 kW 12 kW 16 kW Max. usable PV input power 4.8 kW 5.76 kW 7.36 kW 8 kW 9.6 kW 12.8 kW Max. input voltage 500 V Rated voltage 330 V Start-up voltage 90 V MPPT voltage range 90-435 V Max. input current 16 A / 16 A 32 A / 32 A Max. short circuit current 20 A / 20 A 40 A / 40 A MPPT number/Max. input strings number 2/2 2/4 Battery             Battery type Li-ion / Lead-acid Battery voltage range 40-60 V Max. charge / discharge power 3 kW 3.6 kW 4.6 kW 5 kW 6 kW 8 kW Max. charge / discharge current  70 A 80 A 105 A 112 A 135 A  190 A Communication CAN/RS485 Output AC (Grid side)             Rated output power 3 kW 3.6 kW 4.6 kW 5 kW 6 kW 8 kW Max. apparent output power 3 kVA 3.6 kVA 4.6 kVA 5 kVA 6 kVA 8 kVA Operation phase L/N/PE Rated grid voltage 220 V / 230 V Rated grid frequency 50 Hz / 60 Hz Rated grid output current 13.7 A / 13.1 A 16.4 A / 15.7 A 20.9 A / 20 A 22.8 A / 21.8 A 27.3 A / 26.1 A 36.4 A / 34.8 A Max. output current 13.7 A / 13.1 A 16.4 A / 15.7 A 20.9 A / 20 A 22.8 A / 21.8 A 27.3 A / 26.1 A 36.4 A / 34.8 A Power factor >0.99 (0.8 leading - 0.8 lagging) THDi <2% Input AC (Grid side)             Input voltage range 187-253 V Max. input current 21 A 25 A 29 A 32 A 40 A 50 A Frequency range 45-55 Hz / 55-65 Hz Output AC (Back-up)             Rated output power 3 kW 3.6 kW 4.6 kW 5 kW 6 kW 8 kW Max. apparent output power 2 times of rated power, 10 s Back-up switch time <4 ms Rated output voltage L/N/PE, 220 V / 230 V Rated frequency 50 Hz / 60 Hz Rated output current 13.7 A / 13.1 A 16.4 A / 15.7 A 20.9 A / 20 A 22.8 A / 21.8 A 27.3 A / 26.1 A 36.4 A / 34.8 A Max. AC Passthrough current 35 A 35 A 40 A 40 A 40 A 50 A THDv (@linear load)  <2% Efficiency             Max. efficiency 96.2% EU efficiency 96.1% BAT charged by PV/AC Max. efficiency 95.3%/93.9% BAT discharged to AC Max. efficiency 93.8% Protection   Ground fault monitoring Yes DC reverse-polarity protection Yes Integrated AFCI 2.0 Optional Protection class/Over voltage category I / II (PV and BAT), III (MAINS and BACKUP and GEN) General Data   Dimensions (W*H*D) 335*560*227 mm Weight 21.6 kg 22.2 kg Topology High frequency isolation (for battery) Operating ambient temperature range -40 ~ +60°C Ingress protection IP66 Cooling concept Natural convection Intelligent redundant fan-cooling Max. operation altitude 3000 m Grid connection standard NRS 097-2-1, IEC 62116, IEC 61727, IEC 60068, IEC 61683, EN 50530, MEA, PEA, NBR 16149, NBR 16150  Safety/EMC standard IEC/EN 62109-1/-2, EN 61000-6-2/-3 Features   DC connection MC4 plug (PV port) / Terminal Block (BAT port) AC connection Terminal Block Display LCD + Bluetooth + APP Communication RS485, CAN, Optional: Wi-Fi, GPRS, LAN