Feature:1. Fully digital voltage and current double closed loop control, advanced SPWM technology, output pure sine wave.2. Has two output modes, including main bypass output and inverter output, and the MPPT technology enables high efficiency up to 99.9%.3. There are 4 charging modes, Only Solar, Utility Priority, PV Priority, Utility and Solar hybrid charging.4. A LCD screen and 3 LED indicators are designed to dynamically display system data and operating status.5. Manual ON and OFF switch can control AC output, and the power saving mode will reduce no load loss.6. Equipped with intelligent variable speed fan, allowing for effective heat dissipation and prolong system life.7. Can be connected to acid battery or lithium battery, which will be activated by photovoltaic solar energy or city electricity.8. Full protection, including short circuit protection, over voltage, under voltage protection, overload protection, reverse protection, etc.9. Photovoltaic modules(PV) can convert light energy into DC power, charge the battery through a solar inverter charger, or directly convert it into AC power to supply power to the load.10. Can be used as power supply or generator(utility), and access at the AC input can power the load and charge the battery. If there is no power supply or generator, the system can also operate normally, and the load is provided by battery and photovoltaic module.11. Can connect to various household and office loads, including AC loads such as refrigerator, lamp, TV, fan, and air conditioner.Specification:Item Type: Solar InverterMaterial: Cold Rolled SteelFunction: This inverter can also supply power for all electrical appliances in the home or office environment, including electrical appliances such as tube light, fan, refrigerator, and air conditioner, etc. AC Output Rated Power: 3500VA/3500WAC Output Voltage: 120Vac5%AC Output Rated Current: 29ABattery Input Voltage Range: 40-60VDCBattery Input Rated Voltage: 48VDCAC Input Rated Voltage: 90-140VACAC Input Frequency: 50Hz/60HzAC Input Maximum AC Bypass Current: 40AAC Input Maximum AC Charging Current: 40APhotovoltaic Input Maximum Power: 4400Wphotovoltaic Input Maximum Open Circuit Voltage: 145VPhotovoltaic Input MPPT Input Voltage Range: 60-115VDCPhotovoltaic Input Maximum Input Current: 50APhotovoltaic Output Maximum Power: 4200WPhotovoltaic Output Maximum Charging Current: 80AModelHF4835U80-145Rated Input Voltage110/120V ACInput Voltage Range(90V AC-140V AC) 2%Frequency50Hz/60Hz (auto detect)Frequency Range470.3Hz~550.3Hz (50Hz)57+0.3Hz ~650.3Hz (60Hz)Overload and Short Circuit ProtectionCircuit BreakerEfficiency>95%Conversion Time (Bypass and Reverse)10msReverse Flow ProtectionYesMaximum Bypass Current Load40AInverter ModeWaveformPure Sine WaveRated Output (VA)3500Rated Output (W)3500Power Factor1Output AC Voltage120V ACUnstable Input Error5%Output Frequency (Hz)50Hz 0.3Hz, 60Hz0.3HzEfficiency>91%Overload Protection(102% <load<110%) 10%: Turn off the output after 5 minutes;(110%<load<125%)10%: Turn off the output after 10 seconds;(125%<load)10%: Turn off the output after 5 seconds.Peak Power6000VAMotor Capability2HPOutput Short Circuit ProtectionBreakerBypass Breaker Specifications40ARated Battery Voltage48V (minimum start up voltage 44V)Battery Voltage Range40.0Vdc-60Vdc 0.6VdcPower Saving Mode Self Consumption50WNo Load Self Consumption48WUtility and Grid ChargingBattery TypeAcid Battery or Lithium BatteryMaximum Charging Current (AC)40AUnstable Condition Error5AdcCharging Voltage Range40-60VdcShort Circuit ProtectionCircuit Breaker and FuseCircuit Breaker Specifications40AOvercharge ProtectionYes. Automatic reminder, turn off charging after 1 minute.Solar (PV) ChargingRecommended PV Maximum145Vdc (150 VDC Actual)PV Operating Voltage60-145VdcMPPT Voltage Range60-115VdcBattery Charging Range40-60VdcMaximum Input Power4400WMaximum Input Current80AMaximum Output Power4200WPV Charging Current Range0-80AShort Circuit ProtectionInternal FuseWiring ProtectionReverse PolarityParameterOperating Temperature-10 ~ 55Storage Temperature-25 ~ 60Humidity5% to 95% (Three Layer Paint Protection)Noise60dBCoolingFanSafety ClassIP20Sizes (L x W x D)(Approx.)426 x 322 x 124mm / 16.8 x 12.7 x 4.9in.Package List:1 x Solar Inverter2 x Terminal4 x Screw1 x Wiring Diagram1 x User ManualNote:1. Installation and wiring must comply with local and national electrical codes (NEC) and must be completed by registered technicians.2. Do not disassemble or try to repair the inverter.3. This inverter has no repairable parts. 4. Do not connect this unit in parallel with other AC input sources to avoid damage. When the machine is running, the temperature will be very high, do not try to touch the machine. 5. Make sure that all connections to and from the inverter are tight.6. There may be sparks when connecting, so make sure that there is no combustible material or gas near the installation. 7. It is recommended to install a circuit breaker or fu