WZRELB Reliable 4000W Solar Power Inverter 12VDC to 120V AC Off Grid Pure Sine Wave Inverter LED Display 4000W continuous 8000W peak true pure sine wave solar power inverter, as good as grid power, power backup for home power supply. Transfer 12VDC to 120VAC, 60Hz frequency, dual US outlets. Intelligent temperature control cooling fan. Earth connection for both PCB board and output. Digital LED display. High quality true copper inductance, filter the wave form, ensure the true pure sine wave AC output, safeguard your equipment. All big imported mosfets with strong driving capacity. The PCB thickness is 2.00mm, allow the stronger current floating on the circuit, increase the load capacity. High frequency transformer to transfer DC to AC, ensure the stable and full AC output Free standard battery cables and spare fuse for replacement. DC input: 12V DC input range: 10V-15V No Load Current Draw: 1.5A Efficiency: 90% AC output: 120V AC Regulation: 3% Frequency: 60Hz Socket: 15A USA type Low Voltage Alarm: 9.5V-10.5V Low Voltage Shut Down: 9V-10V Over Load: shut off, recover manually Over Voltage Shut Down: 15.5V Over voltage protection: Shut Off Output Automatically Cooling Ways: Heat radiation sink and cooling Fan which will run automatically when the temperature is over 122F. Please use the standard battery cables we sent or the output may not be full. And the fuse are just spare parts for replacement, no need of replacing them at the first time. Please do not connect the inverter with the grid power, also a reverse connection of positive and negative is also forbidden. Please do not overload. If your applications are inductive loads, please choose the inverters whose continuous power is 3-7 times higher than the watts of your appliances. If you want to power up a refrigerator, we suggest you use 10 times higher power inverter. Please turn off the load first, then turn off the inverter. And as there is a soft start function, please turn on the inverter first, then turn on your loads or the output may not be stable at the first seconds. For a red light flashing, it is a kind of reminder to notify you that the input voltage is a bit high, you can regardless of it. 1*4000w inverter 4*10mm*2 battery cables Spare fuse, plastic terminal cover Manual Digital LED Displays show dc and ac voltage, let you know the condition of your inverter clearly. Terminal board as another choice for output connection, red with hot line, yellow with ground line, and black with neutral line. *The plastic cover is in the package. Input connection with battery cables, red with positive pole, and black with negative pole. AC ground connection design on the bottom, very safe in use.