About us: Professional manufacturer of pure sine wave inverter for 8 years. Original factory, provide the reasonable price and high quality and fast response to your questions within 24 hours. Product details: DC input: 48V DC input range: 42V-60V No Load Current Draw: 2A Efficiency: 85%-90% AC output: 120V AC Regulation: 3% Frequency: 60Hz Socket: 15a USA type Low Voltage Alarm: 43V-45V Low Voltage Shut Down: 41V-43V Over Load: shut off, recover manually Over Voltage Shut Down: 61V Over Thermal: Shut Off Output Automatically, Over voltage protection Cooling Ways: Cooling Fan will run when the temperature is over 50 degree Precautions: 1. Please use the standard battery cables we sent, or a full power output may not be . And the fuse are just spare parts. 2. Please do not connect the inverter with the grid power, and a reverse connection of positive and negative is also forbidden. 3. 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. 4. 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 stable at the first seconds. 5. For a red light flashing, it is a kind reminder to note you the input voltage is a bit high, you can regardless of it. If the input is too high, the inverter will shut down automaticly. 6. The output voltage can be adjusted in a little range. 7. The inverter have no auto restart function, if it is stopped because of your battery is out of power, you need to restart it by hand after fully charged your battery.