All our power stations can be used as Uninterruptible Power Supply (UPS), but it depends on the charging and discharging status. When the output power is less than the input power, it's absolutely a UPS, but if the output power exceeds the input power, then it will also draw the power from the PowerHouse.

• Uninterruptible Power Supply (UPS): To use the UPS function, connect Power Station to the wall outlet with the AC charging cable, press the button, and connect your devices via the AC output ports.

For power station model 511/521/531/533/534/535/545/555, the mains power can be automatically switched to the battery power and there is no transfer time. 

For power station model 757 and 767, the mains power can be automatically switched to the battery power and the transfer time is around 20ms (millisecond). 

If you have any other questions, don't hesitate to contact us for help.