When the inverter shuts off once it being in protection, it is not necessary to press the switch (on/off), just moving the high loads, the inverter can restart automatically. So there is no need to place the spare fuse.

This product is built with UPS auto conversion: when the main power is shut off,the unit can be changed automatically to supply the power by inverter ,but after the main power resume ,the inverter stop work automatically ,and get into the state chargin for battery.