Here is a Link to the owners manual.
http://wfcoelectronics.com/wp-conten...Manual_web.pdf
There is an on/off button on the inverter and, it is often equiped with a remote on/off switch (as per the manual).
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"..Remote Switch Panel
The WF-5110R Inverter has a remote switch panel that provides status information and ON/
OFF control of the unit from a remote location.
The WF-5110R Inverter remote replaces the ON/OFF Power Pushbutton located on the front
panel of the main unit. It can be mounted up to 20’ away using the supplied cable. In addition
to the centrally located pushbutton, the remote panel features a Green power status LED.
NOTE: the ON/OFF power switch on the inverter’s front panel must be in the OFF or OUT
position for the remote switch to function. "
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