312QBUD with resi fridge. Question about inverter

your looking at this backwards by looking at the fridge outlet. first find the inverter and see how the output of it is wired to the fridge outlet then you would need some way to switch in the other outlets like a transfer switch or add new dedicated outlets for the inverter. but you may be out of luck trying to use that inverter for much more than charging cellphones as the start up wattage of your fridge may be close to the output capacity of that inverter already.