First, does the
refrigerator even need and
inverter to run or is it an AC/DC
refrigerator that runs on
shore power if available and 12 volts DC if not? Personally, I think this is a better solution for most of us rather than some sort of "home" or "dorm" refrigerator for better efficiency.
Get out the
But really, your entire question cannot be answered without a lot more information. Information such as the
current draw of the
appliances including any startup or surge
current, the maximum and continuous
power capability of the inverter and the capacity of the
batteries in Amp Hours.
You certainly need to run the genset (or
plug into shorepower) to operate an air conditioner, range and/or
oven. You may or may not be able to run a microwave over on inverter/battery power. It can be done on my
boat but I planned and sized my
equipment for this operation.