your 5500 watt Generator is capable of delivering 45 amps of power at 120 volts simple rule is :
Watts Divided by volts = amps.
most likely the spec'ed 5500 watt rating is surge wattage. constant duty will be closer to 4500 watts. Either way you generator will do more than enough to run the "Fry Daddy" it only draws 10-12 amps. That amperage is based on my personal "Fry daddy"
Now having said that, you can goto wally world and buy a propane powered rig that comes with the a burner, stand, pot, strainer and usually a thermometer and matbe some cutting knives for about $40. all you'll need then is a grill sized propane tank, oil and the Fish!
I use mine to melt lead(different pot), deep fry fish and to deep fry turkey's (huge pot).
Basic burner setup
This is melting lead.
sorry no pic of me cooking anything
HTH,
Jason