First, did you have the refrigerator set to gas or on auto? It will default to electric when on auto. The converter changes 120v to 12-14 DC. It is used to charge the batteries. It is used only when 120v AC is available. There are several parasitic loads such as smoke detectors, LP detectors, CO2 detectors. Additionally the radio and television are not really off until they are unplugged. If the electric element was on the water heater, you would know it immediately as the generator would load up instantly. Anything that is plugged in and has a clock is a parasitic load.
The converter is placed just about anywhere there is room but often near the main breaker/fuse panel.
Finally, any kind of device with a remote control is a parasitic load as it has to how power to recognize the commands from the remote.
Steve & Trudy
Swamplands of Louisiana
Laissez les bons temps rouler!!!!