The GFCI in the bathroom should control the outlets around the sinks (kitchen and bathroom) and the outlets outside including possibly the outlet the refrigerator plugs into. Many times when you trip the GFCI you won't see a difference. It is possible the GFCI is defective. The is probably a breaker in the breaker box for the GFCI too. Check that. Don't just look at it, turn it off, wait about 10 seconds and then turn it back on. If you have an 80 amp converter there will be 3 30amp fuses on the end of it. These fuses (according to the manual) will only blow if the battery is hooked up wrong. Check them anyway. Also, basically all the converter does is provide 12 volts to charge the battery.