From the information I've goitten on this forum and others over the years, refrigerator repair is really not that complicated. Almost any appliance repair service can repair it. The parts are available for almost every repair. The most common problem is loss of coolant. Repair entaisl two or three steps. First, charging/reading valves have to be installed; they're similar to the ones on your car, but refrigerators and portable air conditioners don't come with them. That's a rather simple and inexpensive step. Next, "freon" has to be added and the leak found and fixed. Associated with that step and actually the third step if you have an older unit might be to replace the freon that's in the unit simply because the freon used in older units is banned by law and isn't available. If you are having an electrical problem, the key problem parts are the relay which switches the unit from AC to DC power snd the compressor. Replacing either part is cheaper than replacing a refrigerator. By the way, the units always use AC power. The relay just switches on a built-in inverter which converts DC to AC when underway. Inverters sometimes burn out, which would lwave the refrigerator working on shore power or generator, but not on battery power. So, contact your local appliance repairman for help. Hope this hels. Hy