A friend of ours owns an island in Canada on Lake of the Woods. When his parents bought the island in 1961, they put in a Servil gas refrigerator. The parents are gone now, but my friend has their refrigerator in his cabin. He is there June - August. He said the Servil propane refrigerator has never failed, not once since 1961. He starts it up when they get there in June and it runs till he shuts it off in August. He lives totally off the grid with some solar panels to provide for their few lights and computers. But I don't think the refrigerator needs any.
DAle