RV parks are notorious for low voltage in the summer, when everyone is turning their AC on. Now that many RVs are running two A/C units on 50 amp service, it is worse if they are trying to use the same transformers. If you are frequenting certain campgrounds and RV parks, get to know where the transformers are located. Pick slots nearest the transformers so it's more likely you will end up with low line losses and less voltage sag.
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