https://www.badgermagnetics.com/case-studies/autotransformer-vs-isolation-transformer-isolation-transformer-vs-autotransformer/Don,
The following can be of great assistance in learning the difference between auto and isolation transformers.
Down here, its absurd to consider an auto disconnect circuit protector as it means total electrical disconnection more than half the time in rural areas.
Direct distribution lightning protection is the most challenging circuits to create. It means separating incoming power from the load by at least 8 inches of air while offering enticing Corona corona discharge path(s). I know of no lower voltage device that will not burn to a cinder if incoming voltage takes a direct strike.
Does any RV insurance company offer underwriting protection against damage to RV accessories?