Power Protection Device, Do you?

An autoformer is not a voltage regulator, per se. It's a buck-boost transformer that may or may not offer built-in automatic adjustment of the ratio between its primary and secondary windings. As I understand it, some autoformers for RV use may also include other campground power protections built-in in addition to boosting campsite pedestal AC voltage for use in the RV.

Here's what is really going on inside an autoformer and why it may not be nice to your camping neighbors to use one if you don't know what you and it are doing:

http://www.beamalarm.com/Documents/autoformer_usage.html