Eco Wise 50/1 whole house voltage regulator. Primarily used to protect office floors of computers in Mexico, (just catching on) and for use with solar. Bought it of the shelf in Home Depot, Mazatlan. About 700 dollars cdn.
I have not read where "buck and boost" is available in all models however my power remained at 122 volts, both legs for 5 months. During this time the power (known from other campers) was all over the board, usually over 132, but dropped significantly during peak use of electricity in the area as well as the campground.
A design feature of these units is to take only and exactly the power requirement demanded every split second resulting in cooler transmission and sending unwanted power down the line which according to the inventors in Florida saves about 20% in power usage.
Unfortunately those in the park with progressive and other brands have had to put them away for the duration of their stay or be inconvenienced with the power shutting down 10 times a day.
They also have a 30 amp model. If you look up under "buck and boost" electricity you may find another manufacturer in California.
(now I require a simple (sacrifice) surge protector to protect the voltage regulator)
