James, many uses the similar product from Hughes. They do so to overcome voltage sags or just plain low voltage.

I don't believe an autoformer will achieve your goals. Dumping the nuetral on the 240V input will balance the 240V load, but do nothing on the coach side 120V loads. It will certainly make the generator happier if you have a 240V generator like most. Some Vantares have 120V generators.

Unless you have inverters configured for 240V operation, this will not work.

Using shore power, you would be restricted to 240V power. No using 30A or less power through the autoformer.

The RVIA is a voluntary membership organization made of so called industry experts. I say so called experts, because their lack of expertise was evident when they wrote their recommendation to ban the use of autoformers in RVs. Just an FYI, you may have make sure it's not visible.