UL 1449 Certified Surge Protection Devices for RVs

[avanti]

Does the Outback allow the full 30 amps of AC through, or limit to the rating of the inverter at 2800W?

The Outback VFX2812 lists a max AC input current of 60A and a max output current of 40A so, yes, it will pass the full 30 amps.

Does it do it with a transfer switch in the unit, or run it as AC in, convert to 12, invert to AC out with the inverter?

It has an internal transfer switch. It also automatically handles neutral/ground bonding. I still need an external transfer switch for the genset (upstream of the Outback), but stock GWV had two transfer switches--the Outback eliminates one of them.

More going on with all this, that I didn't realize, with one unit doing it all.

Yes. The all-in-one units are expensive, but they at least save the cost of a bunch of the little bits, and they are much easier to understand and operate.