Automatic Transfer Switch PDU in The Homelab - Does it make sense?

Interesting. I have a whole house Generac too x 2. I don't have a fancy set up like yours tho although mine came with the switching mechinism. Mine are the G0072910 model, and tho I am not one for putting wi-fi on any and everything willy nilly, but I would have to say it is handy. Also the wi-fi on the Traeger is very nice too. Out where I am is mostly farming and we are some of the last people to get power restored. Thankfully, this state has a real good track record for keeping the power on.

I have one, and I love it. It bridges my large UPS and the mains power, so that if either one of those fail, then things keep running. I have it on mains in case something kicks up too high and overloads the UPS.