Thanks again. I do see the advantages ("KISS"
, but have to ask the question: are true professional installs fed off a bunch of wallwarts? It just seems less elegant to me to have it all setup that way. I'll end up needing 2 or 3 wallwarts once Im done and its not even what I would call an advanced setup.
Depends, and frankly, it also comes down to the AHJ and municipality. In my state, technically anyone that holds a limited low voltage license can't do any work involving anything higher than 25V, 5A. Some AHJ's mandate a hardwired transformer on any install that has a fire alarm involved, even in a straight residential combo install. Also, I have friends that are contractors in other states, and as an example, they are allowed to to all their HV interconnects up to an existing electrician installed breaker or circuit.
The reality is, as pointed out, most typical installs will have, at best, a second power supply, which if 120V is needed, most guys will simply install a 3 wire "whip" and plug it to the nearest outlet, with the OEM transformer for the panel plugged in wherever convenient. I doubt that most HO's would like to pay the cost for a system and then a secondary cost for an electrician to wire in a new branch circuit..then find out they need a panel swap or a subpanel....
In an ideal world, I'd love to see all the hardware, panels, supplies, and like, all have 120V hardwired connections and a service switch inside to disconnect AC and batteries (for many reasons) but I doubt I'll ever see it.