GoKawiilApple details power adapter requirements for wall-mounted HomeView
Apple published a support document specifying that the wall-mounted HomeView needs a separately purchased USB-C power adapter rated at least 20W with 9V/2.22A support, since it ships without a mount or adapter in the box. Apple warns that using an insufficient adapter can trigger a 'Not Enough Power' message, and some third-party mounts allow hardwiring to a home's electrical system instead.