The GM branded air pump that’s sold as an expensive accessory is a rebranded version of this one on Amazon for half the price.
It conveniently nestles in the foam block under the trunk floor.
You can absolutely plug in to a normal outlet; the EUV comes with a level 1/2 charger - you just change the pigtail depending on what you're hooking up to. I just got my Qmerit installation today, and I was charged off L1 for the past several weeks, though I don't drive daily!
I personally purchased several accessories, most on Amazon - here's what I got:
I'm loving how quiet and quick my EUV is - so I hope you enjoy yours, too!