Bought a 22KW stand alone unit at Costco and heres what I've learned so far…
First electrician tried to tell me I have to move my gas meter and electric meter to the new construction distancing specs. I call the city and confirm that is not a requirement. The unit just needs to be a minimum 3' from the existing meters.
Being in the city, we will need to get the job permitted. Typically, you can get away with not permitting just about about any home improvement project and renovations but because we're dealing with the electrical supply that has a remotely connected/controlled meter, we're going to need to be in communication with the electrical supplier. If anyone has different knowledge than this, I'm all ears. Would prefer not getting the city involved.
Finally, the unit does nothing when sitting in the garage when the power goes out, haha!