Another consideration:
I have Milwaukee tools and bought a Milwaukee battery powered compressor. I believe DeWalt, Mikita and others have their own. It's small enough that it fits under my rear seat along with all my other essential crap.
It doesn't have a huge capacity, but enough to fill a full sized tire, or I recently used it to top off 4 trailer tires. The portability is nice.
In regards to the 400watt outlet. with my Milwaukee chargers, I have to watch which charger I use. A combo 18V/12V rapid charger draws too much and trips the outlet. A combo 18V/12V standard charger runs without an issue. I also have a dual 12V/110V Milwaukee charger that works.