RoyB wrote:
I use the MV50 Tankless 12VDC air compressor (AMAZON) which is a very small footprint and airs up both my truck and trailer tires as needed. Our tankless air compressor comes in a handy carry case and fits under my rear seat in my truck. The tankless air compressor also being slow to bring up high pressures make for an excellent air compressor to do my blow out of water lines when freezing weather comes up in a hurry. The blow-method works great for us in our off-road camper when needed. Can winterize the whole system is 5 minutes or so and return back to normal use the next day by just refilling the fresh water tank.
I have a similar compressor that I carry in the Jeep. When we go off-roading, I air down the tires to 12 PSI. Then, when we get back to normal roads, I use that compressor to bring the tires back up to 33 PSI for road use. It takes about 10 minutes to do all four tires.
I don't find that burdensome.
Yes, I could carry an inverter and a 110VAC pancake compressor, but space is at a premium in a Jeep.
Any appliance that is designed with a lighter socket plug has to be low amperage (the socket is only rated for about 20 amps) and therefore low power. A direct-to-battery connection is often rated for a 30 amp fuse, and therefore has more power to get the job done.