Originally Posted by Skyliner
For 50 PSI tires, the 3 gallon 1/3 HP 100 PSI pancake air compressor at harbor freight is on sale for $39 right now with coupon. It runs on 120 VAC which isn't a problem if you have a generator or in my case, solar, inverter, and almost 700 amps of battery capacity. It used about 400 watts which isn't much.
What Skyliner said.
For airing up tires and using to blow out the plumbing during winterizing, you can't beat it for $39.
If you are wanting to do more H/D stuff and much higher pressures, look elsewhere.