jmarrin, if the wiring to your powerlet is beefy enough, and the powerlet is rated high enough, and the location the powerlet is connected to can handle it (if it's not connected directly to the battery), then simply upgrading the fuse would work for an air compressor. Just know that if you use another device in the same powerlet that needs or wants a smaller fuse, in the event of a short to the device, it may suffer damage by having a heavier fuse. Not damage to your bike, but to the device.
This is why having a fuse block connected to the battery (switched or unswitched - your preference) is a better idea. You can plug low draw devices like a radar detector or GPS into a 3 amp fuse or lower, but your compressor into a 10 amp or 15 amp fused location.