Running dual compressors?

[Jayschevy]

I currently am running 1 compressor with a 5 gal tank on my truck and would like to add a second compressor. My question is if I add a 2nd compressor will I need to add anything else such as another battery or different alternator. My current alt I believe is a 55 or 60 amp alt and 1 compressor may pull up to 20 amps. Will my current alt be able to handle another compressor? What is everyone doing that have dual compressors?

Thanks