CCA is the cold cranking amps, and that is what the winch draws if your engine is not running. When the engine is running the alternator is charging the battery, so there are 2 ways to get around the amp draw of a winch.
1. What output alternator like around 140-160 amps, about $300. Stock alternator on XJ, YJ, and TJs are 90 amps
2. What outpur battery around 800-1000 CCA, about $90-220