How Many Amps Can A Car Alternator Produce. Car batteries range from 40AH to 110AH and alternators range from 45 amps to 200 amps. This can power an inverter that will deliver about 1200 watts 120 VAC.

THE IMA MOTOR IS ALSO USED AS A HIGH VOLTAGE ALTERNATOR THAT CHARGES THE IMA BATTERY. The DC-DC converter wont be able to keep up with even a 1 kW drain headlights AC and your ear blasting amplifier. 144 volts x 60 amps 864 watts.
Add for MSD or similar ignition system.
Read everything about it here. The output of the alternator ranges from 40 Amp up to 120 Amp. A low-amp alternator will typically have an output range between about 50 and 100 amps. For high-amp alternator it can generate up to 300 Amp.

