There are 2 requirements, 1: ampacity, 2: voltage drop.
2400 ac watts / .85 conversion factor / 12 volts low cutoff = 235.294117647 service amps.
235.294117647 service amps / .8 fuse headroom = 294.117647059 fault amps.
You want 2x 1/0 cable each with 250 amp fuse(preferably with high aic rating).
For voltage drop consult this calculator
https://baymarinesupply.com/calculator
Your batteries can only supply 100 amps continuous per battery.
You need at least 3 in parallel to service that inverter.
More information is needed to select wires and fuses for the rest of the system.
Are you following one of Will Prowse's blueprints per chance?