Class t is required for 24 and 48 volt systems but not 12 volt LFP systems.
2000 ac watts / .85 conversion factor / 12 volts low cutoff = 196.078431373 inverter amps
196.078431373 inverter amps / .8 fuse headroom = 245.098039216 fuse amps.
An 250 amp MRBF fuse.
Victron has suggests a bunch of different wiring methods.
I suggest you use aggregate all the batteries and the inverter/charge to the same busbar.
Fuse each battery at the positive terminal with an 150 amp MRBF fuse and use 4 awg pure copper wire.
Fuse the inverter/charger at the busbar witha 250 amp mega fuse.
Connect batteries to the Lynx DC distribution system with the Lynx Power In, a modular DC busbar. Find a dealer nearby.
www.victronenergy.com
Use this video to find out how to fuse the inverter/charger branch circuit
Will you have any other components in your system?
For instance solar charge controller or secondary dc distribution?