I see many wiring diagrams (e.g. explorist.life) that show 4/0 cable to the inverter when upgrading from a 2000W inverter to a 3000W inverter. 2/0 I believe can handle up to 400amps. Is 4/0 really necessary? The reason I ask is I will be temporarily using a 2000W inverter that will not be wired in to the panel and 2000W and 2/0 is overkill even for that. But the long-term plan is to wire in a 3000W inverter to the panel. Even then, I don't see myself running the AC units on the battery when boondocking. My BattleBorn GC3 270Ah battery is rated for 300amps. Just trying to figure out what would be drawing all these amps that would require 4/0 cable.