Thanks for the reply, but that's not the issue. The AC will start and run for a few seconds, so it's getting past the startup load. It's that it won't keep running because the battery voltage drops so low -- even though 430 amp hours should be (in my opinion) plenty sufficient to run the A/C for awhile -- even longer with 40 amps of solar dumping into the batteries at the same time.
Are you sure it's starting? A lot of air/con units will start the fan then a few seconds later, start the compressor. Most of the noise you hear is the fan and it's hard to hear the compressor kick on. That would align with it overloading a few seconds after it starts.
Alternatively, did you actually measure the amp draw? If it's actually drawing 12-14amp, that might be stressing the inverter. 2000w rating may be the peak, not continuous rating. Exceeding the continuous rating often has a slow breaker that takes a few seconds before it goes.
