According to that calculator, 1.2v drop with 24v using cu 1/0 AWG and 50 amps would be 120 feet round trip!
The 24v inverter alarms at 22.4 and a 12v inverter alarms at about half that say 11.2 (11 for mine) so at 24v 50% SOC you have that 1.6v window. With the 12v you have a 0.8v window.
So it is true that "good enough" for still being able to make toast at 50% SOC is equivalent at 1.2 vs 0.6, but that does not "excuse" the 1.2, which should be 0.3
I am very confused.
EDIT--What is the point of going 24v battery bank and 24v inverter then, since the battery bank has so much more R and you use the same wire? If you used thinner wire, which is the supposed advantage of going 24v, you would be worse off.