I found the wording in this paragraph awkward.
"The main reason is, that when you get into high power designs, the size of things really matters. The batteries I’m using have a maximum discharge current, that is fuse and breaker limited to 200 amps at 48 volts, that’s equivalent to 800 amps at 12 volts. The size of wires, circuit breakers, fuses, and other components becomes prohibitive at these power levels."
You may want to make clear that the equivalency is 800 A @ 12 V is the same 9.6 kW of power as 200 A @ 48 V delivered to the inverter. Your point is that by designing around a higher voltage you can take advantage of the lower current when sizing components. You're not saying a fuse or breaker interrupt current is a function of voltage, e.g. a fuse sized for 800 A on a 12 V circuit doesn't open at 200 A at 48 V, it still opens at 800 A.