Thanks to Gelmjw, CuriousCarbon, DoggyDogWorld, Supervstech, 12VoltInstalls, and StuartV.
I'll be purchasing the Growatts this week, and I plan on following up with how everything is working out.
Last question for anyone willing to answer: I am pulling 415-450 (max) from my 4 x 240 (37.2A)...