I'm going to be adding two bedrooms and a bathroom to a pole shed I have on a remote property, and am looking to install a 3 zone mini split (27000BTU/22 Seer). I am considering getting the 3K growatt unit (120V). By my calculation mini split could draw 1227W (27000/22). The only other loads are somewhat trivial (Starlink, router, a few POE cameras, and lights). 3K seems like plenty, but I am not sure if I am missing anything? Is there any point in looking at 240V/split phase with this type of usage?