I finally received the inverter I ordered a while ago, and have been using it for a couple if weeks so far. I've been looking for a decent one for ages, as all the other high-output ones I tried or read about so far have been sub-optimal.
I wrote a review about it. Feel free to ask any questions!
That was stupid: yeah, here's the Review link: http://gogreenit.net/index.php?page=morningstar-suresine sorry!
Over here, no experience with ModBus yet. One customer might want an application, but in my own house, they're all air gapped and I program them with buttons. :)