Hi Garrett,
I have never heard of Sol-Ark either. This seems to be a US company focused on the US market. Looking at the inverter specifications it does sound impressive, but like any new product it’s wise to try and get some real world feedback. Some of the efficiency claims and the comparison chart seem a little dubious.
Based on the images and diagrams on the website, it appears to be well-engineered with quality isolation switches (circuit breakers) and solid terminals/connectors. Plus a builtin UPS isolator, a high 185A charge rating, and 2 x MPPT’s (although the MPPT voltage range isn’t huge).
It may well be great high quality, reliable, all-in-one unit. It would be great to get some feedback from people who have used them.