They are not UL Listed, but they are UL Compliant. Big difference, but still very good.According to the email I got from Ian at Watts247, those LV6548s that you have are the only UL listed ones they carry. Have they been pretty solid for you? What is your setup? Do you have a diagram, or can you just explain?
Very basic explanation, I have 2x wire for split phase in my RV that I live in Full Time. The outputs are wired directly to my power distribution panel, and I have it set to run on Solar/Battery as first priority, amd when the battery gets to 10%, it will automatically switch over to the Grid until the battery is back up to 20%. Check my sig for "The Meg Build", where there is a very in depth install and setup of it all.