I completely forgot about that setting.Follow up... I saw the comments on the video about the fact that the solar generation limit appeared to be 8A instead of 80A and maybe it was an off-by-a-factor-of-10 problem and made it my mission to figure this out. I had planned to figure out a way to use the RS-485 bus to configure the settings, but before I got that far, I paged through the settings on the device and found an undocumented setting in the menu: 36. It was set to 5A on my unit. Range is 0-80. I set to 80A and now I am able to pull the full 1200W from my array in full sun! Hope this helps folks!
I haven't touched my unit in a few weeks now. Seems to be working.
My dilemma is that it doesn't appear this thing is UL listed and won't pass code...