Some of that info is in YT videos but if skimming 1500W is an ideal 12k answer. The 12k is spec'd to run all the way down to 190W (where it would be only at 3100 BTU, by the way)
Speaking 24K BTU unit now, Cooling mode, 25degree array angle (EG4 groundmount) due S location 38N on 2700W solar - clicks on at 8am CDT off at 7pm. The 24k unit runs all the way down to 300W. It has not shut off under partly cloudy conditions, it does slow under a cloud. Only 10-15 days of Cooling so far this year but the 24k is a monster. Peak high of 92F so far at my place and I haven't seen it over 1100W yet.
Also looks like you can overpanel the 12k?? 380Voc 10A max input? Cold cloudy dark place on HEAT mode? This is where I need you experts - please review spec and fact check me