As a follow up. After crawling the boat with a surveyor, we are even more puzzled by this. The inverter, smart shunt, kisae 1250, ACR, dvsr, posts, wiring, etc all appear to be identical to the "Dakota" circuitry for an LE model. The batteries are the only " one of these things is not like the others". Only one small sticker, indicating made in China, model smt-lfp12v150A,not recognizable certifications or other labels. Did a search could only find one that looked similar, also made in China, called and it's not theirs, because they put a big label on the side. Oddly enough, they were emitting a Bluetooth signal, but no idea what app to use to interpret that signal.
More as this develops. Wonder how many of these are out there.