Ooooo Fred...
You had or have the marine model 1512. When Xantex lobotomized Trace they brought their own line of Chinese developed chew & spit control circuits. I've tried running down Sanscrit marked components to no avail on Xantrex stuff. Four inverters same wattage 10 years. Every circuit was different. Would love to know function of HSOSANI 8083 SMD 12 legs. The board I have here has the legs blown off one side. Looks like a 5+ control circuit. These junk designs are meant for exchanging under warranty or recycling outside of warranty. Go figure.