Thanks to the fine folks at KTA-EV, I have a new Elithion main board. I still need to add some more EMI shielding (for the faults that occur during regen), but for the most part, it is working well.
Now I need to figure out why the GFCI is tripping when charging. (Hint: probably had to do something with switching the house over to the underground power). Will keep you posted.