No. Nobody is putting in a 12v to 400v dc to dc converter. There would be no point. I haven’t done the math but I’d be surprised if you got more than a couple m

No. Nobody is putting in a 12v to 400v dc to dc converter. There would be no point. I haven’t done the math but I’d be surprised if you got more than a couple miles out of it. If your high voltage battery is completely dead, you’re calling a tow truck.