After several smart 451EDs turned into “bricks” after a low-voltage battery failure went undetected for some period of time, I added a few more diagnostic error messages about the status of the low-voltage (12 Volt) battery.

From time to time, the code for the diagnostic box may be updated. You can get and apply these updates yourself for free. Here’s how…

Getting the box to work when it initially isn’t.

Your Macintosh needs certain software in order to use the ED-BMS box.

Your Windows PC needs certain software in order to use the ED-BMS box.

It all started for me with a Hackster post of this guy in Germany who created a device to interrogate the status of the main battery in his smart Electric Drive car.