[jatgm1]

Is this doable? Like three battery packs with separate bms units that are all 72v battery packs with a bunch of 18650 cells in a box in the back of my Nissan, run the power connection for the battery and vehicle input and everything here and use a Arduino to turn on and off 360v relays or whatever so I can use only one at a time and switch off? Or I guess run parallel but I'm not too sure If that would be a good idea. Also need to figure out how to disable Regen braking because i have no idea if that'll be a good idea with the series of 5 packs.

 

[brian_]

Also need to figure out how to disable Regen braking because i have no idea if that'll be a good idea with the series of 5 packs.

Why do you think that the grouping of the cells into a few (3, 5, whatever) bunches in series would matter to regeneration?

 

[jatgm1]

Because two cells on other packs were a different voltage, they are on two separate bms units, and won't balance with one another. Don't know if that's a problem.

 

[remy_martian]

You can't "disconnect" regen - it comes for free as part of the inverter toplogy.

Do your first run on the 4th of July and impress your neighbors with the 18650 bottle rockets.