What kind of tech stack did you use? I work on EV and EV-adjacent at $dayjob, I am very familiar with all of the concepts in your initial post.
Also, where did you get your battery(ies)?
Also, where did you get your battery(ies)?
Stack was leaf batteries, motor & inverter with our own gearbox modification (swapped direction), inverter with Openinverter.org Tesla model S A/C charger, Tesla DC/DC and then my own STM32 based control unit orchestrating all that.
Send me an email please, if you work in or with big auto I want to show you more of the app and get your opinion!