I honestly don't know why someone hasn't done a diesel-electric[1] truck yet with a moderate size battery.

You'd have more torque than is possible, could ditch the transmission/transfer case/etc and it would allow you to build out a platform to understand the motor/electrification side of things with reasonable energy density until the battery curve catches up with high duty cycle usage.

I mean locomotives moved to that powertrain decades ago(which is why the VFDs in current EVs are so fantastic) so it seems like a reasonable way to approach things.

[1] https://en.wikipedia.org/wiki/Diesel%E2%80%93electric_transm...