[tdy721]

Many construction vehicles use hydraulic motivation. The Diesel engine is only there to pressurize the hydraulic system. There’s no reason you can’t use an electric motor to motivate (The pumps inside) those vehicles, they don’t directly use the diesel output as they are built today.

[giantrobot]

You can use an electric motor to run the hydraulics but batteries are a poor way to power those motors. A diesel generator has far better energy density for a given volume. So I'm saying a diesel hybrid power train is better suited for construction vehicles than a straight battery electric.