For very low power scooter motors the 30A "could" do the job. But then we're talking 10kg units with 250W of motorpower.
Those will move a heavy at a snails pace.

Botbitz TZ85 can do bigger motors, but I wouldn't go over 24V 600W. What is barely useable for a brick that moves at leisurly pedestrian speed.

To give you an idea. Most heavies use 36V 80A or more. And that is with esc's that have peak ratings of 120A+.