Just tried the simulator, but if I input zero level pedaling, which would be using the throttle only, instead of calculating the motor assist level (20mph max), it assumes my mph is all of 4 km/hr. and it will take 7+ hrs to reach a destination that is 30km. The next level is pedaling without sweating (72 watts).
The specs I put in for an ebike were 350w geared hub motor / 36 voltage battery with 12aH, and 20mph top assisted speed (which converted is 32 km/hr).