derestrict speed

I'm considering purchase a Batribike Alpha for a 16 mile commute that I need to complete in no more than an hour. It seems like a good bike for this purchase, with a pannier rack , mug guards and lights built in. My own real concern is that the 15 MPH limit is too low to make the journey...

Can anyone help? I have a Hailong-3 48V 11.6Ah connected to a KT-lcd3 display and 1000w motor no controller, throttle only. Using the menus I am unable to change the max speed from 16kmh. Is there a way to overcome this?