Well, you can get some decent speed and range @36V 360W with gear help.
Micargi 3-speed Rover with SBP electric kit, but a wimpy 36V 'bottle' battery.
Good for ~20 miles at ~22mph with no pedal help.
The motor and controller can take huge voltage and current, but will run even small power just fine.
My point is don't limit yourself to pressing the limits of your motor and controller as you never want to worry about adding more battery power like this example.
I had a big square 48V LI battery on hand slated for trike, but I shoved in this bike with same motor/controller in the above SBP e-bike parts 3-speed.
Electra 7-speed bike.
53V LI battery.
1680W 48V motor.
Programmable controller.
0~40 mph in ~10 seconds.
~40 mile range between charges.
It was too funny when the customer, a kid, took delivery.
Though he was warned to take it easy off the line he didn't get 10' before for flipping off the back from a wheelie.
He was geared up and didn't get hurt, but it was sure a wake-up call to him about how much instant power there was.