While battery size may vary per model, you can generally expect 30-50 miles per charge on an EVELO model! The distance you achieve depends on your Pedal Assist level, as well as Throttle usage.
Take a look at the following video about how you can get the best range out of any eBike battery: https://www.evelo.com/blog/how-do-i-increase-the-range-of-my-electric-bikes-battery/