I just got my evo street bike a few days ago. I tried going up 2 different hill and I was unable to get up either one of them. The first hill I was in pedal assist, in a very low gear and could not get up it, my guess the grade is about 20 degree incline or more. Yes, I am out of shape, but still. The second hill, I tried throttle. The hill was not as steep, but very long. It really struggled and made it up about 3/4 of the way. Each time, it used up about 5% of the battery.
Also, I noticed that the bike seems kind of jerky. If I am in pedal assist the motor goes on and off. I tried an e- bike in Vancouver at a rental shop. The bike felt very different. It could be that it was a cadence sensor. If so, that was great going up hills in petal assist.