I am an average recreational cyclist and I usually only average about 100-125 watts of power on my traditional bike. Before you laugh, remember that I am a septuagenarian. And of course, that’s my average so there are times when I pound the pedals and produce more power.
The thing to keep in mind on an e-bike is that it is “pedal assist”. So the total power output is the combined power of the rider and the motor. In my case, my Class 1 – 350 watt e-bike and my 100-125 watts produce more than enough power to meet my day to day cycling need. In fact, it feels like I’m riding on a tandem with a pro cyclist.
Think about it, a well trained pro cyclist can produce about 400 watts of mechanical power for sustained periods and up to 1000 watts for short efforts like a sprint to the finish line (see Harnessing The Power Of The Peloton In The Tour De France -forbes.com). So, it only stands to reason for normal day to day riding on an e-bike you would not need more power than a pro cyclist.
So why are some e-bike vendors pushing large motors? Honestly, I don’t know. My guess is to help their product stand out among the competition with an uninformed buyer like I was when I purchased my first e-bike. Don’t be seduced by an overpowered e-bike. They are more expensive, heavier and consume more energy.