eBike technology explained

Hey everyone!

I've been seriously considering a cargo eBike lately, especially with gas prices and wanting to do more local errands without the car. I'm looking at models like the RadWagon or Tern GSD, and while I get the basic idea of pedal assist and throttle, I'm curious about the specific tech that makes cargo eBikes excel. What are the key differences in motor types, battery capacity, or even frame design tech that really set cargo eBikes apart for hauling heavy loads over, say, a hilly 10-mile round trip? Any insights on what to look for under the hood would be awesome!