“Second, even if you do make bikes in the US, they will be multiple times more expensive than their overseas counterparts and 99.9% of consumers won’t pay that price. When my shop tried selling a US-made bike next to a Chinese bike, with signage that explained why the US-made bike was more expensive, we couldn’t even sell one. Customers would stand there and talk about how they want American-made goods, then they would buy the Chinese bike.”
E-bikes mostly use motors and battery options from a few major suppliers: Bosch, Yamaha, Shimano, and Brose. A few other brands exist, but are less reliable or powerful. Some, like the Yamaha system, have more torque and others are quieter. But generally all four make good options. Look for motor output (in watts) which will give you an idea of total power. But watt hours (Wh) is perhaps a better figure to use—it takes into account battery output and life to give a truer reflection of power.