put our Heads Together
Join Date: Jun 2003
Location: southeast pennsylvania
Bikes: a mountain bike with a cargo box on the back and aero bars on the front. an old well-worn dahon folding bike
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I expect E-bike setups that will work for you will cost at least $300. (But it looks like wheel size to match your bike is not available.) From there, you pay more to get more power, better range, lighter weight, more efficiency (meaning you get slightly more range or can pick a slightly smaller battery.) The cheapest you can go is going to get you a bike that is fine for power if you are riding on flat ground or if you pedal most of the time. Things start getting more expensive when you want to get more than 8 miles or so (no pedaling) of range or if you want a bike that's only a little heavier than a regular bike (doesn't matter that much really.)
The things you need are: motor, controller, throttle, battery, and charger. Typically anything that is described as an e-bike "kit" includes motor, controller, and throttle, and may include battery and charger.
By the way, the bike you own looks great, and I'm sure it will make a nice e-bike.
If you buy a hubmotor kit, be sure to pick one with the motor built in to a 700c wheel since that's what your bike is made for. FYI, most kits you will see for sale are hub kits.