Its marekting hype, depending on who's spouting the terms.
Some sellers will sell a 35h width motor, commonly spouted as 1500w and state that its really a 250w motor to snag extra income from UK and AUS sales which have a legal limit is 250w.
Other sellers will be more accurate and honest in their sales pitch and give you a range of power.
If the kit is being sold as a kit, perhaps the discharge amps of the controller is multiplied by the voltage they are using and they give that # for their wattage rating. But they could be using a 5000w mxus 45h motor, for your 250w uk kit, how would you know any better if you really didnt know. Also, it can give the illusion that the seller has more unique product then they really do, only having to stock one motor like a Leaf 1500w 35h, for their entire lineup.
Thats part of the reason why they COULD be so ambigious, along with the communication factor. But I see it like a used car salesman stating little needed info on the ad, to get you to take action, then they skip into action selling stuff.
Whatever the power or power range is, you could go 1v 1200a for 1200w or 12v x 100a for 1200w, which is all the same power as a 48v 25a 1200w.
36v and 48v and 52v are just easy things to deal with rather then huge, massive, welding gauge wires for 1v 1200a.
For that matter cost of a 1v 1200a controller would be sky high.
Same goes for high voltage controllers, over 100v gets $$$$ - because perhaps 100v caps is the limiting factor, or design.... not my cup of tea so I dont know why. The sweet spot is 36v/48/52/72 volts for the wires and componentry (caps, fets and so on), if you wanted more speed then go 72v, if you want more power then up amps or up volts to 72v.
Voltage = Speed
Amps = Torque
Wheel size = either higher speed with lower torque (larger wheel 29"/700) or slower speed with some extra torque (smaller wheel, 20" bmx diameter) - Dont forget you cant go too small, have to lace hub to rim with spokes. There might be a special term for the wheel torque, perhaps effective torque or something. Just like a wrench, grab a bar = more torque to undo the bolt or nut.
Increasing torque will get you up that hill faster.
Less torque means you get up that hill slower, heating up the motor more and perhaps requiring you to pedal more or not.
It all depends on what you want, this is why there are motor simulators and trip simulators to play with
Can be a bit tricky to decode and understand each pull down menu and how one affects the other. Like the same hub, different motor winding debate that roared on and on and on.
https://ebikes.ca/tools.html
pmmali said:
I still don't know these details, even if I ask someone, they won't tell me
what is the difference between 1000watts and 2000Watts motors? if the motor watts are higher, than the bike can hold more weight or it can ride long?
What is the advantage of increasing the voltage of the motor?
because some Electric bike motors are 48V, and some are 60V, some motors are 72 0r 86 Volts
What are the benefits of increasing the voltage and watts of the motor?
