Hi, just joined the forum hoping for some advice from you knowledgeable chaps and chapeses
Ive converted 3 bikes over the last couple of years (two for my son, one for my mum), all 250w, one using the voilamart kit and two using the yose power kits. They're great fun, so I'm now looking to do the same for myself, but more of a custom job.
I purchased a cheap second hand MTB with disk brakes (160mm rotors) last weekend for £130, is basically new, so pretty pleased with it. Should be good enough for a "250w" build.
The advice I'm after is simply about the parts to use. I've had a browse on this forum over the last few days and have came across some good info.
I would like this to be a budget build, would love a battery from em3ev, but they are a bit more than I want to pay. But this looks more in my price range:
The above company seems to be recommended on here as good cheap batteries?
I'm wondering if there are any other UK companies in a similar price range anyone knows of?
(I'm looking for a 48v or 52v, but not sure if going for a 52v would cause problems sourcing a controller and LCD to suit?)
I keep hearing about KT controllers, do people mean KT Ketang such as these?:
As they seem to be out of stock everywhere, as presumably I would need one that is capable of 1000w peak power from the 250w motor to be safe, so for example, 15a x 48v = 720w. Would the controller have the option to adjust the amps that the motor can draw? So I can adjust the peak power? (This is a feature on the yose power LCD on my son's).
Do the throttles on the KT controllers have the ability to increase/decrease power based on the PAS setting you are in? And the option to use as just a normal throttle? (For off road use only obviously, as I'm aware we do live in a police state now)
Do the KT controllers have the ability to adjust the top speed, so it can be limited to 15.5mph, or allowed to go above when using off road? If so, what's the max? If they have a max?
There seem to be many controllers listed as "KT" controllers, are most of these knock offs, therefore I should only be looking for genuine KT Ketang ones?
(Edit- I guess actually, the above will relate to the LCD rather than the controller, was considering a UKC1 LCD display, would that be compatible with the KT controller?)
Then there's the motor! (I was thinking a motor that was ment to be 36v @ 15.5mph on a 48/52v battery, unless you just decide based on motor rpms?) I've seen many suggestions for a 250w, but a decent budget one that can handle as much torque as possible whilst still having a decently high rpm?, I know that's kinda like asking how long is a piece of string, but one that was capable of 30mph using a 48v battery and still have decent torque would be nice (again, off road only), and would the linked battery posted above be of large enough capacity to hold the voltage up enough to actually give decent performance? (As it's only 13ah). I presume so as the BMS can handle 40amps. (I'm guessing the power would drop off after not so long due to the low AH) Are these types of batteries capable of being discharged for example at 1.5 or even 2C?
Lots of questions I know, hence why I'm here asking!
Thanks very much guys
(Edit- again. After some more reading, I think I'm going to prefer the punchiness of a square wave controller, will need to be 30a for future proofing (assuming I can limit the amps with the LCD), I guess what I'm after is max torque/acceleration from a 250w motor. I tend to like running things to their limits, so may see how long the motor lasts at say 20 or so amps @ 48v for example - be nice if anyone has tried this personally?)
Ive converted 3 bikes over the last couple of years (two for my son, one for my mum), all 250w, one using the voilamart kit and two using the yose power kits. They're great fun, so I'm now looking to do the same for myself, but more of a custom job.
I purchased a cheap second hand MTB with disk brakes (160mm rotors) last weekend for £130, is basically new, so pretty pleased with it. Should be good enough for a "250w" build.
The advice I'm after is simply about the parts to use. I've had a browse on this forum over the last few days and have came across some good info.
I would like this to be a budget build, would love a battery from em3ev, but they are a bit more than I want to pay. But this looks more in my price range:
E-Bike Battery Samsung Electric Bike Battery 48V 13AH
18650 Samsung Li-Ion Cells 2600mAh High-Quality Electric Bike Battery. We provide outstanding performance and longevity to exceed expectations.
greenlance.co.uk
The above company seems to be recommended on here as good cheap batteries?
I'm wondering if there are any other UK companies in a similar price range anyone knows of?
(I'm looking for a 48v or 52v, but not sure if going for a 52v would cause problems sourcing a controller and LCD to suit?)
I keep hearing about KT controllers, do people mean KT Ketang such as these?:
As they seem to be out of stock everywhere, as presumably I would need one that is capable of 1000w peak power from the 250w motor to be safe, so for example, 15a x 48v = 720w. Would the controller have the option to adjust the amps that the motor can draw? So I can adjust the peak power? (This is a feature on the yose power LCD on my son's).
Do the throttles on the KT controllers have the ability to increase/decrease power based on the PAS setting you are in? And the option to use as just a normal throttle? (For off road use only obviously, as I'm aware we do live in a police state now)
Do the KT controllers have the ability to adjust the top speed, so it can be limited to 15.5mph, or allowed to go above when using off road? If so, what's the max? If they have a max?
There seem to be many controllers listed as "KT" controllers, are most of these knock offs, therefore I should only be looking for genuine KT Ketang ones?
(Edit- I guess actually, the above will relate to the LCD rather than the controller, was considering a UKC1 LCD display, would that be compatible with the KT controller?)
Then there's the motor! (I was thinking a motor that was ment to be 36v @ 15.5mph on a 48/52v battery, unless you just decide based on motor rpms?) I've seen many suggestions for a 250w, but a decent budget one that can handle as much torque as possible whilst still having a decently high rpm?, I know that's kinda like asking how long is a piece of string, but one that was capable of 30mph using a 48v battery and still have decent torque would be nice (again, off road only), and would the linked battery posted above be of large enough capacity to hold the voltage up enough to actually give decent performance? (As it's only 13ah). I presume so as the BMS can handle 40amps. (I'm guessing the power would drop off after not so long due to the low AH) Are these types of batteries capable of being discharged for example at 1.5 or even 2C?
Lots of questions I know, hence why I'm here asking!
Thanks very much guys
(Edit- again. After some more reading, I think I'm going to prefer the punchiness of a square wave controller, will need to be 30a for future proofing (assuming I can limit the amps with the LCD), I guess what I'm after is max torque/acceleration from a 250w motor. I tend to like running things to their limits, so may see how long the motor lasts at say 20 or so amps @ 48v for example - be nice if anyone has tried this personally?)
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