Evening all, I've got a Synch super monkey with a 250w Bafang hub motor. I was reading earlier that I don't necessarily need to get a bigger motor to get more power out of it. The battery is a Hailong 36v 13aH unit. I've looked online and I can get a 48v 18aH battery for around £200 on Amazon, what controller would I need and would just plugging the controller in automatically give me a power boost or would I need to fiddle with electrics to unleash the power? Would I also need to change the display or do anything to it? Thanks in advance.
Hub motor power upgrade
- Thread starter AlexGrant88
- Start date
It was restricted but I managed to take the restriction off. It does 23 or 24mph with the wheel in the air.
Sorry about the late reply, I've had to wait to get my allen keys back from a friend. I've taken a picture of the label and also the insides.
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That unit looks to be epexy filled, makes it a pain to do a shunt mod.
If it's 250w @36v, you should be able to get 336w out of it if run on a 48v battery, assuming it can run 48v.
A far cheaper option would be an aftermarket controller. Running your current 36v battery at 13a would give you around 470w.
If it's 250w @36v, you should be able to get 336w out of it if run on a 48v battery, assuming it can run 48v.
A far cheaper option would be an aftermarket controller. Running your current 36v battery at 13a would give you around 470w.
I did wonder this, if it was easier to just buy a new controller. Do you happen to know what I should be looking for in a new controller and would it be easy to wire up?
The inside of the controller is coated with something, probably that clear jelly stuff, which would make shunt soldering difficult. The wires are blocking the view of the pcb, so I can't see what type of shunt you have.
The label is not very helpful either. I would guess that the 22 and 3 in the designation means 22A and 36v, but that's a pure guess. You'd have to measure it with a wattmeter or similar to determine what it is.
The label is not very helpful either. I would guess that the 22 and 3 in the designation means 22A and 36v, but that's a pure guess. You'd have to measure it with a wattmeter or similar to determine what it is.
Would you happen to know which controller I would need? Would it be easy enough to wire up? If I was to get a new controller and a 48v battery. What kind of power would I get them? Or is that not worth it?
This will run your motor at 13a. It can run 24-48v according to the specs however I think it actually goes up to 52v.
It WILL need wiring in. 3 wires for throttle, 2 for power, 3 for PAS if you want that, 3 for motor and I think 5 for hall sensors.
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It WILL need wiring in. 3 wires for throttle, 2 for power, 3 for PAS if you want that, 3 for motor and I think 5 for hall sensors.
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It's impossible to recommend anything without knowing how much power you already have. Does your LCD have a setting to display power? If not, you should wire in a wattmeter to show what's happening. To mwasure the maximum power, lidt the wheel off the ground, spin it up with the throttle, then apply the brake to slow it right down while you hold full-throttle.
There are modifications that you can do to these meters to allow you to fit them remotely, like on the handlebars, where you can observe your power at all times, which is very enlightening regarding how an ebike works, and you can then use one as an accurate battery meter for range.
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There are modifications that you can do to these meters to allow you to fit them remotely, like on the handlebars, where you can observe your power at all times, which is very enlightening regarding how an ebike works, and you can then use one as an accurate battery meter for range.
This will run your motor at 13a. It can run 24-48v according to the specs however I think it actually goes up to 52v.
It WILL need wiring in. 3 wires for throttle, 2 for power, 3 for PAS if you want that, 3 for motor and I think 5 for hall sensors.
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Thank you so much for that. It looks like it should all be mostly plug and play apart from a few wires. Is that right? Would I need to use that display or could I use the one that's already on my bike?
Controllers and displays will only work when bought as matched pairs.
Yhere mat well be some soldering needed between new controller and existing system.
Yhere mat well be some soldering needed between new controller and existing system.
Hi , I’ve got a super monkey , with the 250/350/500 bafang motor , mine has the 48v battery, loads of acceleration but it stops at about 17mph , how did you manage to increase your top end?
How did you manage to take the restriction off? Been looking around for a long time but can't seem to find any answers
Bear in mind your bike is as about as aerodynamic as a brick. So if your mates are of the 70kg wet through and on drop bar bikes type then you're going to need an exponentially higher amount of watts to keep up with them
