C965 Controller and Battery Voltage

[ScottR]

I had someone install the 8Fun on my bike. When I got home I downloaded the controller manual (https://drive.google.com/file/d/0BwlG_xMyE4xFUWx1QnZjUkk4bWs/view) . One thing I have found (page 2 of the manual) is that the manual states that the C965 is for 24V and 36V batteries. My bike is a 48V battery.

Is this a problem? Have they maybe updated this controller and I am working off an old manual?

 

[Shea N Encinitas]

In Electrical Parameters is looks like they have substituted amp for milliamps, if so it looks like you have a 30 amp bus, no problem. But whadda I know, nada. Ask the builder. Good luck. -S

 

[ScottR]

I have sent a message to my builder, but it has been a few days and haven't heard back from them. Over the weekend, I'll stop by as I have other questions to ask as I am getting used to the bike. The other question, the manual brings up is the ability to power lights from the controller. Paragraph 7.5 makes it sound like I could power lights. My builder told me it wasn't possible when I ordered the bike. Hence I am going to be adding independent lights. However, if it is possible I would much rather have my lights powered from the bike battery. Has anyone ever wired their lights to the battery with a 8Fun?

 

[Poohbear]

I have been riding bikes for 25 years but i recently had an accident at work and hurt my back and finding it hard to ride now and i really miss hitting the trails. So i am going to go electric and after a lot of searching i am thinking of getting 8 fun 750 watt and 48 volt 15 ah lithium battery to help with pedaling and hills etc. And i just wanted to know from people that have the 8 fun 750 kit what it is like as i don't want to get it if it is no good thanks in advance.

 

[flymeaway]

And i just wanted to know from people that have the 8 fun 750 kit what it is like as i don't want to get it if it is no good thanks in advance.

The only real issue for me is the battery size and weight. I have both a 36V 500W Bafang mid-drive on a Motobecane Elite Adventure and a 48V 750W Bafang mid-driev on a Cannondale MT1000 tandem. For me the location and battery weight make a big difference. As long as you mount the battery low on the frame the 48V 15A shouldn't be a significant CG or weight issue. I'd try to avoid a rack mount (higher CG on the bicycle = less stable).

I use the Motobecane as a commuter bike and have slightly more then 2,000 miles on it. It's a very capable e-bike and more then powerful enough for me (28 mikes a day) to go up fairly steep long hills. The 48V 750 on the MT1000 is more powerful and definitely will be a hill climber. As long as the installation is done properly you will have a good powerful set-up.

Court J.

 

[George S.]

The only real issue for me is the battery size and weight. I have both a 36V 500W Bafang mid-drive on a Motobecane Elite Adventure and a 48V 750W Bafang mid-driev on a Cannondale MT1000 tandem. For me the location and battery weight make a big difference. As long as you mount the battery low on the frame the 48V 15A shouldn't be a significant CG or weight issue. I'd try to avoid a rack mount (higher CG on the bicycle = less stable).

I use the Motobecane as a commuter bike and have slightly more then 2,000 miles on it. It's a very capable e-bike and more then powerful enough for me (28 mikes a day) to go up fairly steep long hills. The 48V 750 on the MT1000 is more powerful and definitely will be a hill climber. As long as the installation is done properly you will have a good powerful set-up.

Court J.

Hi,

I looked at your earlier threads on the 8Fun and Elite. Very impressive looking bike. I have an Elite, which is a pretty decent bike for the money. Some people have had issues with the mechanical disk brakes. We may not have the same brakes:

http://www.amazon.com/Tektro-Novela-Mechanical-Brake-Rotor/product-reviews/B003UY8TL0

You said something about importing the parts, maybe for resale. I wonder what the wholesale price of the motor kit is, what a bike manufacturer would pay? The batteries are not simple, but if you buy a pack on a factory bike the options are not so great, either. My replacement is $700. Who knows if it could be rebuilt with cells from somewhere. And the controller maybe has some issues, but maybe there are different controllers.

Seems like a very good way to go, if someone can build a bike. I'm pretty sure my bike shop guy could figure it out, and he would have the tools. The video was very helpful. With the miles you have on the bike, seems pretty rock solid.

 

[flymeaway]

Seems like a very good way to go, if someone can build a bike. I'm pretty sure my bike shop guy could figure it out, and he would have the tools. The video was very helpful. With the miles you have on the bike, seems pretty rock solid.

I put my 4 ebikes away for the winter, it's too cold in NH to ride. The EMotobecane turned out to be a fantastic commuter bike. The 500W BBS02 is rock solid...no problems whatsoever. I didn't have any trouble with the brakes, the only issue I had was the stock wheels that came on the bike but I swapped them out with Mavic's and ran them hard with only minor spoke tension issues. I'm building another ebike Using the Motobecane Cafe Latte. The parts spec:

MAC 500W 8T geared rear hub.
Grin Tech CA-V3
36V 15A - prismatic LiFePO4 pack...I do buy these from China and so far the two batteries I have bought are fine. At $240, 7-8 week delivery it's worth it.
I'll be building the battery box, same as the Elite.
Infineon Controller
Either a TCDM BB torque sensor, or PAS - haven't made up my mind yet

My estimated cost, 1600-1750. In my opinion if an individual is willing to spend the time, a custom build is as good as many name brand ready to ride. You certainly get exactly what you want.

If you want more info send your email to n4807g@gmail.com.

Court J.