information RE GNG kit.

[Green Horn]

I have a 48v 20 amp Li ion battery a 60 v 650 w GNG brushless mid drive motor and a controller that came with my kit and absolutely no experience with any of this, my goal is to be able to climb at slow speeds and have as long as possible range with my system, speed is not a necessity . currently I only have about a 1 mile range before my system shuts down and re starts intermittently, my battery still has a full charge, would this be most likely a controller issue? my bike is also to fast for my needs and need help slowing it down I would prefer 2 or 3 speeds max from 2 to 3 mph in low and a max of 10 mph give or take, would really like to DIY but would appreciate all the guidance and information I can get. Thanks Green Horn

 

[dogman dan]

Sounds to me like you are running a 60v setup on 48v. The controller shuts off when it should, for a 60v battery.

Add 12v 20 ah in parallel.

The GNG guys might know a hack to lower the low voltage cutoff.

Once you get up and going, use the lower gears for crawling up the hills slow. Better full throttle low load, than half throttle high load.

If your low gears are not low enough, bigger rear freewheel gears will help. But the kit is likely stuck with a fairly large front sprocket.

 

[Green Horn]

Is there a 60 v battery already pre made for the GNG 60v 650 w motor kit?

 

[Green Horn]

Looking for a 72 tooth 4 bolt 8mm sprocket that's not 3 months out? any suggestions?

 

[Green Horn]

Trying to diy with know previous knowledge in the electric bike world, I can build a house but not a E bike, help appreciated.
I'm currently putting together a GNG kit with a 48v 20 amp Li ion battery and a 60v 650w motor with poor results, tons of power and no distance, it was brought to my attention to add a 12v battery to my system and bring it up to 60v as swell and that would most likely solve my problem. Is there a 60v battery already available? im not a battery maker. thanks, Green horn.

 

[teslanv]

You will want to become a battery maker.
It looks like your battery may not have enough discharge capacity. If running a 48V 20Ah battery, you should not be running more than 20A continuous (1"C") otherwise it will not be good for the battery. The solution is to add more capacity (another 48V 20Ah battery in parallel with the first) or get a different battery that can tolerate a higher amperage draw.

 

[999zip999]

How many miles ? 20-28 miles. What is your controller amp draw ? What 48v20ah battery ? Li - ion means lipo,lico, lifpo4,LiMn and many more. So ? All with different power levels uses.

 

[Green Horn]

Only getting 1 to 3 miles battery is fine but the controller shuts off ittermitintey, controller issue possibly?

 

[mark5]

Sounds to me like you are running a 60v setup on 48v. The controller shuts off when it should, for a 60v battery.

Add 12v 20 ah in parallel.

The GNG guys might know a hack to lower the low voltage cutoff.

How about what dogman told you before above?

Also see Wishes' post about his controller.

 

[teslanv]

If you are hitting the low volt cutoff early with the 48v battery, then you would want to add a 12v 20Ah battery in SERIES to the 48v to get a 60V battery, not parallel.
Connecting a 48V battery and a 12v battery in parallel would result in fireworks.

 

[d8veh]

Get a S12S controller from BMSBattery. You can switch it to current control (torque simulation),which is much better for a crank drive. You need to buy a LCD to go with it plus a wheel-speed sensor. It'll have the correct LVC,so that you can use your whole battery capacity. Your present controller's LVC is too high. You can change it if you want to solder in a resistor.

 

[Green Horn]

Thank you for everyone's help at least now I have options, greatly appreciated, Green Horn.....

 

[dusan]

Hello Green Horn,
Were you able to correctly run GNG with S12S? I red, there needs to be set some advanced setting because GNG has 120 degrees phase but hub motor, for which was controller develope, only 60 ddegrees.
I wanted to use S12S with GNG because of great PAS support.
Thanks