Will 56 volts fry my controller?

hekdude · Feb 11, 2012

I have an E-bike kit, which is advertised to 48 V. I currently run on 36V, and was shipped 18V batteries instead of the 14.4V batteries I ordered, which I am planning on running in series with the 36V. Does anyone have experience with this.

I also have their geared hub motor. I don't want to smoke that either.

Gordo · Feb 11, 2012

You should be OK. Just take it i
easy at first and check the motor for heat. Don't use full throttle at low spp
eed on a hill until you see what heat you are getting

BikeFanatic · Feb 11, 2012

I have one of those controllers and I have run ping 48 volts ( actually 53 volts) and no issues. I heard you can go as high as 60
volts as the caps are 63 volts. Your mileage may vary... I have the older version from 2 years ago.

Drunkskunk · Feb 11, 2012

I run my 48 volt controller on 55.5volts of Lipo. peak voltage is at the componant's limit of 63 volts when full charge, but it's lasted several years like that.

Thats no gerontee, but it wil either work or it won't.

dnmun · Feb 11, 2012

what is 18V? from the statements, i assume you meant a 12V SLA battery when you say 14.4V. so what is an 18V battery?

did you measure the voltage on the 36V SLA and what is the voltage on this 18V SLA?

if you exceed 63V on the input, then the input caps are presented with above spec voltages.

neptronix · Feb 11, 2012

Open the controller and check out the capacitor voltages.

It will probably be about 63v.
So you need to stay a little bit under that, say 60v tops.
Measure what your battery is when fully charged when you add the other battery on top of the 36v.

It probably won't take that for very long, so look into an infineon controller that can pump out more amps AND take a max voltage of around 90-100v

hekdude · Feb 11, 2012

Thanks for the wisdom of the Sphere

dogman dan · Feb 12, 2012

We try. The more info you give us, the better the answers. Like exactly what the batteries are.

60v when fully charged should not harm anything in your controller. 63v is pushing it but may work fine. You should have 63v caps in a stock E-BikeKit controller for the direct drive motor.

dnmun · Feb 12, 2012

i once had 90V on the stock infineon controller, but just for few seconds and bench testing so no load.

it is so important to provide enuff info so people can help, like the dogman says.

E-BikeKit.com · Mar 1, 2012

Just FYI - we do offer a controller with 100v caps now.

dogman dan · Mar 2, 2012

That's good to know. To be honest, I haven't been keeping up with what anybody is selling too much lately. I've sort of drifted off into mostly dirt riding, and using non typical hubmotors.

Now that spring has nearly come, I need to browse and see who has what new this year.

Will 56 volts fry my controller?

hekdude

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