44 or 48 volts ????

[bigisland]

I am thinking of running a BMC V2t hub and wondering what differences in performance I will see at these two voltages?

Thanks

 

[neptronix]

0.5-2mph difference.

 

[dogman dan]

Or even no difference, if you are talking nominal voltages. One nominal might be rediculously low, like lipo. So most of your run with 44v lipo would be at a lot higher voltage.

In general, I typically see about 4 mph difference between 36v and 48v for instance. So 1 mph = 3v is a usable rule of thumb for the (actual, not nominal) 30v-60v range. Above that, things change because of faster speeds and wind resistance.

 

[spinningmagnets]

If you use a high amp-draw hub like a 9C, you have to have at least a 15aH sized battery to keep voltage sag on accelleration down to a minimum. So, if you don't want the size or expense of a 15-20 aH pack of LiFePO4, go for the LiPo.

LiPo will give you very little voltage sag, so your acceleration will be better, but as stated abbove, your top-speed will be 1-2 MPH lower.