What Voltage is considered a full battery charge?

[tlippy]

Is this your recollection of Full and Dead battery voltages? Does the controller shut OFF the battery if it reaches a critical low point?
Full = 52.6V Minimum = 41.5V

 

[rchenail]

I get about 54.2 full

 

[Sierratim]

This EBR POST has a chart of battery max and min voltages for typical battery chemistries. For your 48V battery the 13 series connected cells will range from a min voltage of ~3V each to a max of ~4.2V yielding a min pack voltage of ~39V and a max of ~54.6V.

The battery pack is equipped with a Battery Management System (BMS) that monitors the pack and cell voltages shutting off the pack before any over or under voltage condition can cause any damage.

 

[harryS]

Almost always, the ebike controller is set for a higher minimum than the battery BMS. Good conservative design approach, in my opinion.

 

[tlippy]

I have the "Tesla battery anxiety attack" syndrome. On my first charge my battery got to 40% after 25 miles of riding. I reckon I can count on 25 miles per charge

 

[Sierratim]

Looks like you were using an average of 12Wh/mile., using 300Wh over the 25 miles. Some use less, some more, often as a function of riding conditions and rider fitness.

40% is still a lot of battery left. Even if you want to keep your minimum battery charge to 20%, you should still be able to get 30-35miles out of a charge.