Motive powerAxle tipsSide ViewEnd of the line
OwnerMark Fisher
Owner's Other EV2004 Yonkang Crown SEC-R700
LocationTakoma Park, Maryland United States map
Email email image
Vehicle2009 Xtreme XB-600
"Motorized Bicycle"
Motorunknown Brushless DC
600 watt Hubmotor
DrivetrainHybrid: Pedal/chain and hubmotor. Pedal drive is absolutely useless, only added as legal fiction. My state sees this as a low-power step-through scooter, so I have removed drive chain.
Batteries4, 12.00 Volt, Lead-Acid, Gel
20AH SLA. Described as "Colloid Shortage Battery" [sic].

Rewired so series jumper plug supplies 48V for operation.

Pack failed after two years daily use and 2000 miles. Replaced with same
System Voltage48 Volts
ChargerVector 2-6-10
Rewired to a parallel plug, charging all 4 at once @ 12V.
DC/DC Converter OEM
Output Cap blew after hitting a speed bump and put full pack voltage to 12V side. Wiring seems to have a common ground for both 48V and 12V circuits :(
Just added "DrainBrain" (Old, unused stock) so now I'll have an odometer, as well as a reliable measure of power usage.
Top Speed20 MPH (32 KPH)
Governor controlled
Range20 Miles (32 Kilometers)
"Brochure value" Untested in reality.
Watt Hours/Mile43 Wh/Mile
This is WH consumed "at the plug," including charger losses.
Seating Capacity1.5
Curb Weight216 Pounds (98 Kilograms)
"Book value." It doesn't seem that heavy...
Tires12 x 2.5
Additional FeaturesFairly aggressive dynamic braking is an un-advertised function. It helps reduce break wear on the otherwise marginal drum braking system.

On long downhills, up to 300 Watts of regen is taken out of the system at speeds above 20 MPH.
The user community is full of folks complaining about speed and hill climbing of the XB-600, but both are adequate for the promised function. The governor-limited top speed is frustrating on long flats, but there aren't many of those around here...

Pack died after two years. See photo!

code by jerry