OwnerSteven Arlint
LocationPortland, Oregon United States map
Web/EmailWebPage email image
city bicycle
MotorKolmorgan Brushless DC
300 Watt hub
DrivetrainHub motor for electric, 27-speed for pedaling
Gordos 50 Volt 30 Amp solid state relay with heatsink
Batteries3, 12.00 Volt, Lead-Acid, AGM
7 Ah (flame retardent)
System Voltage36 Volts
36 Volt 1 Amp
DC/DC Converter
36 to 5 Volt zener regulator for controller trigger
Top Speed20 MPH (32 KPH)
(a.k.a the legal limit for e-bikes in Oregon)
Acceleration0 to 20 MPH in 8 seconds with 170 pound rider
Range15 Miles (24 Kilometers)
on flat land at 20 MPH motor only
Seating Capacity1 adult
Curb Weight60 Pounds (27 Kilograms)
Tires26 inch pumped hard
Conversion TimeA little bit here and there.
Conversion Cost$180
Additional FeaturesI also have a 48 Volt 9 Ah NIMH pack for longer commutes. Not as good on hills though. The Yuasa's were bought surplus and there are spare packs at various locations that I travel.
Surplus solid state relays work great for e-bikes. I had a controller with speed control. Most times, I had it full on anyways. These solid state relays won't fail in the Oregon rain like most cheap PWM controllers and don't fatigue like similar size mech relays especially at 48 Volt. The website is for a whole other project.

code by jerry