|Location||Richmond, Vermont US map|
|Vehicle||1981 Kawasaki KZ550 LTD|
|Motor||Perm Motor PMG 132 Permanent Magnet DC|
|Drivetrain||HTD belt reduction to jackshaft, 530 chain final drive|
|Controller||Alltrax AXE 7234|
Be careful with lithiums - the current limit on the AXE is averaged - with low esr batteries, your current can spike to 200% of the current limit for short periods. Recommend limiting top speed to 80-90%.
|Batteries||16 Dewalt DC9360, 36.00 Volt, Lithium-Ion|
Nanophosphate Lithium. These batteries are unmodified DeWalt 36 volt battery packs. Mounted in hacked up flashlight bases. I run them 2S8P (72 volts, 18.4Ah)
|System Voltage||72 Volts|
Charge on board with dual 36V 320Watt supplies - charge time about 2 hours.
|DC/DC Converter|| CUI|
200W DC/DC - very nice small package, wide input voltage range - available from Digikey.
|Instrumentation||Stock + 2 DVM for battery pack monitoring.|
|Top Speed||70 MPH (112 KPH)|
Can go 70, but because of my commute and direct drive, I have limited it to 52 by fixed gear ratio. That makes it very quick and fun on the roads I drive.
|Range||11 Miles (17 Kilometers)|
Commute is 6.7, 7.5, or 9 miles one way. Into town and back is 8 miles. Haven't gotten stranded yet!
|Watt Hours/Mile||110 Wh/Mile |
This is measured using Kill-A-Watt so it measures the total energy from line input and includes energy used by chargers.
|Seating Capacity||2 up|
|Curb Weight||230 Pounds (104 Kilograms)|
A little over half the weight of the original bike.
|Conversion Time||1 year (1 out of 4 weekends)|
|Geared this way and with 150 amp current limit still has plenty of gusto. No problem zipping up 5% grade at 45mph riding 2-up.|
I am now going into my fifth year of three season commuting on this bike. So far it has been trouble free - just oil the chain now and then, turn on the switch and twist the throttle and smile! It's a shame that A123 went bankrupt because these batteries are still the best in existence - several hundred full discharge/recharge cycles and they still run at full capacity - not a bit of sag detectable.
Keep those conversions coming, I am always amazed at the variety and creativity of conversions posted on evalbum. Looking for a conversion I can do for foul weather commutes. Counting on you guys for inspiration!