|Location||Austin, Texas US map|
|Vehicle||2002 Kawasaki 250 |
Donor cycle with blown engine. Initially
converted with 72v SLA, but had range of only 10
miles. Updated with 72V 30Ah LiFePO4s.
|Motor||Mars ME0709 Permanent Magnet DC|
Used ME0709 (3300 RPM, 18HP peak, 24-72v DC.
Had to file a couple of brushes because they
were sticking. That was pulling down power (and
|Drivetrain||45/19 gear ratio.|
|Batteries||24 Hi-power 30Ah LiFePO4, 3.30 Volt, Lithium Iron Phosphate|
|System Voltage||72 Volts|
|Charger|| 72v generic|
To keep price down, I purchased a generic
charger that produces 5A/h (full charge in 6
hours from depleted).
|DC/DC Converter||Generic 24-72v to 12v|
|Top Speed||52 MPH (83 KPH)|
There's something wrong here.. Only pulling 92A
max. Should be able to pull 125A+. Changing
the brushes to see if that will fix it. @125A,
speed should be 65-70mph.
|Acceleration||Like a car. If I get the amps up, I'll decrease |
the gear ratio.
|Range||28 Miles (45 Kilometers)|
Still need to test limits
|Watt Hours/Mile||Still need to test|
|Seating Capacity||2 adults|
|Curb Weight||300 Pounds (136 Kilograms)|
|Conversion Time||200 hours|
|The goal was to hide the batteries and provide a shorter range/low |
cost solution. Originally, I thought 27Ah SLA batteries would give
me about 20 miles, but learned quickly that you're lucky to get 6Ah
out of them due to high current draw. For $400 more, I gained 24
30Ah LiFePO4 batteries. Well worth the extra cost. I put the cutoff
down low. Not sure what to do with the tank. It's just cosmetic at
this point. I would like to mount the charger plug in there, but
it's a PITA.