|Location||Selbourne, Tasmania Australia map|
|Vehicle||1992 Subaru Brumby |
4WD Subaru Brumby utility. The Brumby was sold as a "Brat" in some countries.
|Motor||Kostov 17R Series Wound DC|
Has an over temperature switch, which I have wired into a handy warning light in the dash.
|Drivetrain||Original 4WD gearbox with clutch|
The first one blew up, but Kelly quickly replaced it under warranty.
Controller is mounted vertically on a 6mm thick piece of aluminium. There are spacers under the aluminium so that air can flow through underneath. Also two 12V fans are mounted on top of the controller.
|Batteries||12 Century Battery Company C12-140DA, 12.00 Volt, Lead-Acid, AGM|
140Ah @ C20
I used Lee Hart's Zener regulators to help keep the batteries balanced.
|System Voltage||144 Volts|
|Charger|| Chennic JCWP14408|
Secondhand charger was cheap if slightly undersized. Takes about 9 hours to charge after a 36km trip.
The charger does not always turn off automatically like it is supposed to. This may be because of the zener regulators on the batteries. I built a circuit that turns it off if the lamps glow brightly for a few minutes.
|DC/DC Converter||Iota DLS-55|
|Instrumentation||Zeva Fuel Gauge Driver + shows "state of charge" using the fuel gauge. It also shows instantaneous current draw using an aftermarket tachometer that I bought for the purpose.|
I also use the exsisting engine temperature gauge. I have a switch so that I can see the temperature of either the motor or the controller. I have glued thermistors onto the motor and controller.
|Top Speed||71 MPH (114 KPH)|
This speed is readily attained. Might go faster under ideal conditions.
|Acceleration||OK, considering how heavy it is. To get better acceleration, change up a gear.|
|Range||31 Miles (49 Kilometers)|
50km trip along a road with some hills, some T junctions & many corners.
Can go 60km (or more) if speed is limited to 60km/h.
|Watt Hours/Mile||384 Wh/Mile |
This was from a trip of 36km, not many hills but lots of corners.
|Seating Capacity||2 adults|
|Curb Weight||3,218 Pounds (1,462 Kilograms)|
Since it is a utility I could add extra weight without going over the manufacturer's limit. It is now exactly on the limit.
|Tires||Low Rolling Resistance|
|Conversion Time||18 months|
|Conversion Cost||$12,000 Aus Dollars|
|Additional Features||Batteries are heated when plugged into the mains socket.|
Demisting is required by Australian regulations, this is provided by a 12V hairdryer mounted pointing at the windscreen.
|Kostov motor seems well matched to the Kelly controller. The motor gets to about 60°C under heavy load but the controller only gets to about 40°C. The highest I've seen current draw is just over 500A (at battery).|