Fully outfittedLog SkidderLithium ConversionInstrumentationOffboard Charger
OwnerMr. Sharkey
Owner's Other EVs1981 Volkswagen Rabbit L
Pusher Trailer
LocationMinerva, Oregon United States map
Web/EmailWebPage email image
Vehicle1971 General Electric Elec-Trak 26AE20BA
MotorGeneral Electric Compound Wound DC
20 HP
Drivetrain4 speed Peerless differential
ControllerGeneral Electric
3 stages resistive armature, full armature, 4 stages field weakening - relay operated
Batteries10 Nissan Leaf G2 modules, 7.20 Volt, Lithium-Ion
Leaf modules are connected 2 in parallel each, with 5 parallel pairs in series. Nominal voltage is 36 volts

Rear battery compartment still holds four Trojan T-105 lead acid cells to run the cable winch and to provide weight over the drive wheels for better traction
System Voltage36 Volts
Onboard: Todd Power Source PS45. The three 12 volt modules in the charger were wired in series to provide 36 volt, 15 amp charge current.

Offboard: An ancient Cushman 36V, 25A transformer-based boat anchor manufactured by Lester. Modified to allow variable charge rates which are selected by a rotary switch connected to mulitple taps on the transformer primary.
HeaterSolar exposure, adjustable via vestments
DC/DC Converter
Two 36v-to-12v DC/DC converters supply power to instrumentation and LED headlights.
InstrumentationClean Power Auto EV Display digital meter and automotive fuel gauge to display SOC
Top Speed9 MPH (14 KPH)
too fast!
RangeMowing: 5 acres, tilling: one-half acre
Seating Capacity1 adult or 5 plus kids
Curb Weight900 Pounds (409 Kilograms)
approximately, depending on accessories
TiresElecTrak Turf-King, front: 16 x 6.50 - 8, rear, 23 x 9.50 - 12

Custom-fitted tire chains with steel cable tensioners
Conversion CostAnyone who keeps tack of what they spend isn't a hobbyist
Additional Features3 blade, 3 motor, front-mounted mower deck
4 tine tiller with separate 14 HP 36 Volt motor
60" dozer blade
Rear mounted electric cable winch
Regenerative Braking
Epoxy enamel coated battery compartments
20 and 50 Amp, 36 Volt accessory receptacles
Accessories can be run from a 1kW 36vdc-to-120vac rotary inverter
Flame-thrower LED headlights
Conversion from lead acid to Lithium has brought new life to this 50-year-old tractor. An ongoing project, it still needs a BMS installed on the Leaf modules before it can be considered "safe" to charge without constant supervision.

code by jerry