Carl Ervin's 1992 Sears Craftsman

Owner	Carl Ervin
Location	Waco, Texas United States ^map
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Vehicle	1992 Sears Craftsman 12.5 Hp 38" cut 5 speed lawn tractor
Motor	Briggs and Stratton ETEK Permanent Magnet DC 8 HP continuous, 15 Hp max, 3450 rpm at 48 volts, very durable, running now 14 seasons
Drivetrain	original 5 speed manual clutch
Controller	no controller
Batteries	4 Power Sonic PS-121000, 12.00 Volt, Lead-Acid, Gel 100 Ah
System Voltage	48 Volts
Charger	Soneil 48V battery defender, smart charger, 3.5 Amp
Heater	none
DC/DC Converter	none
Instrumentation	LCD voltmeter and LCD Ammeter
Top Speed	5 MPH ( 8 KPH)
Seating Capacity	1 adult
Curb Weight	400 Pounds (181 Kilograms) The battery pack added 270 pounds to the tractor
Tires	standard turf saver tires
Conversion Time	1 week
Conversion Cost	$1300
Additional Features	Full safety interlocks were retained in the system . Three PowerCheq modules are attached to battery pack to keep it balanced.
Mower pulls about 5 amps in neutral, 15 amps in normal mowing speed(#2), 70-125 amps in average-to-high grass, (mower deck engaged). It is fused at 250 Amps, motor max is 300 amps. Cuts high grass better now than when it was a 12.5 Hp gasser. I have a 120' by 120' lot, 2/3 of which is mowable, I have mowed it twice on a charge and the battery pack is still at 42V, 36V is minimum voltage allowed . 7/27/2019 Going on 14 seasons now, on 2nd set of batteries, powersonics really work well !! Had to replace some pulleys.

Craftsman“Green Machine (ZEV)”