
BOOK# 091-20/20
INSTRUCTION MANUAL
AUTO CHARGE 20/20
AUTOMATIC BATTERY CHARGER
MODEL #091-20/20
KUSSMAUL ELECTRONICS CO., INC.
170 CHERRY AVE., WEST SAYVILLE, N.Y. 11796
TEL: in NY
NOTE :
This charger is designed for
vehicles with a single
battery system
INPUT :115 volt, 50/60 Hz, 10amps
3 YEAR WARRANTY
516-567-0314516-567-0314
516-567-0314 TOLL FREE:
516-567-0314516-567-0314
800-346-0857800-346-0857
800-346-0857 FAX:
800-346-0857800-346-0857
516-567-5826516-567-5826
516-567-5826
516-567-5826516-567-5826

INTRODUCTION
The Auto Charge 20/20 is a compact 20 ampere completely automatic battery charger
combined with a 20 ampere Battery Saver designed for installation on vehicles with a
single battery system. Remote sensing permits long lines between the charger and the
batteries by compensating for the voltage drop in the charging wires. The Battery Saver
provides 20 amperes of current to power 12 volt accessories whenever the vehicle is
connected to A.C. power. Ammeters are provided to indicate charger and Battery
Saver output currents.
Construction of the Auto Charge 20/20 is extremely rugged to withstand the shock and
vibration normally encountered by vehicle mounted equipment. The unit operates
completely automatically and stops charging the batteries when they are fully charged.
There is no trickle charge and therefore no danger of overcharging and water boil-off.
Parasitic loads from the vehicle should be connected to the Battery Saver. These loads
will be connected to the battery when the vehicle is in use but are removed
automatically when shore power is supplied and are then powered by the Battery Saver
power supply.
INSTALLATION
The Auto Charge 20/20 Automatic Battery Charger should be installed in an area with
adequate ventilation. A power cord is supplied for connection to 115 volts 60 Hz.
1. Mount the charger using the four holes provided for this.
2. Connect the wiring from the battery to the Output Terminal Strip.
3. Double check all wiring before proceeding.
5. Wire the A.C. power line cord to 115 volts.
6. Pilot light will light to show that the charger has power.

INSTALLATION WIRING DIAGRAM
WIRE SIZE CHART
CONNECTION ITEM DEFINITION WIRE SIZE
GROUND
BAT+
SENSE -
SENSE +
B.S. IN
B.S. OUT
BATTERY
NEGATIVE
BATTERY
POSITIVE
NEGATIVE
SENSE
POSITIVE
SENSE
BATTERY
SAVER
BATTERY
SAVER
NEGATIVE CHARGING LEAD
FOR BATTERIES
POSITIVE CHARGING LEAD
FOR BATTERY # 1
NEGATIVE VOLTAGE SENSE
LEAD. DETECTS VOLTAGE
POSITIVE VOLTAGE SENSE
LEAD. DETECTS VOLTAGE
FROM +12 VOLTS SWITCHED
BATTERY SOURCE
ACCESSORY POWER SUPPLY
POSITIVE (BATTERY SAVER IN)
12 AWG
12 AWG
16 AWG
16 AWG
12 AWG
12 AWG
IMPORTANT: Wire size is for a
maximum length of 20 feet. If wiring
is to be longer, larger wiring is required. Additional information is
available on request.
NOTE: The sense leads must be
connected to the battery for the
charger to operate.

SPECIFICATION & OUTLINE
Specification;
Input: 120 volts, 50/60 Hz, 10 amps
Output
Battery Saver: Output volts 12 VDC
Output current 20 amps max.
Battery Charger: for 12 volt battery
Output current 20 amps max.
Indicators: Power - indicates input po wer applied
Battery Saver - 0-25 amperes meter
Battery Charger - 0-25 amperes meter
Weight: 21 pounds
Warranty: 3 Years
OUTLINE DRAWING

INSTALLATION RECORD & WARRANTY
Date Installed
Installed By
Vehicle Identification
Vehicle Owner
WARRANTY
All product of Kussmaul Electronics Company Inc. are warranted to be free
of defects of material or workmanship. Liability is limited to repairing or
replacing at our factory, without charge, any material or defects which
become apparent in normal use within 3 years from the date the equipment
was shipped.
Kussmaul Electronics Company, Inc. shall have no liability for damages of
any kind to associated equipment arising from the installation and /or use of
the Kussmaul Electronics Company, Inc. products. The purchaser, by the
acceptance of the equipment, assumes all liability for any damages which
may result from its installation, use or misuse, by the purchaser, his or its
employees others.