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INSTALLATION AND OPERATION MANUAL
Introduction
The Digital Duo Charge provides a safe method to charge your engine
starting battery. Unlike switches, isolators and other charge splitting
devices, the Digital Duo Charge installs between the vessel’s house
and starting batteries rather than between the alternator and batteries.
This allows the alternator and regulator to concentrate output based
on the house battery’s needs. When the Digital Duo Charge senses
charging voltage at the house battery, it works like a DC-to-DC battery
charger, providing up to 30 amps of regulated charging current to
support the starting battery.
In most installations, the Digital Duo Charge requires just four wires
for operation; a fused input wire, a fused output wire, a ground wire
and an ON/OFF wire. In applications where the Digital Duo Charge
is used to supply a battery bank that may require more than 30 amps
of regulated charging current, the Digital Duo Charge may be used to
manually control an external solenoid. Please note the section in the
manual relating to solenoid control.
The Digital Duo Charge is designed specifically to enable its user to
control charging voltage output -- making it possible to safely mix house
and starting battery technologies. The Digital Duo Charge features four
different programs based on four battery technologies: Standard Flood-
ed, Deep Cycle Flooded, Gel and AGM battery types. In addition, the
Digital Duo Charge can be programmed for 12-volt or 24-volt operation.
When used with an optional Battery Temperature Sensor cable (MC-
TS-B), the Digital Duo Charge responds to a battery over-temperature
condition by automatically discontinuing charging output.
Safety Considerations
Before installing your Digital Duo Charge,
please take a moment to consider these guide-
lines for safe regulator installation. Failure to
work safely could result in injury or damage to
your electrical system.
1.
Always disconnect your battery banks and
ensure that switches are “OFF” prior to
installing your regulator.
2.
Remove loose-fitting clothing or jewelry,
which could become entangled in your
motor or other machinery.
3.
Wear ANSI-approved safety glasses.
4.
DO NOT modify the Digital Duo Charge.
Alterations could result in damage, and will
void your warranty.
5.
DO NOT attempt installation if tired or
fatigued.
6.
Ensure the engine has cooled before
initiating installation.
7.
DO NOT attempt installation while using
alcohol or medication that could impair your
judgment or reaction time.
8.
Always use the right tool for the job.
Improper tool use may damage regulator or
your boat and could result in personal injury.
9.
Take time to read the manual. Equipment
damage and possible injuries may result
from an incomplete understanding of the
installation and operation of the Digital
Duo Charge. If you are unfamiliar with DC
electrical systems, consult with a licensed
marine electrician.
Digital Duo Charge
DDC-12/24
©2017 Balmar LLC SUP- 0202 / REV.B 5/12/17
Introduction
1 Programming Duo Charge
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Safety Considerations
1 System Voltage
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Unpacking the Box
2 Adjust For Battery Type
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Installation Basics
2 Adjust Voltage Limits
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Basic Wiring Installation
2 Terminal Location Legend
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Input Wire/On-Off Wire
3 Troubleshooting
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Battery Temp. Sensor Drive
4 Duo Charge Wiring Diag.
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Digital Duo Charge Operation 5 Balmar Contact Info.
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Table of Contents
