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www.balmar.net / Customer Service: +1 (360) 435-6100 x1 / Technical Support: +1 (360) 435-6100 x3
Tech Service is available Monday - Friday (8:30am - 7:30pm EST)
Unpacking The Box
Prior to installing the Digital Duo Charge, we recommend that you inventory the contents of the packaging and ensure that the
following items are included. Contact Balmar Customer Service at 360-435-6100 if any items listed below are missing.
• Digital Duo Charge
• Input Cable (Includes two ring terminal connectors and 30-amp ATC fuse and fuseholder)
• Output Cable (includes one ring terminal and one butt connector, with a 30-amp ATC fuse and fuseholder)
• Programming screwdriver (magnetic tip at end of screwdriver handle is used for programming, not the blade end)
• DDC-12/24 Quick Strike Guide
Installation Basics
The Digital Duo Charge MUST be mounted within the length of the Input Cable from the house battery. Four mounting holes
are included on the mounting tabs of the Digital Duo Charge. Ensure that the mounting location is protected from moisture and
temperatures in excess of 120º F. The Duo Charge should be installed far enough from inverters, navigational, and communications
equipment to ensure protection from radio frequency noise. The location of the Digital Duo Charge should make it possible to
easily view its LED display. The short length of the Input Cable and longer Output Cable allow the wiring to act like an electric
spring, enabling the Digital Duo Charge to address high battery loads more efficiently.
Wiring Basics
Once installed as described above, the Digital Duo Charge can be wired for proper operation. The following sections will describe
the recommended connection points for optimal charging performance. The four following connections are required.
Ground Wire
The Digital Duo Charge must be properly connected to system ground, which must be
shared between the house and starting battery banks, for proper operation. Failure
to do so will result in non-operation and potential damage to the device. Connection
to system ground can be made at one of the following: house battery negative post,
starting battery negative post, or system ground bus. User-supplied 14-gauge wire is
recommended. To install the ground wire:
1. Select a length of 14-gauge wire long enough to extend from the Ground
Terminal on the Digital Duo Charge to your intended ground source, such as
a ground bus as shown at right.
2. Crimp appropriately-sized ring terminal and 1/4” female spade connector to
the wire ends.
3. Connect the female spade terminal to the Ground Terminal on the Digital Duo Charge.
4. Connect the ring terminal to the desired ground source.
Output Cable
The Digital Duo Charge includes a 30-amp, fused 10-gauge cable with one ring terminal and a butt connector terminal. The
installer must supply the length of 10-gauge wire required to extend to the starting battery from the butt connector end of the
Output Cable. A minimum run of eight feet of wire from the Output Cable to the starting battery is recommended. Again, the reason
for the extra wire length is to act like an electric spring which allows the Digital Duo Charge to produce a higher current. To install
the Output Cable:
1. Attach the Output Cable’s ring terminal to the starting battery positive post.
2. Determine the correct length of 10-gauge wire to extend from the Output Cable to the Digital Duo Charge. Connect at the
butt connector. Attach a ring terminal connector at the end of the 10-gauge wire and connect to the Digital Duo Charge output
terminal.
