TROLLBRIDGE12X24 Charge 24-Volt Trolling Batteries User Manual
- June 3, 2024
- TROLLBRIDGE
Table of Contents
12X24 Charge 24-Volt Trolling Batteries
User Manual
TROLLBRIDGE12X24 Charge 24-Volt Trolling Batteries
TROLLBRIDGE12X24® (TROLLBRIDGE24+COMBINER100) CHARGE 24-VOLT TROLLING BATTERIES FROM 12 VOLTS
SUMMARY
«;) July 2010
The Trollbridge12X24® is a 12-volt Combiner100 and Trollbridge24 all in one
package, which allows you to charge your 24-volt trolling motor battery from
the 12-volt alternator on your main engine, from your trailer hookup, or from
any single or multi-output 12-volt charger without risk of running down your
starting battery. It works automatically by putting two 12-volt batteries in
series when you need to run the trolling motor, and putting them in parallel
for charging. It only charges the trolling batteries when the main engine is
on.
FEATURES
- Fully automatic, no switches or connectors to change
- Starting battery will never discharge into trolling motor
- Both batteries operate in parallel when not trolling
- Automatically switches in series for 24-volt output
- Batteries are only charged when the engine is running
- Eliminates the need for multiple output chargers
- Can be conveniently located with the batteries
- Rated for 12-volt alternators up to 100 amps
- Rated for 24-volt trolling motors up to 85 amps
- Use the Trollbridge2400 for up to 600- amp loads
- Use the Trollbridge24 if you already have a Combiner
- Use the Trollbridge24 on TWO battery systems
- Green LED indicates 24-volt output active
- Amber LED indicates charging is in progress
- One year, factory direct limited warranty
- Waterproof – will operate submerged in salt water
- Ignition rated for explosive atmospheres
- No voltage drop so batteries reach full charge
- No voltage drop so motor gets full power
- No wasted power, no heat sink or cooling required
- No modification to alternator or 12-volt wiring
- Simple six-wire basic installation
- Comes with all cables for basic hookup
- Draws no current when off
- No diodes to burn out if accidentally shorted
- Withstands ambient temperature to over 175 F (80 C) for engine compartment mounting
DANGER: During installation voltages may be present on unattached cables. Make
sure these do not short out to boat ground, battery positive, or to each
other. 15% of Trollbridges are DESTROYED due to installation errors.
WARNING
Fuses are not normally used on the trolling battery positive cables however if
you do BOTH must be fused.
HOW IT WORKS
The Trollbridge12X24 ® connects two 12-volt batteries to your starting battery
to make 24 volts. The two trolling batteries are in parallel at 12 volts when
not trolling.
When the starting battery reaches 13 volts or more the amber LED comes on and
the trolling batteries receive charge.
The first trolling battery can also be used as a house battery for other
12-volt loads ..
The second “trolling” or “booster” battery is used only for the trolling motor
and cannot be connected to anything else.
INSTALLATION
We recommend 6-gauge wire for the motor cables and for extending the supplied
cables. Tap cables to terminal before connecting to check for sparks, which
indicate a wiring error.
DO NOT run multiple cables together in a plastic conduit, they are rated for
60 amps in free air. In conduit they may overheat and melt insulation.
OK to cut off terminals to extend cables.
- IMPORTANT Remove any existing jumper from trolling battery 1 positiveto battery 2negative. Sometimes this jumper connection is inside the trolling motor plug.
- Any existing battery charger cables can be left as-is.
- Connect starting battery negative to the first trolling battery negative with a black cable. 10-gauge is OK but if the run is over 6 feet, use 8- or 6-gauge.
- Connect the BLACK Trollbridge12X24® ground wire to the negative of the first trolling battery. Lengthen if needed.
- The RED cable is connect to the positive terminal of the first trolling battery which can also be used as a house battery. SHORTENING THIS CABLE WILL VOID THE WARRANTY*. Extending is OK If you want a safety breaker in this circuit it should be rated at 100 amps maximum. See WARNING – – if fused the PURPLE cable must be fused also.
- Connect the GREEN cable to the second trolling battery negative terminal. No other connections should be made to this negative battery terminal. SHORTENING THIS CABLE WILL VOID THE WARRANTY*. Extending with 8- or 6-gauge wire is OK.
- Connect the PURPLE (sometimes WHITE) cable to the second trolling battery positive terminal. The trolling motor does NOT connect to this terminal. No other connections should be made to this positive battery terminal. SHORTENING THIS CABLE WILL VOID THE WARRANTY*. Extending with 8- or 6-gauge wire is OK. If you want a safety breaker in this circuit it should be rated at 100 amps maximum. See WARNING – – if fused the RED cable must be fused also.
- The wire connects to the starting battery positive terminal. SHORTENING THIS CABLE WILL VOID THE WARRANTY*. Lengthening with 10-gauge is OK but if the run is over 10 feet use 8- or 6-gauge.
- The BLUE cable connects to the trolling motor positive input. This cable can be shortened if desired. No other connections should be made to this cable. Extend with 8- or 6-gauge wire where necessary. A circuit breaker in this circuit, current rated for your motor, is highly recommended.
- The negative side of the trolling motor connects to the main negative terminal of the first trolling battery. (It does not connect to the negative terminal of the trolling battery that has the GREEN cable.) 6-gauge wire is recommended.
- If you want to install an optional remote indicator that shows when you are in 24-volt mode use any 12-volt rated panel mount indicator and connect one wire on the common negative (BLACK) terminal and the positive to the second trolling battery negative terminal (with the green cable).
- The terminal post is used on rare occasions with a starting button for trolling motors with electronics that won’t start up on 12-volts. It is connected to +12 (red cable) through a push button. Pushing the button forces 24-volt mode which will then continue operating until the trolling motor is turned off.
OPERATING INSTRUCTIONS.
The Trollbridge12X24® automatically puts the batteries in series whenever you
turn on the trolling motor. When not trolling, there is only 12-volts going to
the motor to detect when it gets turned on. As soon as it is turned on, the
voltage switches to 24-volts and the GREEN LED turns on.
When the trolling motor is off for about 30 seconds the batteries are put back
in parallel. If the main engine is running and the starting battery is over 13
volts, the amber LED will turn on and both batteries will receive a charge.
Running both motors at the same time does no harm although only one battery
will get charged but unequal charging on the batteries is not a problem since
the batteries equalize every time the trolling motor is off.
12/24-volt motors will work OK. They will use both batteries in parallel for
12-volts and in series for 24-volt operation. Connect the 12-volt motor input
to the same battery terminal as the RED wire from the Trollbridge12X24®.
Although the Trollbridge12X24 draws no current when idle, many trolling motors
draw current even when turned off so the breaker in the BLUE cable should be
turned off or the motor unplugged when not in use. 
TROUBLE SHOOTING
The amount of charging available is limited by the alternator output and how
long it runs.
Repetitive cycling or a buzzing sound when applying a 24-volt load indicates
that one of the batteries is not connected correctly.
If it fails to switch to 24-volts when you turn on your trolling motor double
check your wiring but it may be because the trolling motor electronics won’t
operate while in the 12-volt mode. In this case, to use the
Trollbridge12X24® you will need to install a MANUAL CONTROL push button switch
that connects the small threaded stainless terminal to the +12-volt battery
terminal that has the RED Trollbridge12X24® cable on it. Pressing the button
forces 24 volts. It will stay in 24volt mode until the trolling motor is off
for 30 seconds. Light gauge wire is OK for the switch.
If it fails to switch to parallel (after a delay) when the trolling motor is
turned off the motor controls may be drawing current even when OFF. You will
need a switch in the BLUE cable such as a 50-amp breaker to prevent it
discharging batteries and allow the Trollbridge12X24® to switch back to
12-volt charging mode.
SHORE POWER CHARGING
A single output shore power charger can be connected to the starting battery
to charge all batteries. If you have a multi-output charger already installed
there is no need to change the connections.
WARRANTY
* WARRANTY VOID IF BATTERY LEADS ARE SHORTENED
otherwise we offer a one year factory-direct limited warranty, effective from
date of original purchase. 15% of Trollbridge 12X24s are destroyed due to
installation errors, which blow internal fuses and melt insulations or wire.
Check at http://www.yandina.com to get service information and the warranty
return address.
TECHNICAL EMAIL QUERY
techsupport@hypertech.com
or call 901-382-8888