Unique Products for Your Boat

Sterling Power BB122470 12V In to 24V Out 35A Battery to Battery Charger

$449.00 $415.00


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Ideal for charging a 24V bow thruster or windlass bank from a 12V house bank!


The Sterling Power Pro Batt Ultra DC to DC battery to battery (B2B) chargers take battery to battery charging, or "Echo Charging",  to a whole new level.

The Sterling Power Pro Batt Ultra BB122470 is a 12V to 24V charger with 35A of output at 24V! It is a fully independent 12V to 24V smart battery charger. This means the voltage input battery, most often the house bank, can be programmed for it's own optimal charging voltage and the Sterling Pro BB122470 can then send the Start/AUX/Windlass/Thruster battery its own optimal charging profile.

Imagine you have a 600Ah GEL house bank that needs to be charged at 14.1V and a 24V Odyssey TPPL AGM bow thruster or windlass battery that needs 29.4V. The Sterling BB122470 can do this! The BB122470 can take an input voltage of as little as 13.3V and boost the output to 30V +, depending upon the charge voltages chosen.

The BB122470 is perfect for charging a 24V thruster or windlass bank with fully independent smart temp compensated charging.

The Sterling BB122470 is a true smart battery charger that charges from one DC battery bank to another DC battery bank. It does not need 120V C or 240V AC power to operate it simply charges from one 12V DC battery bank to the target 24V DC battery bank.

Sterling battery to battery chargers are ideal for charging from 12V to 24V.

Important Features:

Multiple Activation Modes: Automatic or Manual

Dedicated Voltage Sense Terminals: For those long bow bank runs where voltage drop can be an issue, the BB122470 features dedicated non-current carrying voltage sense leads for accurate sensing of battery terminal voltage.

Step-up options: Fully programmable including custom options and absorption duration customization

Boost / Reduce Charging: The B2Bs ensure batteries get the correct charging profile irrespective of high or low input voltages.

Auto On/Off: The BB122470 automatically turns on at 13.3V and turns off at 13.0V.

Profile Customization: Select your own charging profile on the front panel or build a custom charge program.

9 Preset Battery Voltage Options: Profiles for AGM, LiFePO4, Gel, Flooded and more.

4 Stage Battery Charging: Bulk, High Absorption, Low Absorption & Float / Maintenance

Equalization Mode: The BB122470 can also equalize your 24V bank when or if required.

Very Simple to install: No complex wiring

Battery Temp Sensor:  The BB122470 comes complete with a remote on battery temp sensor.

Optional Remote Control:  The BB122470 can be fitted with an optional remote control.