Unique Products for Your Boat

Sterling Power 24V BB242435 35A 24V to 24V / Battery to Battery Charger *NEW*

$434.00 $428.00


 Click Here For International Shipment Info


SHIPPING: We make every attempt to ship Sterling Products as fast as we can. However, in order to keep your costs lower, flat-rate shipping items (subsidized by us) are shipped out after any expedited orders and there can be delays in how quickly we get these orders shipped. Please be patient, it will saves you money. All flat-rate shipping products are ground shipping from Maine..


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 BB2242435 is a 35A fully independent buck (drop voltage) or boost (increase voltage) 24V 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 BB242435 can then send the Start/AUX/Windlass/Thruster battery either a higher or lower voltage than the house bank requires. These units can also independently float the start, windlass or thruster battery, even before the house bank has entered float.

Imagine you have a 600Ah GEL house bank that needs to be charged at 28.2V and a Odyssey TPPL AGM start or windlass battery that needs 29.4V. The Sterling BB242435 can do this! The BB242435 can take an input voltage of as little as 26.4V and boost the output to 31.0V, depending upon the charge voltages chosen. It can even equalize an AUX from a house bank even if the house bank voltage is only at 26.4V.

The BB242435 is perfect for charging a starting, reserve, windlass or bow thruster bank using fully independent 4 stage smart charging. It is not just voltage following the house bank. The Sterling BB1242435 is not just a simple "voltage follower", like other DC to DC chargers, it's a true smart battery charger that charges from one DC battery bank to another DC battery bank.

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 BB1260 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 BB242470 turns on at 26.2V and turns off at 26.0V.

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 BB242435 can also equalize your bow or start battery when required.

Very Simple to install: No complex wiring

Battery Temp Sensor:  The BB242435 comes standard with a remote on-battery temp sensor.

Optional Remote Control:  The BB242435 can be fitted with an optional remote control.