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Frontline Emergency Solutions



Regular price £429.00 GBP
Regular price Sale price £429.00 GBP
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Product Information

The Pro Batt Ultra is a DC to DC charger that is installed between a battery that is being charged by the alternator and an additional battery that you wish to charge. The BB122470 charger provides a 4 stage charging profile to any leisure or house batteries that you wish to charge resulting in substantial charging improvements over the standard alternator setup and improved health and maintenance of your batteries.

The BB122470 will boost the voltage to the batteries if input voltage is too low & reduce the voltage if the supply current is to high ensuring the optimal charging current is maintained at the batteries.

The BB122470 will take your 12v vehicle and provide a charge of upto 70A at 24v for your 24v battery bank.

The BB122470 is fully compatible with the latest EURO 5/6 Regenerative Braking Systems and smart charging alternators where a standard split charge relay does not suffice.

Compatible with Mercedes Benz Blue efficiency, VW Blue Motion, Ford Econetic and Vauxhall Ecoflex systems amongst others

Multiple Activation Modes -

  • Automatic for most non vehicle applications
  • Manual for remote activation.
  • Regenerative braking (requiring ignition feed),
  • Automatic regenerative braking, requiring no ignition feed.

The Current is NOT taken from the input battery and given to the output battery. The B2B uses alternator power to charge the output battery. Manual mode and regenerative braking mode allows you to override this.

All prices shown are exclusive of VAT

Supplied Individually



  • 100% fire proof plastic box.
  • No screws to corrode.
  • Thermal power reduction.
  • Multi stage fan cooling
  • Night Time Setting: Allows the unit to ran at half the power so the fan noise is kept down.
  • Boost / Reduce Charging: The B2Bs ensure batteries get the correct charging profile irrespective of high or low input voltages.
  • B2B turns on at 13.3V and turns off at 13.0V Thus, does not drain input battery. Regenerative braking mode allows the input voltage to drop to 12.2V
  • Customizable Profile: Choose your own charging profile on the front panel.
  • 9 preset battery chemistry options: Including AGM, LiFePO4, Gel, Flooded and sealed lead acid.
  • 4 stage battery charging: The B2B charges batteries between 5-20 times faster than a stand alone alternator.
  • Very Simple to install: No electronic Control Unit (ECU) issues. No complex wiring. No warranty issues.
  • Fully prepared for smart alternators (regenerative braking).
  • Optional Remote Control
  • Supplied Brand New & Boxed with 2 year's warranty
  • Dimensions (mm): 190 L x 160 W x 70 D
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