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ProBoost40 40A lithium DC–DC charger with solar input

SKU: 9358381000449Categories: , ,

$449.95 inc GST

  • In vehicle multi-stage DC-DC charger
  • Dual input MPPT solar/aux (alternator)
  • Multi battery chemistry selector
  • Suitable for modern smart alternators
  • IP66 rating – resistant to dust, water and shock damage
  • Maintains a 100% state of charge of auxiliary batteries
  • BMPRO signature durability and ease of use

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Intelligent DC-DC chargers 

BMPRO’s ProBoost40 is a DC-DC battery charger that allows you to charge a secondary battery using solar panels and/or a towing vehicle’s 12V electrical system. The ProBoost40 blends both the solar and auxiliary inputs together, up to a maximum of 40A, to ensure there is always a consistent charge to your battery. Compatible with both lead-acid and lithium LiFePO4 batteries, the high-power density design of the ProBoost25 provides efficiency of up to 95%.

The ProBoost40 has an ultra-thin design, making it suitable for installation in small spaces, and is resilient to shaking, as well as wet, dusty or muddy environments. A range of protective features built into the ProBoost40, such as over temperature, overvoltage and under voltage protection, will guard your charging capacity.

Click here for the Product Manual and Product Datasheet.

Product Specifications

  • Input Voltage 9-18V DC
  • Solar Input Voltage 10-32 V
  • Maximum Input Current 47A
  • Input Fuse Rating 60A
  • Continuous Output Current 40A
  • Output Fuse Rating 60A
  • Minimum Start Voltage (Lead-Acid) 4V
  • Minimum Start Voltage (LiFePO4) 0V
  • Standby Current <15mA
  • Battery Chemistry STD, Gel, AGM, Calcium, LiFePO4
  • Operating Temperature -20°C to 80°C
  • IP Rating IP66
  • Dimensions 183mm x 130mm x 43mm
  • Charge Type 3-Stage
  • Maximum Voltage (STD) 14.4V
  • Maximum Voltage (Gel) 14.1V
  • Maximum Voltage (AGM) 14.7V
  • Maximum Voltage (Calcium) 15.3V
  • Maximum Voltage (LiFePO4) 14.5V
  • Float Voltage (STD) 13.4V
  • Float Voltage (Gel) 13.5V
  • Float Voltage (AGM) 13.4V
  • Float Voltage (Calcium) 13.6V
  • Float Voltage (LiFePO4) 13.6V
  • Turn On Input (Standard Alternator) >13.1V
  • Turn On Input (Smart Alternator) >12.0V
  • Turn Off Input (Standard Alternator) <12.8V
  • Turn Off Input (Smart Alternator) <11.8V


Will the ProBoost40 work with smart alternators?
A. Yes, the ProBoost40 will work with smart alternators.

What type of fuses should I use with the ProBoost40?
A. We recommend using bolt down fuses, as they ensure a low resistance connection. Blade type fuses are not recommended. These fuses can result in a high resistance connection which causes excess heat, which may damage the fuse holder and/or the wiring.

Self-resetting circuit breakers are not recommended. These may trip prematurely due to the heat generated by the current flowing through the wires.

How do I set the ProBoost40 to work with my battery type?
A. To set the battery type of the ProBoost40, press the Mode button on the front of the ProBoost40 until the LED is lit for the correct battery. The supported battery types are:

  • STD: standard lead-acid batteries.
  • GEL: gel lead-acid batteries.
  • AGM: absorbent glass mat lead-acid batteries.
  • CAL: calcium lead-acid batteries.
  • LiFePO4: lithium iron phosphate batteries.

Can I use the ProBoost40 inside my engine cabin?
A. Yes, you can use the ProBoost40 inside your engine cabin. The ProBoost40 is designed to be installed in a variety of environments, including the chassis rail, engine cabin and driver cabin.


Additional information

Weight5.4 kg
Dimensions30 × 15 × 5 cm





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