With its IP66 rating , the ProBoost can be mounted anywhere , even under the bonnet of the 4WD – it is a fully sealed unit , so exposure to water and heat from the engine won ’ t be a problem . In fact , it has an operating temperature of -20 ° C to 80 ° C . However , this unit is really designed to be fitted anywhere in the 4WD , whether it ’ s in the engine bay , behind a seat or in the canopy of a ute .

ProBoost offers a full range of charging profiles . Whether yours is a lead acid or lithium battery , it provides multi-stage charging while offering a number of protective safety features , such as over-temperature , over-voltage and under-voltage protection . It ’ s also compatible with smart alternators – particularly important for newer 4WDs .

Essentially , it will take the voltage from the alternator and boost it to the correct voltage , using preprogrammed algorithms to take the battery that it ’ s charging through the bulk , absorption and float stages .

If you ' re running various aftermarket appliances in your 4WD , including additional charging points , a DC-DC charger will make the world of difference to your travels .

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The ProBoost can be mounted anywhere . Here , it is fitted inside a Mitsubishi ute ' s side canopy .

Why use a DC-DC charger ? At the end of the day , without one , you ’ ll never get your auxiliary battery charged to 100 per cent – about 70 or 80 per cent state of charge is the best you could hope for . That would make powering your portable fridge , spotlights , not to mention your various charging points , etc ., unrealistic .

One of the big advantages of the BMPRO ProBoost , however , is that both the 25 and 40A units contain a MPPT solar regulator . What does this mean ? Well , aside from charging your auxiliary battery off the 4WD ’ s alternator , it will take charge from an unregulated solar panel you happen to have mounted on the 4WD and put it into your auxiliary battery – it ’ s the most efficient system you could hope for .

While the 25A ProBoost has a maximum charging capacity of 500Ah , the 40A ProBoost can manage up to a massive 800Ah .