The DC battery charger/splitter obtains its energy from DC sources such as alternators, solar panels or wind power and optimises this power to meet the charging requirements of different battery banks.
Suitable for the most modern of vehicles with "Smart" alternators (regenerative braking) and older engines with conventional alternators too.
Battery to battery (DC to DC) split charge systems.
Our range of battery to battery chargers have a 3 stage micro-processor controlled charging system and use voltage sensing for automatic cut-in and drop-out battery split charging.
DC to DC battery split chargers are very simple to fit as these units only needs wiring from the starter battery to the leisure battery. No connection to the alternator is required.
Full, easy to follow fitting instructions for all our DC battery to battery chargers are included.
The difference between DC battery chargers and other split charge systems is that whereas a split charge relay is ruled by how the vehicle alternator senses the leisure battery charge the DC battery charger uses it's own micro-processor system to determine the actual level of charge in the leisure battery and tricks the alternator into providing extra charge for long periods in order that the leisure battery reaches full charge.
Confused? Let us explain further...
As stated previously a split charge relay is governed by what the vehicle alternator does. When the leisure battery voltage rises to a certain level (surface charge) the alternator will cut down it's charge rate to minimal amps because it thinks the battery is now charged; in most cases (i.e. light caravan and camping uses) where the leisure battery is not deeply discharged this would be acceptable. However, if the battery is deeply discharged the alternator will cut back too early because it cannot differentiate between what is just surface charge (i.e. the voltage has reached a level, but the battery actually needs much more charging) and what is full charge. This is where the DC battery charger comes in... Basically it reacts the same as a top quality mains battery charger, but instead of using mains electricity is uses power from the alternator instead and it will keep demanding that power until the leisure battery's actual full charge is reached.
So, to summarise, if you use a lot of leisure battery power and deep discharge the battery/batteries regularly then the DC battery charger should be your preferred option.
For all of the latest Euro 5 and Euro 6 engined vehicles (including Mercedes Blue Efficiency Sprinters, VW T5 and T6 Blue motion, Vauxhall Ecoflex and Ford Econetic Transits) we would recommend using a DC Battery to Battery charger. This is because the alternators on these vehicles will cut alternator power when not needed to save fuel then raise this voltage to very high levels when necessary for quick charging, which means a relay will not charge the leisure battery efficiently and could result in damage to both the relay and the battery.
DC Battery Split Chargers are suitable for the latest vehicles with regenerative braking systems.
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