4. UNDERSTANDING THE UNIT
The Enerdrive ePOWER DC2DC Battery Charger is a fully automatic multistage, multi input
battery charger with the ability to charge from either an alternator linked to a battery; or via
solar power with the in built Maximum Power Point Tracking (MPPT) Solar Controller. With two
inputs available, the house battery will be charged from either the engine while underway,
or via the solar panels when stationary. The process to choose either engine or solar is fully
automatic and both functions are controlled from within the unit itself without the need for
external relays.
During normal operation the ePOWER DC2DC Battery Charger will do a full charge cycle to
oat stage on the house battery bank with ability to choose either GEL, AGM, Flooded, Custom
Programmable or Lithium. Once oat stage is reached the charger transitions to a power supply
mode to support any on-board DC loads.
Multistage Charging Process
The ePOWER DC2DC Battery Charger is a fully automatic, set and forget charger. It is designed
to quickly and accurately recharge your deep cycle batteries utilising charger algorithms that
help to maximise the life of your specialised deep cycle batteries.
The ePOWER DC2DC Battery Charger features multistage smart charging technology that
enables the charger to be connected to your battery banks permanently. With the input of
multiple sources, you can be assured of charging your batteries whenever underway; or when
the sun is shining on your solar array.
As dictated by battery manufacturer’s recommendations, deep cycle batteries require a
multistage charge sequence for perfect, fast and accurate charging. The Enerdrive ePOWER
DC2DC smart charger delivers three primary charge stages.
Stage 1 – Bulk or Boost charge; The battery is charged at full rated output current of the
charger until the battery reaches its nal charging voltage, known as its absorption voltage.
In this step, around 80% of the battery is recovered as fast as possible.
Stage 2 – Absorption Charge; With the charger voltage held steady, the remaining 20% is
replaced with the charger allowing the current to taper o as the battery approaches full charge.
Stage 3 – Float; Finally, in the oat stage the charger voltage is lowered and held at a constant
and safe predetermined level. This prevents the battery from being overcharged, yet allows
the charger to supply enough current to make up for the self-discharge losses of the battery,
while supporting any additional loads connected to the battery (such as DC lighting and
refrigerators). This stage allows for the charger to be used as a DC power supply.
Smart Charging Feature
The ePOWER DC2DC Battery Charger will regulate its output based on the loads connected
to your battery banks. This function is important to maintain the life of your battery banks as
some battery chargers mistake loads for discharge and continue to keep the batteries in the
bulk or absorption stage for extended periods of time, which will damage the battery bank.
The ePOWER DC2DC Battery Charger has two methods of load based regulation to ensure
your battery charger transitions to oat when it should do so.
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