User's Manual

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 on-board DC loads.

Multistage Charging Process - GEL, AGM, Flooded & Program Modes

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 up to the 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 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.

Lithium Charging Process

The ePOWER DC2DC+ charger has a specic charging prole for Lithium batteries. It has its

own charging voltage and current settings that needs to be set by the user. It also requires

the user to set the charger termination current (“L“ setting). Once the user dened charge

voltage is reached, the charger will start reducing the current output and the charging process

will terminate when the charging current drops to the set termination current. This can take

anywhere between 3 to 15 minutes. The unit will then act as a power supply to support