ePOWER Battery Charger Manual

Multistage Charging Process for Lead Acid Batteries
The 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.
These Battery Chargers feature multistage smart charging technology that enables the charger to be
connected to your battery banks permanently.
The Battery Charger utilise high frequency power switching circuits to convert the normal mains 240 volts
AC (via either shore or generator power), to the required low voltage DC required to charge the batteries.
As dictated by battery manufacturer’s recommendations, deep cycle batteries require a multistage charge
sequence for perfect, fast and accurate charging. Enerdrive multistage smart chargers delivers four
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 its 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.
Stage 4 - Maintenance stage is a regular timed recharge (or return to bulk stage). The Enerdrive Battery
Charger switches the charger from oat to boost after 7 days of constant operation to ensure the battery
banks remain active.
Page 12 Enerdrive Battery Charger Owners Manual Rev. 5.4