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Enerdrive ePRO Inverter / Charger Owners Manual
In the Bulk stage, the charger delivers full output current and typically
returns approximately 80% of charge back into the battery once the
absorption voltage is reached. During this stage, the battery empty
and battery 50% full indicators will be lit depending on the Bulk
charge progress. When the absorption voltage has been reached, the
Absorption stage will be entered and the battery 80% full indicator
will be lit. This stage will return the
fi
nal 20% of charge to the battery.
The output voltage is kept at a constant level and the charge current
decreases as a function of the battery’s state of charge. When the charge
current has dropped below a certain value or when the maximum
absorption timer has been expired, the Float stage will be entered. The
battery full Indicator will be lit and an acoustical message will sound,
indicating that the battery is full. In this stage the battery voltage will be
held constant at a safe level for the battery. It will maintain the battery
in optimal condition for as long as the battery remains connected to
the activated charger. Connected battery loads will be directly powered
by the charger up to the charger’s maximum output current level.
When even more current is drawn, the battery must supply this which
results in a declining battery voltage. At a certain battery voltage level,
the charger jumps back to the Bulk stage and will
fi
nalize a complete
charging process again, once the battery load consumption has
dropped below the charger’s maximum output current level.
The fourth stage called “Pulse”, will perform a short refresh charge of
approximately 1 hour each 7 days while the charger operates in the Float
stage. This will keep the battery in optimal condition while prolonging
it’s lifetime. The battery can remain connected to the activated charger
continuously, without risk of overcharging.
When the battery temperature sensor is installed, the charger
automatically compensates the charge voltages against battery
temperature. This means that the charge voltages are slightly increased
at lower temperatures and decreased at higher temperatures (-30mV/°C