Epever Tracer-AN Series, User Manual

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6
A) Bulk Charging
In this stage, the battery voltage has not yet reached constant voltage
(Equalize or Boost Voltage), the controller operates in constant current mode,
delivering its maximum current to the batteries (MPPT Charging).
B) Constant Charging
When the battery voltage reaches the constant voltage setpoint, the controller
will start to operate in constant charging mode, this process is no longer MPPT
charging, and in the meantime the charging current will drop gradually, the
process is not the MPPT charging. The Constant Charging has 2 stages,
equalize and boost. These two stages are not carried out constantly in a full
charge process to avoid too much gas precipitation or overheating of battery.

Boost Charging
The Boost stage maintain 2 hours in default, user can adjust the constant time
and preset value of boost voltage according to demand.
The stage is used to prevent heating and excessive battery gassing.

Equalize Charging
WARNING: Explosive Risk!
Equalizing flooded battery would produce explosive gases, so well
ventilation of battery box is recommended.
CAUTION: Equipment damage!
Equalization may increase battery voltage high enough so as to
damage sensitive DC loads. Verify that all load allowable input
voltages are 11% greater than the equalizing charging set point
voltage.
CAUTION: Equipment damage!
Over-charging and excessive gas precipitation may damage the
battery plates and activate material shedding on them. Too high an
equalizing charge or for too long may cause damage. Please carefully
review the specific requirements of the battery used in the system.
Some types of batteries benefit from equalizing charge on a regular basis,
which is able to stir electrolyte, balance battery voltage and accomplish
chemical reaction. Equalizing charge increases battery voltage, higher than
the standard complement voltage, which gasifies the battery electrolyte.
The controller will equalize the battery on the 28th each month. The constant
equalization period is 0~180 minutes. If the equalization isn‟t accomplished in
one-time, the equalization recharge time will be accumulated until the set time
is finished. Equalize charge and boost charge are not carried out constantly in
a full charge process to avoid too much gas precipitation or overheating of