Epever ET4415BND User Manual page 12

ATTENTION: Dégât sur l'équipement!
Un chargement excessif et une pré cipitation de gaz peut
endommager les plaques de la batterie et la formation de matières
actives dessus. Un chargement trop fort ou une égalisation prolongée
peut causer des dégâts. Inspectez soigneusement les conditions
spé cifiques de la batterie utilisée dans le système.
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
battery.
NOTE: 1) Due to the influence of ambient circumstance or load working,
the battery voltage can't be steady in constant voltage, controller will
accumulate and calculate the time of constant voltage working. When the
accumulated time reach to 3 hours, the charging mode will turn to Float
Charging.
2) If the controller time is not adjusted, the controller will equalize charge
battery once every month following the inner time.
C) Float Charging
After the Constant voltage stage, the controller will reduce charging current to
Float Voltage set point. This stage will have no more chemical reactions and all
the charge current transforms into heat and gas at this time. Then the
controller reduces the voltage to the floating stage, charging with a smaller
voltage and current. It will reduce the temperature of the battery and prevent
the gassing and charging the battery slightly at the same time. The purpose of
Float stage is to offset the power consumption caused by self consumption and
small loads in the whole system, while maintaining full battery storage
capacity.
In Float charging stage, loads are able to obtain almost all power from solar
panel. If loads exceed the power, the controller will no longer be able to
maintain battery voltage in Float charging stage. If the battery voltage remains
below the Recharge Voltage, the system will leave Float charging stage and
return to Bulk charging stage.
8