Victron energy BlueSolar MPPT 12-40 Anleitung Seite 8

4. Charge curve
4.1 Three step charging
The BlueSolar MPPT Charge Controller is configured for a three step
charging process: Bulk – Absorption - Float.
1) Bulk stage
During this stage the Controller delivers as much charge current as
possible to rapidly recharge the batteries. When the battery voltage
reaches the absorption voltage setting, the Controller activates the
next stage (absorption).
2) Absorption stage
During this stage, the Controller switches to the constant voltage
mode, where the absorption voltage is applied to the battery. When
the charge current decreases to the float transition current setting,
the battery is fully charged and the Controller switches to the float
stage.
3) Float stage
During this stage, the float voltage is applied to the battery to
maintain it in a fully charged state. When battery voltage drops
below the float setting a new bulk cycle will be triggered.
4.2 Equalization
Equalization charging is the process of deliberately charging a battery at
a high voltage for a set period of time. Equalize charging remixes the
electrolyte, helps to remove sulfate buildup on the battery plates, and
balances the charge of the individual cells. Equalizing the batteries every
month or two (depending on usage) prolongs the life of the batteries and
provides better battery performance.
Warning: Never apply equalize charge to VRLA (GEL or AGM) batteries.
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