Charging Algorithm; First Stage: Bulk; Second Stage: Absorption; Third Stage: Float - Dometic Go Power! GP-SB-PWM-10 User Manual

9. CHARGING ALGORITHM

The charge controller has a 4-stage battery charging algorithm for a rapid, efficient, and safe battery charging. These stages include:
Bulk, Absorption, Float, and Equalization.

9.1 FIRST STAGE: BULK

This algorithm uses 100% of available PV power to recharge the battery and provides the maximum current available based on max-
imum input current setting. In this stage the battery voltage has not yet reached constant voltage and the controller is delivering the
maximum available current to the batteries.

9.2 SECOND STAGE: ABSORPTION

When the battery reaches the constant voltage setpoint, the charger will start to operate in constant voltage charging mode, where
it is no longer providing the maximum available current to the battery. The current will drop gradually to maintain the setpoint.

9.3 THIRD STAGE: FLOAT

After the Absorption CV stage, the controller reduces the current even further so that the battery voltage can reach and be main-
tained at a lower float voltage set point.

9.4 FORTH STAGE: EQUALIZATION

Equalization is carried out every 30 days by default for flooded batteries or custom batteries if it is enabled. It is intentional over-
charging of the battery for a controlled time. Certain types of batteries benefit from periodic equalizing charge, which can stir the
electrolyte, balance battery voltage and complete chemical reaction. Equalizing charge increases the battery voltage, higher than
the standard complement voltage, which gasifies the battery electrolyte.
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