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SERIES CHARGE CONTROLLERS – Connected between the charging source and the battery. Pulse width modulation (PWM), used in all modern charge controllers uses 3-stages of operation to give the most charging possible for the day.
BULK charge is the first stage, where the maximum power available from the charging source is fed to the battery until it reaches a preset voltage.
ABSORPTION is the second stage charge where the maximum battery voltage is held by reducing the charge current just enough to never exceed the target voltage.
