What does a float charger monitor?

A float charger primarily monitors the voltage of the battery it is connected to. Its main function is to maintain the battery at its full charge without overcharging. The float charging process involves keeping the voltage at a specific level that is slightly above the battery's resting voltage, allowing the battery to stay charged while preventing damage from excessive charging.

By continually monitoring the voltage, the float charger can adjust its output as necessary to maintain this optimal voltage level. This is crucial for lead-acid batteries, widely used in various applications, as it helps extend their life and efficiency. While current, power, and temperature are important factors in battery management and charging, in the context of a float charger, voltage monitoring is the primary focus and critical for its function.