A hybrid actuator determines the current operating state and subsequently optimizes the charging process using the principle of pulse width modulation. Therefore PWM charge controllers are much more effective than simple linear charge controllers. The built-in microprocessor charges the battery gently, thus guaranteeing a long life for your solar batteries. The state of charge as well as the charging via the solar module can be recognized by the LEDs. The built-in undervoltage protection prevents excessive discharge of the battery. Overcharging of the batteries is thus prevented, as the charge controller terminates the charging process when full capacity is reached.