Innovative charger with high power density and efficiency. The microprocessor-controlled charger features a programmable 3-stage charging and charging curve, as well as an active PFC function for gentle and safe charging of your batteries. Through the PM-Bus interface, the charging curve of the battery charger can be precisely adjusted to the battery used. Additionally, it is possible to adjust the output current and voltage. The powerful and efficient device also has a universal AC input and an I2C interface. Furthermore, the charger can be integrated into a rack system and perfectly adapted for charging, backup, or constant current applications. Numerous safety mechanisms, a wide input range, and a high temperature range enable a variety of applications. The charger also offers high stability and a good cost-benefit ratio. Common areas of use include DC UPS, emergency power supply, feedback systems, battery chargers for boats, vehicle charging stations, wastewater treatment systems, electrolysis systems, and many other applications.