The new Elfa3 devices are bus converters which can be combined with various drives and are compatible with both hybrid and purely electric buses. Furthermore, they are suitable for modular use in vehicles from 9 to 24 metres in length. Elfa3 regulates the power output and in the same way controls energy recovery. With the protection class IP6K9K, the converters are designed to be suitable for demanding environments in the utility vehicle domain. They combine innovative, extremely compact construction with high-power density.