The cable cannot be operated at the maximum transmission rating of 600 megawatts, because the 380 kV line which begins at the converter station of Lübeck-Herrenwyk ends at the Lübeck-Siems substation. This is the only 380 kV powerline in Germany, which has no direct connection to the Central European 380 kV grid, which caused the Baltic Cable to have a 372 megawatt (MW) capacity instead of 600 MW. This bottleneck was solved in 2004 when an additional 220 kV line was built. However power flows on 220 kV and 110 kV lines face increased losses of the transmission.