DolWin5 uses extra-high voltage direct current transmission technology. The three-phase alternating current (AC) generated by the offshore wind farm is converted into direct current (DC) at DolWin epsilon and transported south to Hamswehrum near the river Ems in East Frisia via a 100-kilometre-long subsea cable.

From Hamswehrum, a 30-kilometre-long onshore cable leads to the converter station in Emden/East where the DC is converted back into three-phase AC and fed into the extra-high voltage grid on land.