From Flekkefjord a 570-kilometre (350 mi) long high voltage direct current submarine cable will run through the North Sea to Mooriem in Lower Saxony, Germany.
This way, the disadvantages of a ground-return electrode with earthing in the sea, such as production of chlorine compounds and metal corrosion, are avoided.
Since the power supply in both Germany and Norway is based on alternating current, converter stations must be built in both countries.
Previous investigations show that underwater HVDC cables have no known impact on sea life.
[6] In periods of overproduction, German wind power can be transported to Norway while water in Norwegian reservoirs can be stored for later use.