The first few kilometres of the NordLink high-voltage cable have been laid on the seabed in Vollesfjord in southern Norway.
Nordlink is one of the longest high-voltage direct current transmission interconnectors currently under development.
It will have a total length of 623km, of which 516km comprises subsea cables, and a capacity of 1.4GW.
The project partners are Tennet, German bank KfW, and Norwegian transmission system operator Statnett.
"Nordlink connects two perfectly complementary systems for the exchange of renewable energy," said Lex Hartman of Tennet.
"German wind and solar power on one side, and Norwegian hydropower on the other. Only projects such as Nordlink enable an integrated European energy market," he said.
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