Source: NRK Sørlandet (in Norwegian).
Lately, the price of electricity here on the south coast has increased markedly, after a subsea cable connected the south coast of Norway to the Netherlands, where electricity is far more expensive. The cable has a capacity equivalent to 5% of the total Norwegian consumption. (This is of course a much higher proportion of the local market, and new technology makes it possible to transmit the electricity with much less loss than in traditional power lines.) Norway already has two similar cables, at least one of which is to Denmark.
Source: NRK Sørlandet (in Norwegian again).