Norwegian hydro-electric site

The suspicion has to be that Britain's 'excess' wind power, if any, would sell for a low price as Norway doesn't need it, whereas a shortage of power in Britain would allow Norway to sell for a high price, assuming availability at request time. Water can be stored but wind can't. Some reports are calling this 'cheap hydro', but at £1.4 billion just for the cable system such claims appear unconvincing.
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Norwegian reservoirs will begin powering homes in Great Britain today as the world's longest subsea power cable was switched on, in a boost to renewables and tight energy supplies this winter, says New Scientist.

The 724-kilometre North Sea Link is the sixth of a growing network of electricity interconnectors between Great Britain and its European neighbours, to trade energy and adapt to grids increasingly reliant on the variable output of wind, solar and hydro.

First tested in June, the copper cable along the seabed of the North Sea will operate at half its potential for three months before reaching its 1400 megawatt capacity, enough to power 1.4 million homes.

Power is expected to initially mostly flow from Norway, which generates almost all its electricity from hydro, to Great Britain, where electricity prices are higher.

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