In the United Kingdom, the study from Ernst & Young estimates connection costs for offshore plants in a range of GBP 300-800/kW, depending on the distance from the shore, the present study adopts an intermediate value of GBP 500/kW, which corresponds to about 20% of the investment costs at the plant level. Connection costs for offshore have been estimated to lie between 10% and 25% of investment cost, depending on the distance from the shore (Green Net, 2009a). For the other countries, the average value of 17.5% was used.