Eneco and Vattenfall open Slufterdam 2.0 wind farm with twice as much power (WK-intern) - Eneco and Vattenfall will put a new, improved version of the Slufterdam wind farm into service today. The 17 existing wind turbines in the farm, which has been supplying renewable energy since 2002, have been replaced by 14 wind turbines that are much more efficient. As a result, the power has nearly doubled from 25.5 MW to 50.4 MW. The 14 wind turbines generate 180 GWh of electricity every year, enough to cover the annual consumption of around 60,000 households. The energy companies started preparations to replace the wind