It's great......when the wind blows. In the UK we have about 15GW of installed wind generating capacity, but it's very rarely fully utilized. The variability means it's balanced out by other sources mostly gas powered Combined cycle turbines. During summer there have been weeks where wind and solar were negligible and gas was providing nearly 60% of the electricity generated. Nuclear is reliable, but we only have about 5GW of capacity, we can import another 6GW from Europe and other sources such as biomass and hydro are about 3GW. There's higher wind capacity utilisation in Winter but there are still days when it's very still and we have to rely on fossil fuels. French nuclear and British gas turbines help to balance out demand across Europe when the winds are still, but it's variability is a real issue. Would more installed capacity help?