New capacity more than doubled in 2015 due backlog; existing projects to bring more expansion in coming years. Growth in new offshore wind capacity in Europe is to slow this year after more than doubling in 2015, an industry report said on Tuesday. "New capacity additions will be lower in 2016 than 2015 though should then rebound, and we can expect to have (an installed total) over 20 GW (20,000 MW) offshore wind by 2020," said the chief executive officer of the European Wind Energy Association (EWEA), Giles Dickson. The report for 2015 showed that new capacity linked to onshore grids totalled 3,019 megawatts (MW) last year after 1,483 MW in 2014. This was mostly due to a strong backlog of network connections in Germany in that particular year, EWEA said.