UPDATE 3-Vestas surprises with 7 MW offshore wind turbine
* Company launches 7 MW turbine, its biggest ever
* Company had been expected to unveil 6 MW turbine
* Says expects serial production to start in Q1 2015
* Vestas shares end up 2.6 pct (Adds details, quotes; updates share price to close)
By Shida Chayesteh
LONDON, March 30 (Reuters) - Danish wind turbine maker Vestas (VWS.CO: Quote) unveiled a new giant 7-megawatt offshore turbine on Wednesday and said it expected it to be in serial production in early 2015.
Vestas, the world's biggest wind turbine manufacturer by market share, had only been expected to unveil a 6 MW turbine, not the towering 135-metre (443 feet) 7 MW unit, with its rotor diameter of 164 metres.
The new turbine, whose rotor will trace a circle bigger than the London Eye ferris wheel and whose 80-metre blade is longer than nine London double-decker buses, is part of a push towards larger and larger units further offshore, where the wind power potential is high and public resistance can be avoided.
Shares in Vestas, already up before the announcement, rose as much as 3.5 percent and ended up 2.6 percent at 225.20 Danish crowns, outperforming a 1.7 percent rise in the Copenhagen bourse's bluechip index .OMXC20. Continued...