Wales' largest wind farm Pen-y-Cymoedd drone footage
Wales' largest onshore wind farm has generated electricity for the first time.
The £365m Pen-y-Cymoedd farm is being built between Neath and Aberdare by Swedish developers Vattenfall.
The company said the breakthrough was "one of the biggest boosts this decade to delivering Wales' green energy targets".
The 250 megawatt, 76-turbine scheme is set for completion early in 2017.
Drone footage from Vattenfall shows the farm in action.