The 12-tonne device was lowered into 55 metres of water, 16 kilometres off the coast of Cornwall.
Wave-power machines can be connected to the £42m ($64.5m) hub for evaluation of their performance.
Wave Hub was lowered to the seabed on 3 September, following problems laying the project's power export cable last month.
Four 300-metre ‘tails’ which serve the berths of the hub were then positioned on the seabed by contractor CTC Marine.
The
