Giggle C

Mr Huang argues that both of these approaches have weaknesses. By lifting the panels above the surface of the sea, SolarDuck's system could be a more expensive solution.

"If you lift it, you need some very strong support, so it's just going to cost too much money," he says.

SolarDuck challenges that claim.

"Delivering our technology at a competitive cost of energy is built into every step of the design process," says Koen Burgers, the chief executive of SolarDuck.