The tough news is that the current cost of both technologies has been revised upwards since the UK Carbon Trust last priced them in 2006.
Its latest study pegs tidal-stream energy at £0.29-0.33 ($0.46-0.52) per kWh and “far-shore” wave energy at £0.38-0.48.
But the Carbon Trust says both technologies can be cost-competitive with onshore wind and nuclear by 2025 — earlier than many previous estimates — and marine energy has much more potential for cost reduction than other renewables, given its immature state.
And,
