Wave-power ships could provide cheaper clean electricity

New Scientist : Ships that harvest energy from the waves and store it in batteries could one day generate electricity from the world’s oceans more cheaply than today’s wave-power devices, writes Helen Knight for New Scientist. The ships would sail to a suitable location, drop anchor, and start generating electricity from wave energy. Once their batteries were fully charged, they would return to shore and feed the electricity into a grid. Unlike conventional wave-power devices, the ships would not need undersea cables to link to the electricity grid, which would cut a significant fraction of the overall cost.