Floating Solar Islands
Source: youtu.beSolar Islands -- a concept by CSEM, Switzerland.
...costing $5M and about 100 meters wide with a peak power generation of roughly 1 megawatt. The plant will produce energy by concentrating solar power onto pipes containing water. The water will boil, and be used to spin turbines. Once shipped off-shore, the islands could be used to convert seawater to hydrogen, allowing them to be autonomous and untethered to the shore. They hydrogen could be picked up by barges, instead of having to transport the electricity to shore via a physical connection.Source: EcoGeek.org