Bud's Offshore Energy (BOE)

See the video below. The size and durability of the bladders could be issues at locations where there are other seafloor activities (e.g. trawling), but this and other pumped hydro-storage concepts are promising. Onshore testing of this concept is scheduled for 2023 in the Netherlands. Energy storage and stable, reliable power supply will be critical to the long-term success of offshore wind projects.