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'''HydroQuest''' is a French developer of vertical-axis tidal stream turbines.
A 1 MW turbine was tested at [[Paimpol–Bréhat tidal farm|Paimpol–Bréhat]] between April 2019 and December 2021. It comprised four vertical axis turbines on two shafts, each with three blades. The
=== LHD New Energy Corporation ===
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'''Marine Current Turbines''' (MCT) was a [[Bristol]]-based company that developed seabed mounted tidal-stream turbines. In June 2003, MCT installed the 300 kW Seaflow turbine in [[Lynmouth]], Devon.<ref name=":11">{{Cite report |url=https://www.osti.gov/etdeweb/servlets/purl/20714897 |title=Development installation and testing of a large-scale tidal current turbine |last=Thake |first=Jeremy |date=October 2005 |access-date=2023-12-21}}</ref> The larger 1.2 MW SeaGen turbine was installed in [[Strangford Lough]] in May 2008, and connected tot the Irish electricity grid in July. It was decommissioned in stages between May 2016 and July 2019, having exported 11.6 GWh of electricity.<ref name=":13">{{Cite web |date=2019-09-03 |title=Atlantis Successfully Decommissions 1.2 MW SeaGen Tidal System in Industry First {{!}} SIMEC Atlantis Energy |url=https://web.archive.org/web/20190903161227/https://simecatlantis.com/2019/07/26/meygen-operational-update-3-2/ |access-date=2023-12-22 |website=web.archive.org}}</ref>
=== Minesto ===
'''Minesto AB''' is a Swedish developer of [[Tidal stream generator#Tidal kite turbines|tidal kite turbines]], based in [[Gothenburg]].<ref>{{Cite web |title=Contact |url=https://minesto.com/contact/ |access-date=2024-01-01 |website=Minesto |language=en}}</ref> They also have a manufacturing base in [[Holyhead]], North Wales,<ref>{{Cite web |last= |date=2020-10-07 |title=Minesto’s Holyhead Assembly Hall is now fully operational |url=https://www.marineenergywales.co.uk/u-k-news/minestos-holyhead-assembly-hall-is-now-fully-operational/ |access-date=2024-01-01 |website=Marine Energy Wales |language=en-US}}</ref> and a test facility at [[Portaferry]], Northern Ireland. The company was formed in 2007 from the wind department of the [[Saab AB|Saab group]].<ref>{{Cite web |last=Genuth |first=Iddo |date=2013-11-19 |title=Deep Green - Underwater Kite Producing Electricity Tested in Northern Ireland |url=https://thefutureofthings.com/8404-deep-green-underwater-kite-producing-electricity-tested-northern-ireland/ |access-date=2024-01-01 |website=TFOT |language=en-US}}</ref>
A scaled-down version of the turbine was tested in [[Strangford Lough]], Northern Ireland in 2011. This turbine had a wingspan of {{Convert|10|ft|m}}, a 1:4 prototype of a turbine with 12 m wingspan and 1 m rotor diameter.<ref>{{Cite web |last=Genuth |first=Iddo |date=2013-11-19 |title=Deep Green - Underwater Kite Producing Electricity Tested in Northern Ireland |url=https://thefutureofthings.com/8404-deep-green-underwater-kite-producing-electricity-tested-northern-ireland/ |access-date=2024-01-01 |website=TFOT |language=en-US}}</ref><ref>{{Cite web |last=Edwards |first=Lin |last2=Phys.org |title=Deep Green underwater kite to generate electricity (w/ Video) |url=https://phys.org/news/2010-05-deep-green-underwater-kite-electricity.html |access-date=2024-01-01 |website=phys.org |language=en}}</ref>
In 2019, Minesto tested a 500 kW '''Deep Green DG500''' turbine in the Holyhead Deep, a channel off the coast of Holyhead.<ref>{{Cite web |date=15 August 2019 |title=Minesto flies Wales tidal kite |url=https://renews.biz/54809/minesto-flies-wales-tidal-kite/ |access-date=2024-01-01 |website=ReNEWS.biz}}</ref> The turbine was connected to a buoy which analysed the power produced, but it was not connected to the GB Grid.<ref>{{Cite web |last=Harris |first=Michael |date=2018-06-05 |title=Minesto's Holyhead Deep tidal generating site ready to begin production |url=https://www.hydroreview.com/world-regions/europe/minesto-s-holyhead-deep-tidal-generating-site-ready-to-begin-production/ |access-date=2024-01-01 |website=Hydro Review |language=en-US}}</ref> The Holyhead Deep is within the West Anglesey Demonstration Zone, now part of the [[Morlais]] project.
Two 100 kW '''Dragon 4''' turbines were installed at [[Vestmanna|Vestmannasund]] in the Faroe Islands in 2022, supplying electricity to the local grid via [[SEV (company)|SEV]].<ref>{{Cite web |last=Garanovic |first=Amir |date=2022-09-07 |title=Minesto starts commissioning second ‘Dragon 4’ tidal power plant |url=https://www.offshore-energy.biz/minesto-starts-commissioning-second-dragon-4-tidal-power-plant/ |access-date=2024-01-01 |website=Offshore Energy |language=en-US}}</ref> In November 2023, Minesto shipped a '''1.2 MW Dragon 12''' turbine manufactured and tested in Sweden to the Faroes.<ref>{{Cite web |last=Garanovic |first=Amir |date=2023-11-09 |title=Minesto’s 1.2MW tidal energy device on its way to Faroe Islands |url=https://www.offshore-energy.biz/minestos-1-2mw-tidal-device-on-its-way-to-faroe-islands/ |access-date=2024-01-01 |website=Offshore Energy |language=en-US}}</ref> The company have plans to build four arrays of 20–40 MW, totaling 120 MW in the Faroe Islands, reportedly supplying 40% of the islands electricity demand.<ref>{{Cite web |last=Garanovic |first=Amir |date=2022-04-13 |title=Minesto outlines tidal array build-out plan to bolster energy transition of the Faroe Islands |url=https://www.offshore-energy.biz/minesto-outlines-tidal-array-build-out-plan-to-bolster-energy-transition-of-the-faroe-islands/ |access-date=2024-01-01 |website=Offshore Energy |language=en-US}}</ref>
=== Nova Innovation ===
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