A big congratulations to everyone involved at RWE and Jan De Nul successfully completed the monopile installation scope at the Thor Offshore Wind Farm. In just around 150 days, all 72 monopiles were installed using Les Alizés — a major milestone for Denmark’s largest offshore wind farm. Our AIS based analysis of installation scope gives you the full insight here.
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Monopile Campaign
Les Alizés completed the monopile campaign with an average installation time of 2.2 days per position. This is almost identical to the industry median of 2.3 days for similar projects. Importantly, this was the vessel’s first monopile campaign using its new pile gripper. The results show that Les Alizés can perform on par with leading industry standards. However, longer transits and weather-related delays slightly extended the total campaign duration. Despite this, the vessel achieved strong operational efficiency. The “Other” category mainly reflects site positioning and sheltering activities during adverse conditions.
Secondary Steel Campaign
The secondary steel installation was carried out by MPI Adventure. This reflects a growing industry trend: separating monopile and transition piece or secondary steel installation. By doing so, developers can avoid delays in monopile operations and allow lighter installation tasks to progress in parallel. The campaign moved forward at a comparable pace to the monopile scope, averaging 2.3 days per position, including 1.3 days on site.
