3d visuelisering av floating windpark av Flexifloat

Floating storage of wind and wave energy producers

We customize and optimize floating foundation of wind turbines and wave energy transformers in marine areas.

Floating windpark

FlexiFloat Substructure overall dimensions:

  • 420 x 240 x 54m (37m above sea level)

  • Substructure weight: 9800 tons

  • Water depths: 30 – 800m

  • Mooring: 10 anchor and 24 mooring lines

Prototype wind turbine and wave energy installation

  • 40 MW installed wind turbine capacity
  • 30 MW installed wave energy capacity


  • Complete installation close to fabrication yard inshore.
  • Low cost on production, towing, installation, operation and maintenance (Low LCoE)
  • Excellent stability in High Waves and Heavy Wind.
  • Extended height above sea and stability improve turbine efficiency and lifetime
  • Area-efficient installation
  • Option to install helideck and transformation module on substructure.
  • Feasibility for extension of windfarm.
  • Years of development 2016 -2021
    Years of production and demonstration 2022 -2025
    Years of operation 25
    Number of wind turbines 9
    Number of wave energy generator modules 3
    Total installed capacity 70 MW
    Production 25year x 8760hrs/year x 70MW x *0.49 7,51 millions MWh
    CAPEX (inshore) **118 millions EUR/ 7,51 millions MWh 15,7 EUR/MWh
    CAPEX (offshore)***35 millions EUR/ 7,51 millions MWh 4,7 EUR/MWh
    OPEX (O&M) ****75 millions EUR/ 7,51 millions MWh 10,0 EUR/MWh
    Contingency 20% 6,1 EUR/MW
    LCoE(LevelisedCost of Energy, incl 20% contingency) 36,5 EUR/MWh

*49% load factor (4290 annual hours of maximum load) **complete inshore installation ready for sail away. ***towing offshore, mooring, grid and commissioning. ****operation and maintainance in 25years lifetime.


Our Solution

Flexifloat is a slim, modularised and elastic floating platform for combined wind and wave energy production. A unique concept with remarkable low construction and service cost.

The Team

Einar Flexifloat



Terje Flexifloat






Ivar Flexifloat

Rosenberg WP