BESPOKE SYSTEM FOR GRID CONNECTION

We help our customers to connect floating green energy to the electricity grid on land.

SubConnected offers innovative, proven and cost-efficient solutions, with long life and low maintenance. Marine Operations are faster and less expensive.

SubConnected offers components, systems and can also act as a system integrator offering a complete solution including deployment and connection.

Bespoke systems for:

In-shore floating solar (FPV) park
Off-shore floating- solar, wind and wave power

NEWS

Press release 03 November 2025:

The FOREST project (Future Ocean Renewable Energy System Technologies) has officially launched with support from the European Commission under the Horizon Europe Programme. With a budget of €4 million, the project brings together eight partners from the UK, Portugal, Spain and Sweden to drive advancements in subsea components and digital technologies that will set new global standards for durability, reliability and efficiency in ocean energy systems.

Coordinated by the European Marine Energy Centre (EMEC) based in Orkney, Scotland, the three-year project aims to enhance the performance of ocean energy arrays, reduce the levelised cost of energy (LCOE), foster sustainability of ocean energy systems, and accelerate market readiness. FOREST will also generate and share knowledge on how to operate ocean energy farms, improving their availability, maintainability, reliability, survivability and sustainability.

The project will deliver three major innovations:
-33 kV super dynamic cables and connection hub for ocean energy arrays, designed by SubConnected;
-A subsea cable quick connector system to streamline deployment and maintenance, developed by Apollo; and
-A cutting-edge optical measurement platform by Indeximate incorporating artificial intelligence and machine learning from CENER and Intelligent Plant to measure cable and device health and optimise array performance.

These innovations will be rigorously tested at EMEC’s world-renowned wave and tidal test sites in Orkney, Scotland, working in collaboration with wave and tidal energy developer companies. Bureau Veritas will ensure compliance with the highest international certification standards. The consortium includes: EMEC (Coordinator), Indeximate, Intelligent Plant, Bureau Veritas and Apollo (UK); WavEC Offshore Renewables (Portugal); CENER – National Renewable Energy Centre (Spain); SubConnected (Sweden).

Peter Child, FOREST Project Manager for SubConnected AB said “SubConnected is delighted to be chosen to play a key role in this major project. Using the knowledge and experience SubConnected and our long term partners have built up over the last decade SubConnected will design and build the inter array cable system for this project. Using super dynamic electric marine cables upgraded to 33 kV with a spar hub buoy, the system can handle the movements experienced in Floating ocean energy devices including wind, wave, tidal and solar. Sub Connected is a system integrator and with our partners provide a complete turn-key installation from concept to hand-over and support including marine operations and deployment.This is the second major HORIZON project SubConnected has been selected to work on this year. The second is a project to engineer a 66 kV inter array cable system for Floating Offshore wind which started in October 2025Together these two projects show SubConnected is a leading company in Floating Offshore Energy projects.”

For more information contact: Peter Child – peter.child@subconnected.com (SubConnected Forest Project Manager) | Stefan Krusell – Stefan.Krusell@subconnected.com (SubConnected Verti Go Project Manager)

Press release 14 October 2025:
Sub Connected AB partition in Verti-Go consortium secures €15M from Horizon Europe

The 15 million Euro funding call by Horizon Europe is now secured by SeaTwirl AB and the
consortium behind the project application “Verti-Go”. The Verti-Go project will demonstrate
SeaTwirl’s floating wind turbine technology with a 2MW turbine including the design, fabrication,
installation and operation together with Sub Connected patented design for grid connection at sea.
The design phase is estimated to conclude around the end of 2026, followed by the construction
and operations phase that is planned to last until end of 2029.

On May 22nd it was announced that SeaTwirl’s project Verti-Go has been selected as the successful applicant for funding under the EU program “Demonstrations of innovative floating wind concepts” and was thereby invited by Horizon Europe into the grant preparation stage of the funding call of 15 million Euro. The grant preparation phase was successfully finalized with the signing of the grant and consortium agreements, and the project will start as planned on October 1st, 2025.

The Verti-Go project is led by Technical Coordinator SeaTwirl and the Project Coordinator University College Cork. The project consortium includes: EDP – Cnet Centre for New Energy Technologies SA, Greenov, Next Fabrication, Sub Connected AB, Sowento, RSTER, PNO, Bureau Veritas, and Zorlu Enerji. The project advisory board includes DNV.

” We are very proud of this achievement, and what the Verti-Go team has accomplished pulling this together. This is an exceptional milestone for Sub Connected, and I am excited about working with all partners”, says Ulf Lindelöf, CEO of Sub Connected AB.

SUB CONNECTED AND OUR PARTNERS

The experienced team in SubConnected have skills in marine high voltage electrical systems, sea cables, marine connections, monitoring system and green energy. We have senior international experience from wave power, cables, engineering and digitalization.

SubConnected have long term relationship with its partners and have selected them carefully. We can together provide the edge in know-how, development resources, technology and production capability to deliver solutions to our customers.

OFFSHORE

SubConnected offer bespoke systems for floating- solar and wind, a wave power parks.

The design is using a new generation of lightweight sea cables with a built in super dynamic flexibility and strength and a unique patented spar hub for connecting multiple cables with dry connection points and preventing the cables from scuffing. The system has been tested for 7 years in extreme conditions off Runde in Norway. The cables have undergone extreme longevity testing at RISE (Research Institute of Sweden) and Chalmers University of Technology have done numerous simulations on longevity and performance.

SubConnected offers an innovative, proven and extremely cost-efficient cables and spar hub systems, fully installed with long life and low maintenance. Marine Operations are faster and less expensive.

IN SHORE

SubConnected have developed an innovative patented solution with a floating submerged transformer with an Seaflex mooring solution.

For inshore solar parks on lakes and dams it’s important to ensure that the energy losses in the complete system are minimal. For this reason, the transformation to AC and higher voltage must take place close to the energy generation.

The SubConnected spar buoy is placed close to the energy generation and the transformer is submerged into the water which results in stable and optimal cooling, significantly reducing energy losses. The hub solution is easy to transport and deploy with substantially reduced wind and wave resistance. Due to this reduction the mooring system can be designed without the need to handle the larger loads.

OUR STORY

Sub Connected was formed by a team originating from Waves4Power, a swedish company developing a system that produce energy from ocean waves. A key challenge for ocean energy solutions is to find a way to transport electricity from ship to shore that survives and are reliable. The founders of SubConnected have experience from 10 years of wave power development.

To rule the waves

Marine devices in open sea are a challenge. Wind and waves will do it’s best to destroy any man-made device. Waves as high as 15-20 m are not unusual. It’s not only the device itself, but also the mooring, and in the case of wind power and the cable system that must survive and remain functional in the worst possible weather situation. Even huge construction such as tankers are vulnerable and can be destroyed in a bad storm. The experience from mooring wind and wave power devices under those circumstances limited. The experience to electrify devices like this environment is unheard off.

In the land of the blind, a man with one eye is king

Waves4Power is a wave power company that deployed a full-size wave power system outside the Norwegian west coast 2017. In parallell with the development of the wave power device, the job started to develop a system that could carry the electricity from the wave power device to shore. The type of cables needed with flexibility and strength to survive in the worst possible environment did not exist.

A completely new generation of sea cables with a built in super dynamic flexibility and strength given by Kevlar ropes integrated in the cables was developed and patented by our cable partner NKT Cables. A cable by itself was not enough, we also needed a hub for connecting multiple cables and ensure dry connection points as well as protect the cables from scuffing towards the bottom.

The system has been tested during six years in the worst possible conditions outside Runde Environmental Center in Norway. The cables have also undergone extreme longevity testing at RISE (research Institute of Sweden) and Chalmers University of Technology had done numerous simulations to simulate longevity and performance. Altogether this is the best tested cable by NKT Cables ever.

With this type off cable and the hub concept SubConnected can offer customers an innovative, well proven, and cost-efficient cable system with long life and low maintenance. A system that can be an alternative to traditional steek armored cables.To keep the cables flexible, we operate with lower voltage to keep conductors and insulation as slim as possible. This makes marine operation considerably less expensive. SubConnected prefers to utilize the hubs as connection point before going to shore, alternatively have a central platform to collect cables from multiple wind/wave power devices before going to shore.

THE TEAM

Dear visitor feel free to contact us at:

Jan Melsom, Market Norway:
jan.melsom@subconnected.com
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Peter Child, Market UK:
peter.child56@yahoo.com

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Stefan Krusell, CSO:
stefan.krusell@subconnected.com
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Ulf Lindelöf, CEO:
ulf.lindelof@subconnected.com
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Emil Christiansen, Business Development:
emil.christiansen@subconnected.com
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Christian Plyhm, CFO:
christian.plyhm@connectbus.se
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LOCATION

We have market representation in Sweden, Norway and UK. Our head office is located close to the city of Göteborg, Sweden.

Address in Sweden:
SubConnected AB
Snöhöjdsstigen 16
431 38 Mölndal
Sweden

GALLERY