High Voltage Service

When you take on ALL NRG as your HV Service Partner you get the most experienced High Voltage partner in the wind industry. We are responsible for the grid connection – and often the ongoing service of the high voltage installation – of more than 2,000 offshore wind turbines all over the world, corresponding to more than 90% of the largest offshore wind turbine farms.

Currently, we maintain and service nearly 500 wind turbines in Europe according to detailed service agreements, and we operate as approved production managers on more than 250 wind turbines in Denmark.

Planned Service

Having your HV system maintained regularly saves cost. Setting up a maintenance plan for your HV system minimize the risk of unplanned breakdown of vital components in the WTG. Therefore, a planned shutdown is and will always be the cheapest and best solution compared to a breakdown.

Breakdown service

ALL NRG provide Breakdown service to ensure a minimum downtime for your WTG, and our dedicated breakdown teams are ready to solve any HV or MV failure in your turbine. Our technicians are the most well trained HV WTG technicians in the industry, and are constantly upgraded in courses and training.

No.1 High Voltage Service Partner

Our extensive engagement in the installation and commissioning of WTG’s means that previously we most likely have already worked on the exact same turbine. This gives us the edge when it comes to turbine knowhow and the logistics involved.

ALL NRG is Service Partner for leading manufacturers of HV components and we hold a large number of spare parts to ensure a fast and trouble-free service.

When serviced by ALL NRG, either Planned or during Breakdown, we guarantee a 100% focus on the given project.


  • World leading HV competences
  • Extensive knowhow due to massive track record and continuous training
  • Flexibility and understanding of customer needs
  • Highest quality standards in the sector
  • One point of contact for your particular project
  • We are preferred supplier to some of the largest wind farm operators and OEM’s in the industry
Lars Rasmussen

Lars Rasmussen

Senior Sales Manager, High Voltage

Send e-mail

+45 7010 1022

+45 4091 7659

Esben Rocatis Nielsen

Esben Rocatis Nielsen

Director, HV Service & Solutions

Send e-mail

+45 7010 1022

+45 4034 9774