August 27, 2018
Anniversary for a pioneer: BARD Offshore 1, Germany’s most productive offshore wind farm, has been in operation for five years

Bard Offshore 1

BO1, the first and 2017 most productive offshore wind farm in Germany is completely connected to the grid since September 2013.
80 wind energy generators of the 5 megawatt class reach a nominal capacity of 400 mega watt - this equals the energy consumption of more than 400,000 households.

BARD Offshore 1 was supported by the European Commission within the scope of the European Energy Programme for Recovery (EEPR).


Ideal location in the German North Sea

The offshore wind farm BO1 is located approx. 100 km north of the isle of Borkum in the German North Sea and comprises an area of approx. 59 square kilometres.


At a glance


Location: 90 kilometre north of the isle of Borkum

Area: 59.2 square kilometre

Water depth: up to 40 metre

Turbines: 80 BARD 5.0 wind energy converter of the 5 megawatt-Class

Foundation: Tripiles

Rotor diametre: 122 metre

Hub height: 90 metre

Total height: 152 metre

Total power: 400 megawatt

Production: 1.6 billion kWh per year (supply of approx. 500,000 households with green energy)

Start of construction: April 2010

First power input: Dezember 2010

Commissioning: September 2013

Total investment: more than 1 billion Euros


Turbine technology
BARD 5.0


The tripile technology is especially engineered for far offshore installation.



Advantages of the tripile foundation over tripod, mono pile or jack-constructions are:


Technology converter platform
BARD 1 – HVDC Platform Borwin Alpha

Farm external grid connection:

Farm internal grid connection:

Converter platform BARD 1:


Our environmental monitoring


In the context of the approval process of a wind farm in the German exclusive economic zone the potential issues affecting the sea environment have to be examined. Furthermore it is required by law to execute an environmental impact assessment. To fullfill theses two obligations a so called Environmental Monitoring is installed. Method and range are determined by the permit authority, the Bundesamt für Seeschifffahrt und Hydrographie (BSH).

All phases of a project's lifecycle (planning, construction, operation, decommissioning) are included within the Environmental Monitoring and ranges each within different time frames. In the planning phase data of a minimun of two years needs to be included, in the operating phase a minimum of three years. This periods can be extented by the permit authority BSH up to a maximum of five years.

Subject of protection, to be examined in the monitoring, are benthos, fish, avifauna, bats and maritime mammals. Due to the long time periods and big efforts costs for environmental monotoring are quite high, several million Euros.


Noise protection for the North Sea


For erection of the offshore wind energy generator it is necessary to fasten its foundations in a water depth of up to 40 metres. This is performed by driving the piles between 30 and 40 metres into the seabed. During the pile driving noise emissions of approx. 175 dB occur in approx. 750 metres distance. As this maritime underwater noise can damage maritime creatures, the usage of noise protection actions are obligatory.

In 2011 the so called Offshore Test 1 (OFT 1) was performed within the wind farm BARD Offshore 1 and a novel noice protection system was tested. A Small Bubble Curtain (SBC) was used, which produces small bubbles for noice protection during pile driving next to the piling pipe. It has turned out that noice emissions have been clearly reduced by using the SBC.