Zeevonk combines multiple technologies into one integrated offshore energy system. It connects offshore wind directly to electrolysis for hydrogen production and adds floating solar within the same area. This approach improves the use of infrastructure and reduces reliance on the electricity grid. Instead of only supplying electricity to shore, part of the energy is converted into hydrogen for industrial use and energy storage.

The offshore wind farm has a total capacity of around 2 GW. With typical North Sea capacity factors of approximately 45–55%, this translates into roughly 8–10 TWh of electricity per year. This is enough to cover around 7% of current Dutch electricity demand, equivalent to more than 2 million households.

Part of the electricity is transported to shore via high-voltage cables and fed into the Dutch electricity grid. Another part is used to produce hydrogen through electrolysis. This hydrogen is transported to industrial clusters, such as the Port of Rotterdam, where it replaces fossil-based hydrogen and supports decarbonisation in sectors that are difficult to electrify.

Zeevonk is a joint venture between Vattenfall and Copenhagen Infrastructure Partners. In addition, a wide range of partners are involved, including turbine suppliers, offshore construction companies, research institutions, government bodies and industrial off-takers. This collaboration ensures the development, integration and operation of the full energy system.