Belgium Pins Wind Tender on Energy Island

Belgium is getting ready to sell the next piece of its offshore wind future. The new auction will cover capacity in the Princess Elisabeth Zone, with power expected around 2031. On paper, it is a Belgian tender: Belgian waters, Belgian policy, Belgian turbines. Under the waterline, though, the project is more ambitious. The artificial energy island being built offshore is designed not just to bring power home, but to connect into neighbouring grids. That makes this a practical test of whether the North Sea can become a shared renewable power basin, rather than a collection of national projects facing the same weather (FPS Economy Belgium).

The first gains will not show up on household bills. They will go to the developers that win contracts banks are willing to finance, to ports and engineering firms with limited installation capacity, and to grid operators building regulated infrastructure. Consumers benefit only if lower dependence on fossil fuels eventually feeds through into lower system costs. That is not guaranteed. Grid charges and state-backed support payments also end up in electricity bills, so the real distribution depends on decisions Belgium has yet to make.

An island wired for more than one country

Princess Elisabeth Island, being built by Belgium’s transmission operator Elia, will gather electricity from new wind farms and support high-voltage links to other countries (Elia). It is part of the cross-border grid vision set out at the 2023 Ostend summit, where Belgium, Germany, Denmark and the Netherlands agreed to co-ordinate cables between countries, rather than build the old model of one wind farm sending power to one shore (North Sea Summit Declaration).

The Commission’s offshore strategy sets out the basic economics. Offshore wind becomes more valuable when cross-border cables and market rules allow electricity to move to where demand is strongest (EUR-Lex). In Europe’s coupled electricity market, power flows from cheaper areas to more expensive ones through co-ordinated auctions. Belgian offshore wind can therefore lower prices in the Netherlands or Germany as well as at home, while also moving the pressure point to whichever grid connection becomes congested next.

Belgium is entering the same delivery window as the Danish-German Energiø Bornholm project, which will link offshore wind to substations in both countries, with major construction due to begin around 2027-28 (Bornholm.dk). That means the same cable suppliers, converter platforms and installation vessels will be in demand at the same time.

The contract design carries the real risk

Europe has already paid for mistakes in offshore wind tender design. The zero-subsidy model used by the Netherlands and Germany between roughly 2019 and 2025 fell apart once higher interest rates and construction costs made projects impossible to finance. Governments are moving back towards contracts for difference, or CfDs. Under that model, the state guarantees a minimum price for each unit of electricity. If the market price falls below the agreed "strike price", the government pays the difference. If the market price rises above it, the developer pays money back (European Commission).

The public exposure can be substantial. Last week, the Commission approved a French offshore wind support scheme covering 11.1 GW, with a theoretical ceiling of €63bn over 25 years (Commission européenne, Connaissance des Énergies). That ceiling falls if wholesale prices stay high. Still, it shows how much fiscal space these promises can occupy.

Germany’s energy industry association BDEW is pushing for inflation-indexed CfDs, arguing that fixed-price bids leave developers carrying cost increases that appear after auction day (Energie & Management). Belgium faces the same choice. If it indexes the strike price to inflation, the state absorbs more risk. If it fixes the price, developers either bid higher at the start or decide the numbers do not work.

The bigger constraint across the region is the grid. The Commission’s grid action plan warns that transmission networks need to expand faster if they are to cope with renewables and electrification (European Commission). Offshore wind without enough grid capacity is expensive steel waiting at sea.

Lower fuel dependence does not mean lower bills

The structural prize is clear: less reliance on gas and coal. But that only reaches household bills through a chain of policy choices Belgium has not yet settled. Network fees for Princess Elisabeth Island and its cables, levies to fund CfD payments, and balancing costs when wind output rises and falls will all have to be allocated. Each decision lands differently on heavy industry, small businesses and households.

Belgium’s tender rulebook is still missing the details that matter most: strike prices, indexation, liability if the grid is late, and what happens when wholesale prices turn negative. Belgium is not simply buying turbines. It is deciding who carries the financial risk of a cross-border power system whose wires are still catching up.