Molslinjen electrifies giant catamarans on the Kattegat

Molslinjen has just placed an order for two battery-powered giant catamarans for its Kattegat route – marking the launch of the world’s largest electrification project at sea. The ferries will be built by Australian shipbuilder Incat, and a third vessel is also expected to join the fleet in Denmark during 2027 and 2028.

On this illustration, you see the future look of the world’s largest electric catamarans set to sail the Kattegat.

The owners behind Molslinjen, Nordic Ferry Infrastructure, have placed a multi-billion (DKK) order for two battery-electric high-speed catamarans to serve the route across the Kattegat. The vessels will be built at Incat’s shipyard in Tasmania, where several of Molslinjen’s current fast ferries were also constructed.

A third ferry is also in the planning stages, with discussions ongoing with multiple shipyards capable of delivering a vessel identical to the first two. If all three ferries are realized, the Kattegat route will become the world’s largest electrification project at sea to date. The first of the three ferries is expected to arrive in Danish waters around the turn of the year 2027–2028.

“For many years, Molslinjen has been critical infrastructure, creating cohesion by forming a floating bridge between Jutland and Zealand. Now, we’re making that floating bridge significantly greener – setting a milestone in the green transition for ferry operations and for Denmark,” says Carsten Jensen, CEO of Nordic Ferry Infrastructure, which owns Molslinjen and the Norwegian ferry operator Torghatten.

Each of the three ferries will measure 129 meters in length and 30.5 meters in width, accommodating up to 1,483 passengers and 500 cars. This is 11 percent larger than Bornholmslinjen’s Express 5, which – by vehicle capacity – is currently considered the world’s largest catamaran. The addition of these new vessels will increase total capacity for cars and passengers on the Kattegat by more than 25 percent.

Each ferry will be equipped with battery packs of 45,000 kWh, powering the ships to speeds of over 40 knots – that’s more than 74 kilometers per hour.

“This is a massive undertaking, involving not just the three ferries but also extensive land-based infrastructure projects and energy storage systems for the new ships,” says Kristian Durhuus, CEO of Molslinjen.

The total investment for the three ferries and their associated onshore infrastructure is expected to be around DKK 3.5 billion.

Molslinjen’s fast ferries were specifically mentioned in the Danish green tax reform – a package of political initiatives aimed at reducing greenhouse gas emissions and accelerating the green transition.

As a result, Molslinjen has now applied for support from the government’s green funding program to help finance the electrification of its Kattegat operations. The possibility of state support has been the decisive factor behind the company’s decision to place the order.

“We now have two and a half years to get ready for full electric operation on the Kattegat. It’s a fantastic milestone for our company. We are among Denmark’s five largest CO₂ emitters, and with support from the fund, we and the government now have a chance to remove 132,000 tons of CO₂ emissions from Denmark’s climate footprint each year,” says Kristian Durhuus.

The ferries will be able to charge at both Aarhus and Odden harbors. When plugged in, a single catamaran will charge with 15 kV AC at 55,000 kW for 30 minutes – receiving an average of 25,000 kWh of energy before its next journey.

That’s enough to power an electric car for a 150,000-kilometer drive on a single charge.