Rolls-Royce is supplying eight mtu 20V4000M35S power generators to Baleària for two new fully electric fast ferries, delivering a total backup capacity of over 22,000 kW. These identical catamarans, built by Astilleros Armon, will launch the first intercontinental “green corridor” between Tarifa, Spain, and Tangier, Morocco, starting in 2027. The mtu gensets provide critical redundancy, capable of powering both the onboard electrical systems and the entire propulsion network in the event of charging delays.
Germany | January 5, 2026 – In a move that signals a tectonic shift for Mediterranean maritime logistics, Rolls-Royce Power Systems has secured a landmark contract to supply eight mtu emergency power generators for Baleària’s upcoming fleet of fully electric fast ferries. This partnership is the technological backbone of what is set to become the first “green corridor” connecting Europe and Africa.
Starting in 2027, two zero-emission catamarans will service the high-traffic 18-nautical-mile route between Tarifa, Spain, and Tangier, Morocco. While the primary mission is 100% electric propulsion, the inclusion of high-output mtu systems underscores a critical reality in the energy transition: the uncompromising necessity of redundant, high-density backup power in mission-critical marine environments.
Technical Specifications: The mtu 20V4000M35S Advantage
The contract, commissioned by the Spanish shipyard Astilleros Armon, involves the delivery of four mtu 20V4000M35S gensets for each vessel. These units are not merely “emergency lights” generators; they represent a massive power reserve designed to integrate into a sophisticated electric architecture.
| Feature | Specification |
| Model | mtu 20V4000M35S |
| Unit Output | 2,840 kW |
| Total Fleet Output | 22,720 kW (11,360 kW per ship) |
| Primary Role | Emergency backup and propulsion redundancy |
| Target Vessel | Fully electric catamarans (804 pax / 225 vehicles) |
| Delivery Date | First half of 2026 |
These generators are specifically chosen for their high power-to-weight ratio. In the world of high-speed catamarans, every kilogram saved translates directly into battery range and efficiency. The mtu units provide the necessary “kick” to not only maintain onboard life-support systems but to secure the entire propulsion system should the battery arrays encounter charging delays or technical faults in port.
The Strategy: Bridging Continents with Electrons
The Tarifa-Tangier route is one of the most strategically significant maritime links in the world. By electrifying this passage, Baleària is positioning itself at the vanguard of the International Maritime Organization’s (IMO) revised GHG strategy.
Ricardo Garcia, Head of Marketing, Sales & Business Development at Astilleros Armon, emphasized the integration challenges of such a project “For us as a shipyard, the integration of powerful, compact systems is crucial, especially in innovative ship projects such as this one. The mtu gensets meet these requirements perfectly.”
For Baleària, the move is as much about operational reliability as it is about ESG (Environmental, Social, and Governance) goals. The ferries will cruise at speeds up to 26 knots, a demanding pace for battery-electric vessels. The presence of 11,000+ kW of backup power per ship provides the “fail-safe” required to transition away from traditional heavy fuel oils (HFO) without risking the schedule integrity of a vital trade route.
Market Context: Rolls-Royce’s Financial Momentum
The announcement comes on the heels of a blockbuster financial year for Rolls-Royce Holdings plc. Reporting an underlying revenue of £20.1 billion and an operating profit of £3.46 billion for 2025, the company’s “Power Systems” division remains a crown jewel in its multi-year transformation program.
Headquartered in Friedrichshafen, Germany, the Power Systems division is pivotally shifting its portfolio toward climate-friendly technologies, including battery containers and microgrids. This Baleària project serves as a live demonstration of how heritage internal combustion expertise (the mtu brand) is being adapted to support the nascent electric marine market.
Looking Ahead: 2027 and Beyond
The delivery of the gensets is scheduled for the first half of 2026, allowing for a rigorous integration and sea-trial phase before the ferries enter regular service in 2027.
As the industry watches the development of this European-African “Green Corridor,” the collaboration between Baleària, Astilleros Armon, and Rolls-Royce provides a blueprint for the future. It proves that the path to zero emissions is not just about removing engines, but about engineering smarter, more resilient systems that can bridge the gap between today’s infrastructure and tomorrow’s ideals.
“Our mtu engines make an important contribution to the operational safety and efficiency of these state-of-the-art ships—powerful, lightweight and perfectly tailored to maritime requirements.” said Phil Kordic, Senior Expert, Commercial Marine Business, Rolls-Royce Power Systems.
About mtu (Rolls-Royce Power Systems)
mtu is the core product and solution brand of Rolls-Royce Power Systems, a division of Rolls-Royce Holdings plc. Headquartered in Friedrichshafen, Germany, mtu is synonymous with high-performance propulsion and power generation systems that drive the world’s most demanding maritime, land, and defense applications.
For over 110 years, mtu has provided the technical excellence required for mission-critical operations. Today, the brand is undergoing a profound transformation to become a provider of integrated, sustainable climate-neutral solutions.
Powering the Zero-Emission Future
As a leader in the global energy transition, Rolls-Royce Power Systems is pivoting its mtu portfolio toward a “Net Zero” future through three strategic pillars:
- Sustainable Internal Combustion: Approving its legendary Series 2000 and 4000 engines for use with sustainable fuels like HVO (Hydrotreated Vegetable Oil) and e-diesel, offering an immediate path to CO2 reduction.
- Hybrid & Electric Systems: Developing sophisticated hybrid-electric propulsion architectures and battery storage solutions (mtu EnergyPack) that allow vessels to operate silently and without emissions in sensitive coastal areas.
- Green Hydrogen & Methanol: Pioneering the development of methanol-powered engines and hydrogen fuel cell systems, which are set to redefine long-range, carbon-neutral shipping.
With a global service network and a commitment to “Power that Matters,” mtu remains the preferred partner for shipyards and operators who refuse to compromise between operational reliability and environmental responsibility.
Source: Rolls-Royce