MAN Engines Expands 30-Litre Marine Genset Portfolio

Power generation for workboats, ferries and large yachts
Marine workboats, offshore vessels, ferries and large yachts increasingly rely on compact, high-output auxiliary engines to supply stable onboard power and support diesel-electric propulsion concepts. In response to these requirements, MAN Engines has expanded its 30-litre engine portfolio with a new auxiliary variant designed specifically for onboard generator sets and integrated energy systems.

Based on the established V12 platform, the new auxiliary configuration extends the use of the 30-litre series beyond main propulsion, enabling a unified engine family for propulsion, onboard power generation and hybrid applications within the same vessel design.

Power ratings tailored to onboard electrical systems
The auxiliary version of the engine is available in two generator configurations: 840 kW at 50 Hz and 960 kW at 60 Hz. These power levels support both conventional onboard electrical grids and diesel-electric propulsion architectures, where stable frequency control, fast load acceptance and smooth operation under variable loads are critical.

The engine’s load-step behaviour is designed to handle sudden changes in power demand while maintaining voltage and frequency stability. This characteristic is particularly relevant for vessels operating cranes, winches, thrusters or hotel loads under fluctuating conditions. Continuous-duty robustness remains consistent even in demanding operational profiles.

Compact V12 architecture for space-restricted engine rooms
Space constraints remain a defining challenge in modern vessel design, especially where hybrid energy systems or multiple gensets must be integrated. The compact dimensions of the 30-litre V12 architecture enable installation in confined engine rooms without compromising service accessibility.

This makes the auxiliary engine suitable for vessels such as offshore support ships, harbor craft, ferries and large yachts, where modular power generation and future retrofit capability are increasingly required. The ability to deploy the same engine platform across main propulsion and onboard power simplifies integration, spare-parts management and lifecycle planning.

Global emission compliance with modular aftertreatment
The auxiliary engine is available in configurations meeting IMO Tier II, IMO Tier III and EU Stage V emission requirements. Compliance is achieved through a modular exhaust aftertreatment concept that can be configured with SCR or SCR-DPF systems depending on regulatory and installation constraints.

The space-efficient aftertreatment architecture allows operators to meet regional and international emission regulations without sacrificing engine room volume. This flexibility supports operation in regulated coastal zones, inland waterways and offshore markets worldwide.

Unified platform across propulsion, auxiliary and hybrid systems
The 30-litre platform already serves a broad range of applications, from workboat propulsion to high-output yacht engines and stationary power generation. With the introduction of the auxiliary variant, the platform now covers main drives, onboard power supply and diesel-electric configurations within a single, technologically consistent engine family.

This approach enables shipyards and operators to standardize across multiple systems, improving technical compatibility and reducing complexity throughout vessel design, commissioning and long-term operation.

The auxiliary engine variant completes a marine power range spanning from 280 kW to 960 kW for onboard units, while complementing propulsion engines rated up to 1,618 kW. The new auxiliary configuration is now available for marine projects.

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