Organizing the Orchestra – The Role of Electrical System Integration

A vessel may be built from strong components. But what happens if they are not connected as one system? How do you make long-term ship design decisions in an operating environment that keeps changing? 

These questions become even more relevant as both newbuilds and retrofits grow increasingly advanced and electrified. Today, onboard systems must interact seamlessly to ensure efficient and reliable operations. 

What makes that seamless interaction possible is Electrical System Integration (ESI), providing a structure that allows power, control, and propulsion systems to work together. 

Straightforward Is Not Always Optimal 

Developing onboard electrical systems used to be much easier. The approach was straightforward: select the individual components deemed optimal for the vessel. 

But as vessels have become increasingly electrified and hybridized, with higher demands on efficiency, this individual component approach carries all the more downsides. 

Trying to piece together individual components without a full-system view can create long-term challenges: 

• Equipment may end up being over-dimensioned or underutilized 

• Energy may be used inefficiently 

• Flexibility for future upgrades might be limited 

What seems like the simplest route in the early stages can become costly and restrictive over time.  

ESI, on the other hand, is not about adding complexity. It is about making advanced functions easier to use for operators. By understanding how power is produced and consumed onboard, well-planned electrical integration can support the balance between supply and demand. That is why early integration thinking matters. 

The Conductor Within the System 

On a vessel, every component and system has a role to play. Oddly enough, comparing vessel operations with an orchestra makes the role of ESI easier to understand. 

To achieve a harmonious symphony, all instruments need to perform in the right way. The conductor guides them, ensuring that everything is played with the right rhythm and intensity, at the right time.  

ESI can be seen as the framework that brings the orchestra together, connecting power, control, propulsion, and other onboard systems. Within that framework, it is the Energy Management System (EMS) that takes on the role of conductor.  

The EMS helps coordinate how power is produced, distributed, and used across the vessel, so the vessel’s systems can perform together in real time. It also controls power management functions and safeguards battery lifetime by managing how energy is used.  

By turning separate functions into a coordinated performance, control over the vessel’s operation is improved. This serves as a clear example of how the real value does not lie in each component alone, but in the interaction between them. 

Engineered Around the Operational Profile 

Every vessel has a unique operational profile. Laying the foundation for successful integration comes down to early planning, and a full understanding of the vessel — whether it is a newbuild or a retrofit.  

Duty cycles, load variations, redundancy requirements, and environmental conditions are just a few of the factors that shape the engineering behind a complete solution. 

By understanding how power is produced and consumed onboard, as well as how it interacts with propulsion and other onboard systems, the design can be approached at system level rather than component by component.  

The objective is not simply to maximize the capabilities of individual components or systems. It is about ensuring an equipment setup that is adapted to the vessel’s operational profile. 

Vessel-Specific Redundancy 

How does one predict the unpredictable at sea? Historically, vessels have often been designed with more equipment than required. 

Modern automation and ESI design make it possible to engineer redundancy around the vessel’s actual application, reducing unnecessary capital expenditure (CapEx). Achieving vessel-specific redundancy can also help reduce operational expenditure (OpEx) and limit the number of potential failure points. 

Redundancy is key, but this is best achieved by selecting onboard equipment that is relevant to the vessel’s operational reality.  

You cannot account for every possible scenario at sea. But by understanding the vessel and the operational realities at hand, it becomes easier to assess risks and plan ahead. 

Propulsion Experience Translated into ESI Expertise 

What does a propulsion provider know about Electrical System Integration? The fact is that the two go hand in hand.  

A strong propulsion background forms a valuable basis for ESI expertise. For Berg Propulsion, that very connection is central to its integration approach.  

“Understanding the vessel’s largest power consumer, the main propulsion system, provides a perspective that becomes highly relevant in modern vessel operations. The importance lies in making sure that the electrical system and the propulsion train work in unison,” says Hampus Karlsson, Technical Sales, ESI, at Berg Propulsion.  

This is especially relevant for fuel-electric, hybrid, and fully electric propulsion systems, where electrical integration and propulsion performance are closely connected. 

Whether you are preparing a newbuild or looking to extend the lifecycle of an existing vessel, early dialogue can make a lasting difference. To learn more about how Berg Propulsion can support Electrical System Integration in your operations, contact your local Berg Propulsion expert.