Following a recent press release about ABB supplying an integrated DC power system for a series of DP2 shuttle tankers, can you elaborate on the role of this DC platform in this project and let us know what makes it particularly significant?
Let me start by saying that this project is a strong endorsement of our integrated marine power solutions and surely proves our commitment to driving innovation and efficiency at sea. These shuttle tankers will be equipped with our Onboard DC Grid™ incl. our PEMS™ power and energy management system), setting new high standards in efficiency and innovation. This technology enables highly efficient power distribution and supports hybrid and fully electric operations, and it is a major step forward in helping operators reduce emissions and fuel consumption while maintaining high performance in dynamic offshore environments.
ABB’s Onboard DC Grid™ allows for seamless integration of energy sources—whether it’s diesel generators, batteries, renewables, or future fuels—while optimizing power flow and minimizing losses. For shuttle tankers, which operate under variable load conditions and require high maneuverability, this system ensures both operational flexibility and energy efficiency. It also simplifies the integration of energy storage, which is key for reducing emissions during dynamic positioning and standby operations.
How does ABB’s Onboard DC Grid™ support DP2 requirements?
DP2 means the vessel must maintain its position and heading even in the event of a single fault in any active system. This requires redundant power generation and distribution, as well as fault-tolerant automation. The power system must be highly reliable and capable of instantaneous reconfiguration to avoid blackout scenarios.
The Onboard DC Grid™ architecture is inherently well-suited for DP2 vessels, as it allows for segregated power zones and redundant paths for energy flow. In case of a fault, the system can isolate the affected section and continue operating the rest of the vessel without interruption. This is critical for maintaining position during offshore operations.
You mentioned integration with batteries and renewables. How does the Onboard DC Grid™ support energy storage? What role does automation play in this system?
The Onboard DC Grid™ is inherently well-suited for energy storage systems (ESS). Since batteries operate on DC, integrating them into a DC-based power system eliminates the need for multiple conversion steps. This reduces energy losses and simplifies the system architecture. It also enables peak saving, load leveling, and zero-emission operation in ports or environmentally sensitive areas and can act as a back-up powering source for short-term operation.
Automation is a key enabler. The Onboard DC Grid™i s integrated with ABB’s PEMS™ power and energy management system. , which ensures optimal load sharing, fault management, and energy efficiency. It allows for real-time monitoring and control, which is essential for maintaining safety and performance, especially in complex operations like those of shuttle tankers.
How does this concept align with the maritime industry’s decarbonization goals? Are there any challenges in adopting DC systems over traditional AC?
I would say perfectly. Our platform supports the IMO’s 2030 and 2050 targets by enabling hybrid and fully electric propulsion; it contributes to reducing greenhouse gas emissions by optimizing fuel use and facilitating the adoption of low- or zero-emission technologies. It’s a future-proof solution that helps shipowners transition to greener operations without compromising performance.
The main challenge is the industry’s limited familiarity with DC systems, however ABB provides comprehensive support—from design to commissioning and lifecycle services—to ensure a smooth transition also for the operational part and crew familiarity with the system. The benefits in terms of efficiency, flexibility, and environmental performancei far outweigh the initial learning curve.
For this project the vessels will also be built to DNV’s Closed Bus-Tie (CBT) notation. From a technical perspective, how does ABB ensure system stability and fault resilience in a closed-bus DC environment?
The CBT notation is a game-changer as it certifies that the vessel’s power system can safely operate with closed-bus ties, which improves redundancy and power availability. This is especially critical for shuttle tankers engaged in dynamic positioning (DP) operations, where any power failure can have serious consequences. ABB’s power system architecture, combined with our advanced protection and control systems, is designed to meet these stringent requirements and enhance overall safety and reliability.
Stability and fault resilience are critical in closed-bus DC systems, especially under DP operations, therefore we use advanced fault management strategies – including fast fault isolation and selective protection – to maintain system integrity. ABB’s power control systems continuously monitor load and generation dynamics, ensuring optimal voltage control and load sharing. Combined with our proven automation and remote diagnostics capabilities, this architecture provides a robust foundation for safe, efficient, and future-proof vessel operations.
How do you see your position evolving in the global marine market in terms of electrification and what is your message to shipowners looking ahead to 2030 and beyond?
It looks like the future of shipping will be more electric, digital, and connected. For the shipowners, it always depends on the operational profile of a vessel and the ownership strategy, but given that regulations keep tightening and market expectations are rising, adopting new technologies carries less risk nowadays. In most cases, investing into new technolgies – especially in advanced power systems –not only provides environmental benefits and impact, but also offers a relatively fast ROI with a lower OPEX. We are seeing a growing demand for non-conventional solutions that combine efficiency, safety, and environmental performance, which demonstrates the shipowners‘ transition towards more advanced systems with a less conservative approach.
Ranging from electric propulsion and automation to shore connection and energy storage, our portfolio uniquely positions us to support shipowners and operators in meeting both operational and environmental goals. We’re continuously evolving our power system platforms and as vessels become subject to stricter environmental regulations, power systems such as the Onboard DC Grid™ will be a cornerstone of next-generation marine power systems. In this way we contribute to charting the course for cleaner, smarter, and more resilient marine operations worldwide.
*Head of Regional Sales, ABB Marine & Ports
