Maersk to Pilot Battery System to Improve Power Production at Sea

Install a battery system on Maersk ships to boost power production at sea, trim emissions, and cut fuel use on a long voyage.

The planned trial will evaluate a modular, installed battery bank that can support peak loads and assist propulsion during sail legs. The system will be sized for typical voyage profiles and monitored via a subscription service to collect data and fine-tune performance. Operators should expect reduced generator runs and lower emissions during port calls and high-demand legs. This setup makes it possible to improve energy resilience and cut fuel use across the voyage.

news briefs describe how crews can keep power reserves ready and use battery energy to smooth marine loads. The article outlines how calls from customers and regulators shape the scope of the trial, with a path toward more инновация and data sharing with them through a dedicated platform.

Over the coming years, the project will scale from the east to other routes and fleets. The design emphasizes quick installed packs that can be upgraded as инновация advances, keeping the fleet resilient and enabling a subscription-based loop for performance metrics. These steps align with calls from regulators and partners to reduce emissions and to shift towards cleaner fuels.

Maersk Battery System Pilot for Power at Sea

Start a focused trial of the Maersk Battery System Pilot for Power at Sea on two vessels to prove viability and deliver measurable emissions improvements within this year, while setting a clear goal for customers and partners.

Over years of development, Søren coordinates a modular system delivering about 2.0 MWh per vessel, enabling up to 1.2 MW of auxiliary power to run on batteries during cruising and port operations, which targets a 15% fuel saving and a 20% reduction in emissions on trial routes along the cape and other global corridors while ships operate at moderate speeds.

The trial centers on measurable indicators: viability of battery packs over year-long cycles, charging times under port constraints, lifecycle implications, and the impact on engine operating profiles. We will track reliability, availability, and customer satisfaction, with data feeds to Maersk’s global network to continuously tune the energy management towards a net-zero goal, improving efficiency over time. The approach simplifies maintenance by standardizing modules and remote diagnostics, enabling faster turnarounds and consistent performance.

In the news cycle, the pilot will roll out in phases across countries and ports, delivering insights on feasibility and operating conditions in diverse marine environments. The plan will continue to refine the balance between battery capacity and auxiliary demand, ensuring the system will simplify energy management while reducing emissions. This innovation will enable customers to move toward sustainable shipping while maintaining schedule reliability in a global fleet.

For governance, Maersk will set a year-by-year roadmap, with milestones: complete the phase-one trial in 12 months, scale to additional vessels in the next year, and publish progress on news channels. The team will collaborate with regulators in key marine countries to ensure compliance and establish a robust safety framework. If the trial meets its goal, Maersk will seek broader adoption across its network and beyond, expanding into more countries and new vessel types, continuing to push toward lower emissions and improved reliability.

Containerised Battery Modules: capacity, placement, and shipboard integration

Recommendation: Place two to four 40-foot containerised battery modules mid-ship, centerline, on vibration-damped racks inside a sealed battery room with direct tie-ins to the ship’s DC bus and a dedicated cooling loop. This setup provides roughly 2–6 MWh of energy storage for a typical pilot vessel, enabling 2–4 hours of peak shaving and reducing genset cycling during port calls.

Capacity and sizing: Each 40-foot module stores about 1.0–1.5 MWh; two modules yield 2–3 MWh; four yield 4–6 MWh. Mass is around 18–25 tonnes per module and footprint about 12 m by 2.4 m. For a compact installation, target 2–4 MWh total and maintain 1–1.5 m clearances for maintenance. Charging rates at 0.5–0.8C translate to roughly 1–1.5 MW per module, so a two-module bank can accept 2–3 MW; full recharge from 20% to 90% takes about 2–5 hours, depending on shore power or onboard generators.

Placement and safety: Position modules on the ship’s centerline to preserve stability, preferably in a dedicated deck enclosure or reinforced lower deck area with access to cooling water and fire suppression. Use corrosion-resistant, weatherproof enclosures and a robust BMS integrated with the ship systems. Design for salt spray, motion, and vibration, and provide rapid fault isolation and safe evacuation routes. Ventilation and heat removal must meet class requirements, with redundant cooling pumps and alarms.

Integration and operations: Connect to the integrated power management system and connect battery controls to the vessel energy management logic. Tie the ESS to both shore charging and on-board generators to enable flexible operations, reduce emissions, and smooth diesel loading. Keep data flows and alarms centralized for remote monitoring, and plan maintenance windows that align with port calls to minimize impact on the fleet.

Announced as part of Maersk’s next wave, the pilot aims to prove viability across the global fleet and in a coastal town along key trade routes. The project, led by Søren (søren), demonstrates a simple, integrated approach to energy systems that enables sustainable, climate-friendly operations; it helps simplify crew workflows and maintenance. Feedback from developing markets and other regions will shape adoption pace across the fleet and across global trade, reinforcing Maersk’s leadership in reducing fossil fuel use and emissions while supporting a resilient maritime sector.

Power Management Strategy: supporting peak loads and shore power options

Install a modular energy management system with an installed battery bank and a shore power interface to support peak loads and enable port electrification.

Planning targets a 12-month trial across four vessels, with 2.5–4 MWh of installed capacity per ship assembled from 1 MWh blocks, allowing more capacity in years ahead.

During berths, switch to shore power to eliminate idle gensets; during sea segments, the battery supports peak propulsion and hotel loads, having this capability improves reliability and supports full operating flexibility while reducing fuel burn.

To track progress, maintain a register of performance metrics: state of charge, peak load support, onboard energy use, and the share of power from shore versus from the installed system. This article notes how data will inform planning and risk management.

Expected outcomes include 15–25% fuel savings during port stays, 8–12% lower carbon intensity per voyage, and neutral operation gains and neutrality across routes.

Cape routes and town calls will receive ready shore connections; this approach will simplify planning and enable full operating flexibility along the fleet. Having installed modules, the fleet can scale across more vessels for this program.

Trial results will feed design decisions and help improve the electrical backbone of the fleet, reinforcing reliability, reducing costs, and supporting neutrality in emissions over a multi-year horizon.

Emissions Impact: expected reductions and data collection plan

Take a structured data collection plan during the Maersk pilot to quantify emissions reductions from the battery system. Implement measurements of fuel burn, engine load, and battery state of charge across both propulsion and non-propulsion loads, with a focus on transitions between power sources. Target a 12–18% reduction in fuel consumption on legs where the battery provides assist, delivering significant reductions in CO2 and NOx, more than offsetting non-propulsion load. Track the storage contribution alongside integrated systems to show how the hybrid setup performs against them and other systems on board. Ensure compliance with maritime regulations and with the announced testing framework, starting from the east port calls in a port town. Also assess ethanol viability as an alternative energy vector to support decarbonization, while keeping the goal to simplify data handling and enable timely decisions towards zero-emission вехи.

To build the data set, deploy sensors on the main engine, gensets, and battery storage system; log fuel flow, exhaust emissions (CO2, NOx, PM), electrical energy drawn and returned to storage, battery state of charge, and ambient conditions. Use a unified data model that time-stamps every metric and ties voyage leg data to specific routes and loads. Data cadence: 1-minute intervals during voyage, 15-second spikes during transitions, and full log dumps at port town handovers. The metrics used in the model help compare performance across legs and ships, and support planning with quarterly reviews to adjust targets. Store results on a secure server with access controls to protect compliance data and to support future benchmarking.

The emissions impact will materialize as engine-hour reductions, smoother power transitions, and better alignment of non-propulsion demand with battery storage. The plan includes publishing results to press and partner fleets, with details that support regulatory compliance and public transparency while safeguarding sensitive operational data. The data collection framework will be announced to stakeholders ahead of the next leg, enabling lessons learned to inform scale-up across east-to-west routes and other markets.

In the longer term, set a clear compliance goal and outline how the pilot supports a transition toward wider adoption, including ethanol viability and storage expansions. This approach keeps operations predictable for the town and port authorities while enabling scalable rollout with other fleets and routes. The plan announced to external audiences demonstrates that the maritime sector can cut emissions while maintaining reliability.

Safety, Certification, and Crew Training for Battery Installations

Ensure every containerised battery system installed on a vessel undergoes independent safety certification before its first trial voyage. The certification should cover mechanical integrity, thermal management, electrical protection, fire suppression, and safe maintenance procedures for onboard crews. Require a full documentation package from suppliers including system architecture, component provenance, and validation test results for energy management and propulsion interfaces.

Develop a formal risk assessment and testing plan tied to the transition to battery power, with repeatable tests that demonstrate significant resilience under varied marine conditions. Include fire scenario drills, battery module cooling performance, and safe disconnection procedures during calls in port or at sea.

Crew training should be role-based, with hands-on practice on installed systems and containerised energy stores. Programs should be delivered via a subscription model for ongoing updates as configurations evolve and new standards emerge. Training must address neutrality of power sourcing decisions, with exercises that reflect cargo and voyage scenarios.

Operational guidance: While at sea, crews monitor thermal, electrical, and state-of-health indicators using an approved energy management system. Establish clear calls for action in abnormal situations and ensure that ethanol is considered as a supplementary fuel option for auxiliary gensets only when authorized, coordinated with shore teams and cargo operations.

Global frameworks should align safety criteria with marine authorities, class societies, and international trade practices to enable uniform certification, installation, and maintenance across global fleets. Along with this, regulators should publish performance metrics for energy storage systems to support trial deployments and to show viability across different voyage profiles.

Testing Roadmap: pilot milestones and criteria for scaling toward 2030 goals

Begin the pilot with three marine terminals in the east trade to validate installed electrical capacity, non-propulsion loads, and charging profiles, while testing ethanol to support emissions reductions and fuel flexibility. The effort will commit fleet operators and port authorities to data sharing, enabling a transparent evaluation of reliability and carbon impact.

1. Baseline and readiness (0-3 months)
   • Installed capacity confirmed: 2.5 MW per site; total 7.5 MW across three terminals including cape ports.
   • Non-propulsion load profiles mapped; moving and standing loads captured; charging windows defined.
   • Commitment from east trade fleets and terminals secured; data-sharing protocol in place.
2. Hardware integration and test plan (3-9 months)
   • The electrical architecture matures as control software integrates with shore grids and shipboard systems.
   • Reliability targets set: 99.5% availability for the pilot window; MTBF > 1,000 hours for critical components.
   • Generators interaction and fuel strategy documented; ethanol compatibility tested for marine engines and safety checks completed.
   • Transportable charging units installed at each terminal; typical charging time for standard loads under 2 hours.
   • cape region coordination ensures dockside access and safety compliance at all sites.
3. Pilot operations and data collection (9-15 months)
   • Move from static tests to moving loads on vessels and shore power to validate energy flows from non-propulsion use cases.
   • Monitoring of fuel consumption, carbon indicators, and emissions baselines updated quarterly.
   • Fleet involvement includes 2–3 vessels plus support ships; data collection meets MTBF and reliability targets.
4. Emissions, reliability and fuel testing (15-21 months)
   • Emissions reductions quantified per port call and per voyage; carbon accounting aligned with established protocols.
   • Reliability metrics meet thresholds for continued operation; scheduled maintenance reduces downtime.
   • Fuel strategy validated: ethanol tests demonstrate compatibility; supply reliability and price sensitivity tracked at terminals.
5. Scaling criteria and governance (21-24 months)
   • Evaluation gate: if pilot metrics show targeted reliability and emissions reductions, proceed to fleet-wide deployment.
   • Investment plan updated; risk and regulatory considerations mapped; governance structure formalized for scale.
   • Take and use a data-driven decision framework to align with trade routes and capex plans for 2030 milestones.