Electric
Propulsion Systems

for New Build Ships

The maritime industry is moving toward cleaner, more efficient propulsion and regulations are making it non-negotiable. Whether you’re specifying a ferry, offshore support vessel, cargo ship, or research vessel, integrating an electric propulsion system at the newbuild stage is the most cost-effective way to future-proof your vessel, reduce OPEX, and stay ahead of IMO compliance requirements.

An electric propulsion system uses electric motors to drive the propellers. Power is supplied by generator sets, batteries, or a combination of both. An Energy Management System (EMS) sits at the centre of the architecture, distributing load intelligently across all power sources.

The key advantage: generators run at their optimal efficiency point regardless of how propulsion demand varies. At lower speeds, fewer generators run online. At peak demand, batteries cover the shortfall. The result is less fuel burned, fewer emissions produced, and lower wear on your engines across the vessel’s entire operating life.

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Why choose Neptunus?

3 Decades of
Service Excellence
Engine & Propulsion
End-to-End Solutions
2500+ Successful Projects Delivered Worldwide
Trusted by 100+
Satisfied Customers
Dedicated Experts to
Address Emergencies

Benefits of Electric Propulsion Systems

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How we set up Electric Propulsion System?

1. Vessel Specification Review

We analyse your route profile, power budget, vessel type, and classification requirements before any architecture is proposed.

2. System Design

Power balance, redundancy configuration, EMS logic, and battery sizing are engineered to your vessel's specific operational demands.

3. Component Integration

We work with your shipyard and selected OEMs to integrate motors, drives, switchboards, and energy storage into a single coherent system.

4. Class Approval Support

We manage the documentation and approval process with DNV, Lloyd's Register, Bureau Veritas, or ABS as required.

5. Commissioning and Sea Trials

Full system commissioning at the yard, followed by sea trial verification and crew handover.

6. After-delivery Support

Remote monitoring, software updates, and a global service network covering your vessel's operating regions.

The specification process should begin 18–36 months before keellaying. The earlier electric propulsion is integrated into the hull design, the better the outcome — for layout, cabling, weight distribution, and cost.

FAQs

An electric propulsion system uses electric motors to drive a vessel’s propellers, with power supplied by generator sets, batteries, or both. An Energy Management System controls the whole architecture, allowing generators to operate at peak efficiency regardless of how propulsion demand changes.
Diesel-electric uses onboard generators to produce electricity that powers electric motors no mechanical connection between engine and propeller. Full-electric relies entirely on battery storage with zero onboard combustion. Diesel-electric suits long-range and DP vessels; full-electric suits short-sea routes with reliable port charging.
By separating power generation from propulsion, generators always run at their most efficient operating point. Battery storage handles peak demand and covers low-load periods meaning fewer generators online, less fuel burned, and less engine wear.
Yes. Electric and hybrid-electric propulsion reduces carbon intensity per tonne-nautical mile, directly supporting strong CII ratings and EEDI Phase 3 compliance for qualifying vessel types.
Ideally 18–36 months before keel laying. Early integration with the shipyard’s design team allows the propulsion architecture to inform hull layout, cabling runs, and space allocation delivering a better technical and commercial outcome than late-stage integration.
This page has been technically reviewed by the engineering leadership team at Neptunus Power Plant Services Pvt. Ltd.
Last Updated: June 2026

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