Yacht Electrical Engineering

Designed for your yacht. Connected to every system.

Heavy Seas provides electrical engineering services in Mallorca and across the Mediterranean for yachts and superyachts, covering system design, installation, diagnostics and commissioning.

From individual upgrades to complete installations, each solution is tailored to the vessel’s technical requirements and operational needs.

Turnkey Electrical Projects

We design bespoke electrical architectures for new builds and major refits, meeting applicable classification society requirements (Class-Compliant) and ensuring integration with the yacht’s other systems.

Routine maintenance can include

Technical Engineering: Load calculations, system design drawings and complete documentation ready for class inspection.
Comprehensive Supply: Custom electrical panels, heavy-duty cabling, protection devices and measurement equipment.
Complete Project Management: A single point of contact coordinates every stage, from design to certified commissioning, removing the need to manage multiple suppliers.

Energy & Power Management

Onboard power requirements change as equipment is added and the way a yacht is used evolves. Generation, storage and distribution need to work together to support those demands.

What this service includes:

Battery Banks

Installation and configuration of lithium, AGM and GEL battery banks to suit onboard requirements.

Generation & Backup Power

Power Management Systems (PMS), generator synchronisation and uninterruptible power supplies (UPS).

Inverters & Shore Power

Energy conversion solutions adapted to the yacht’s electrical system and shore supply requirements.

Electrical Diagnostics & Class Preparation

Electrical assessments help establish the condition of existing installations and identify areas requiring attention before repairs, upgrades or class inspections. The findings help prioritise maintenance and define any corrective work needed.

Diagnostic services:

Electrical Testing

Load bank and insulation resistance testing to assess performance and insulation condition.

Thermography & Power Quality

Thermal inspections, harmonic analysis and network audits to investigate electrical irregularities.

Class Inspection Support

Technical assessments and documentation to help prepare electrical systems for class inspections.

Frequently Asked Questions

About Electrics

Can electrical work be included in a yacht refit?

Yes. Electrical upgrades can form part of a wider refit, with the scope and schedule coordinated around the other work onboard.

Can you upgrade part of an existing installation?

Yes, subject to an assessment of the existing system’s condition, capacity and compatibility with the proposed equipment.

What information is needed to assess a project?

Existing electrical drawings, equipment specifications and details of the proposed changes provide a useful starting point for defining the scope.

How long does an electrical project take?

Timing depends on the scope, equipment availability, access onboard and testing requirements.

Do you support preparation for class inspections?

Yes. We provide testing and technical documentation to support preparation. Final approval remains with the relevant classification society.