LEDs, lithium batteries, solar, 230V, onboard home automation… In just a few years, marine electricity has changed its face. Thus, rewiring a boat no longer simply consists of replacing an obsolete electrical panel or a few worn-out marine cables.

Today, most equipment communicates with others: batteries, alternator, shore power charger, inverter, solar panels, navigation electronics… everything must work coherently. While onboard comfort and autonomy are progressing, the same is true for the technical complexity of the installation.

For a shipyard, whether it is a new build or a refit, outsourcing the electrical design and installation of a boat makes perfect sense. Here is why.

Marine electrical installation: a refit that has become more complex

Why has rewiring a boat become more complex? Discover point by point the impact of the latest developments on the onboard electrical installation.

Lithium batteries for boats: beyond simple replacement

Replacing traditional marine batteries to switch to lithium batteries involves, in most cases, a complete overhaul of the vessel’s electrical installation: adjusting or replacing the engine alternator, adapting the shore power charger, specific protections, battery supervision, load consistency…

In this regard, a poorly integrated lithium battery for a boat can quickly turn a modernization into a serious breakdown.

230V on board: modern comfort that requires marine electricity expertise

Thanks to the excellent efficiency of modern inverters and costs that have become more accessible, 230V is now finding its way onto pleasure boats, no longer being reserved for large units.

Air conditioning, cooking, IT… while the presence of 230V is synonymous with onboard comfort, it goes hand in hand with safety requirements (differential protections, AC/DC safety, overall installation consistency, compliance of connections…) which involve, to rewire a boat according to best practices, the intervention of seasoned specialists.

Marine home automation and digital switching: comfort and safety

Thanks to digital switching for boats which allows most equipment to be controlled from a single interface, home automation increases the level of comfort and safety onboard boats. Automatically turning off lights at dawn or monitoring batteries remotely involves a complex architecture, consisting of sensors, automation, communication between equipment, as well as a precise prioritization of electrical priorities.

Why outsource the electrical design and installation of a boat

A smoother refit project

Clear plans, consistent cable sections, anticipated equipment positioning, compliance with ISO standards… when the electrical architecture is thought out in advance, the installation gains efficiency. For a shipyard, delegating this phase helps limit reworks, unforeseen events, and time loss.

A scalable electrical installation

A boat electrical refit must not only meet immediate needs but also anticipate future equipment or technological developments, as well as the increase in energy consumption and new onboard uses.

An optimized installation without unnecessary replacement

Rewiring an electrical installation on a boat also consists of keeping what still works and adapting relevant equipment while modernizing what needs to be.

Electrical installation for boats: between safety, compliance, and durability

Onboard energy is a fundamental pillar of navigation. Risks of overheating, critical failure, or even major incident risks… in terms of electricity, successive modifications or temporary adjustments without a prior study risk weakening the entire vessel.

That is why it is crucial to ensure that an electrical installation complies with safety standards CE and that it has reliable diagrams while offering perfect technical consistency.

---

Shipyard, refit professional, or boat owner with an electrical modernization project? Koriolan supports you in the design, study, installation, and testing of your onboard systems in France (Atlantic, Mediterranean, Channel…) and throughout Europe: Baltic, North Sea, Black Sea, from the United Kingdom to Latvia, via Italy.

From new builds to complete refits, we design marine electrical installations built to last, evolve, and secure navigation.

Do you want to modernize your boat’s electrical panel or design a custom installation? Contact us to discuss your project!