General brochure for our high-performances Li-ion batteries with patented immersion cooling technology.

WATTALPS brochure

At WATTALPS, we support shipyards and naval engineers in successfully designing and electrifying their boats by providing advanced battery solutions. 
With 8 patents, WATTALPS batteries are based on Immersion Cooling Technology, delivering best thermalization, performance and safety. Their modular design ensures seamless integration within your space requirements. 
WATTALPS batteries successfully passed the non-propagation of thermal runaway tests witnessed by BV for Maritime Type Approval.

WATTALPS

WATTALPS Battery system.jpg

WATTALPS Maritime Batteries are based on patented immersion cooling technology which fully immerses the cells, including busbars, in a non-flammable fluid, ensuring unique temperature control and homogeneity across the battery. They deliver:
-High performance (up to 8C power output)
-Certified safety
-Compact size & lower weight (/4) reducing vessel energy consumption
-Fast charging (<15 min) 
-Battery life (4x)
-Modular design making integration into vessels simple and flexible
-Recycling

WATTALPS Maritime Battery Packs

Immersion cooling maritime battery packs certified by Bureau Veritas with Marine Type Approval, for hybrid or full electric vessels.

General presentation of WATTALPS patented immersion cooling technology.

Stack WATTALPS with logo.jpg

WATTALPS Li-ion battery with patented immersion cooling technology

High-performance Li-Ion batteries with patented immersion cooling technology.
Outstanding thermal management efficiency, immersion cooling provides a high level of passive safety against thermal runaway propagation.
In-house designed BMS guarantees best-in-class functional safety.
Dielectric fluid biodegradable, non-toxic and non-flammable.
Battery pack including connections, rated IP67 / IP69K.
Marine certification in process, IEC62619, ISO26262, R10, UN38.3 and R100rev.3 already completed.

Li-ion battery packs with patented immersion cooling technology.

High-performance Li-Ion batteries with patented immersion cooling technology, ranging from 48V up to 800V and 10 kWh up to 500 kWh

kyoTfeXC5m4

wECM79Da4YE

Safety and Security AWARD-Euromaritime2026

A panel of maritime experts evaluated nearly forty candidates, and awarded five prizes, with WATTALPS winning the one dedicated to safety and security at sea.
The distinction, which recognizes recent progress in maritime battery safety, highlights WATTALPS’ innovative and safe battery solutions for the maritime sector.

Advanced batteries - Immersion cooling technology

i5Sp1EXFIT0

Tenair

Datalayers

<noscript><iframe src="https://www.googletagmanager.com/ns.html?id=${key}"
height="0" width="0" style="display:none;visibility:hidden"></iframe></noscript>

Google Tag Manager

Preference center

Cookie Bot

Log in to add this article to your reading list

Would you like to read this article again later?

Metstrade 2026

Delete Account

As soon as codes are available for this participation, they will appear here. You can then filter, copy, share and export them.

No invitation codes are available yet

Messages

The table below shows the Banner Name(s) that will appear on your stand(s). This name was provided during registration and may differ from the company name in your Company Profile. Changing your company name in the profile does not affect your Banner Name. 
If you wish to change your Banner Name, please contact Account Support.

We are working on creating more insights regarding the stands at RAI. Please visit the FAQ for more information about this topic.

WATTALPS Receives Euromaritime Award for Safety & Security at Sea

Newsletter

Organised by

Powered by

Endorsed by

Member of

Flagship event

Strategic partner