If you charge or store lithium-ion batteries on a yacht or commercial vessel, uncertified “fireproof” boxes aren’t enough.
LiVault delivers RI.SE & DMT (TÜV NORD GROUP) tested containment and Lloyd’s Register-appraised marine systems, integrated toxic-gas filtration, blast/overpressure relief, and active monitoring, purpose-built for MGN 681style requirements.
Detect → Contain → Cool → Filter → Alert
(Home – Leisure – Commercial)
Use cases: e-bikes, e-scooters, power tools, damaged batteries—at home, in workshops, in vans, or in technical spaces.
(Marine: yachts, day boats)
Use cases: e-foils, drone batteries, water toy battery packs
(Superyacht & Commercial Marine)
Use cases: e-foils, Seabobs and larger batteries. Service worldwide; periodic onboard maintenance available.
Still common but risky on vessels:
LiVault’s marine guidance details these pitfalls and why only certified, purpose-built boxes should be used onboard.
Li-ion fires produce toxic by-products and explosive pressure waves; containment + filtration + monitoring are the controls that align with marine guidance.
| Solution | Gas Capture | Blast/Overpressure | Active Monitoring | Marine Rating | Independent Validation |
|---|---|---|---|---|---|
| LiVault RACLAN / RAMBSS | Toxic-gas filtration | Engineered overpressure relief | Temp + smoke/gas with auto cooling | Yes (watertight modules, yacht installations) | DMT–TÜV Nord testing; RAMBSS LR DAD |
| Fire blankets / bags | ❌ | ❌ | ❌ | Not specific | None stated |
| Generic flammable-liquid cabinet | ❌ (not for Li-ion gases) | ❌ | ❌ | Not marine | None stated |
| Unprotected Charging | ❌ | ❌ | ❌ | ❌ | ❌ |
LiVault systems map to the control measures outlined in MGN 681 (M), often exceeding them in areas like containment, monitoring, and exhaust.
Marine insurers and clubs are aligning with MGN 681 principles. RAMBSS has been validated under Lloyd’s protocols, with the D.A.D. stating: “A verified container as part of an arrangement to MCA MGN681 (M)”.
Recent Underwriters Clause: “ any Lithium Battery […] shall only be charged in a Container, or within a space meeting the requirements of Section 14.1 of the REG Yacht Code or on open deck where the risk of fire and accumulation of toxic gas is minimized”
| MGN 681 (M) Section | Requirement | How We Comply |
|---|---|---|
| Section 4.2 | “…should be stored in a dedicated cabinet or locker constructed according to a recognised international standard including but not limited to EN 14470, EN 16121 and EN 16122, or an approved dedicated battery storage and charging cabinet or locker…” |
RACLAN Square Marine Box: Tested under TÜV NORD DMT Test Programme M02/22. RAMBSS:
|
| Section 4.10 | “A means to monitor the temperature of these spaces should be included with integration into the ships alarms and control system where practical” |
All marine systems can integrate with the vessel’s Alarm Monitoring and Control System (AMCS). RACLAN Square Marine Box: Optional AMCS connection. RAMBSS: AMCS connection and visual display provided as standard. |
| Section 4.12.1 | “Charging activities to take place while the charging cabinet is closed.” | Integrated internal sockets enable charging within the enclosure. Door lock sensors ensure charging can only occur when the door is closed and both locks fully engaged. |
| Section 4.12.2 | “Detection of temperature rise inside the cabinet and indication that there is an over temperature event.” | Intelligent thermal management system with visual and audible alerts, and automatic charging shutdown on fault detection. |
| Section 4.12.3 | “A suitable extinguishing medium to be applied to the battery in the event of a battery fire without opening the cabinet.” | Multi-nozzle cooling spray system using TRIDENT cooling agent |
| Section 4.12.4 | “Venting of off-gases to prevent overpressure and a build-up of explosive gases.” | High-efficiency exhaust system with multi-stage filtration for gas cooling and scrubbing of explosive, flammable and toxic gas including H2, Hf and VOC. |
| Section 4.13 | “Any charging cabinet should be suitably insulated to prevent spread of fire from any battery fire and should be constructed such that it provides suitable protection from explosion.” | Fire-resistant enclosure with ballistic, explosion-resistant construction, designed to contain thermal runaway and manage blast pressure. |
| Section 4.13.1 | “Charging should be automatically stopped if any fault or overheating is detected.” |
RACLAN Square Marine Box: Automatic power isolation on temperature detection with immediate shutdown of charging. RAMBSS: Automatic power isolation on temperature rise or smoke detection with immediate shutdown of charging. |
| Section 4.14 | “Storage or charging cabinets or boxes should have a maximum capacity limit (in kWh) that must not be exceeded.” |
Systems are designed and tested with defined maximum capacity limits: RACLAN Square Marine Box: up to 3.5 kWh RAMBSS: up to 5.25 kWh |
| Section 5.1 | Product Type Approval required before 1st January 2027. |
RACLAN Square Marine Box: Anticipated before deadline. RAMBSS: Lloyd’s Register Type Approval currently in progress. |
| Feature | How We Exceed |
|---|---|
| Pre-emptive Detection | Early detection using temperature and infrared smoke detectors, triggering automatic isolation of the charging system and immediate cooling on early detection of thermal runaway. |
| VOC (Volatile Organic Compounds) | An integrated VOC adsorbent in RAMBSS removes contaminants and volatile organic compounds typically produced during thermal runaway. |
| Gas management with EXO-Filter System | A patented multi-stage EXO filtration system removes hydrogen (H2), HF, and VOCs. The EXO-Filter also provides cooling, reducing off-gas temperature to below 100°C, ensuring gases released are non-toxic, non-flammable, and non-explosive. |
| Full submersion cooling | The RAMBSS system completely floods the enclosure with TRIDENT coolant and fresh water, fully submerging batteries to stop thermal runaway propagation. |
| Double-walled construction | All systems are constructed with non-combustible and ballistic panels. RAMBSS incorporates an additional internal layer of FIPRO non-combustible panels, MED and Bureau Veritas approved, offering fire performance equivalent to A1 classification and compliant with SOLAS fire safety requirements and IMO 2010 FTP Code (Annex 1 Part 1 – non-combustibility test). |
| Frame-in-frame design | Structural frame-within-frame construction using aluminium profiles, reinforced with concealed stainless steel rods. This significantly enhances resistance to external fire exposure and maintains enclosure integrity under explosion conditions. |
| Designed for marine | System engineered specifically for marine environments, including resistance to salt air, moisture, vibration, and continuous operation. |
| Certifications and why not EN 14470 | EN 14470 is not applicable to lithium battery risks, as it covers only liquids and gases with passive fire resistance. RAMBSS and RACLAN Square Marine Box systems instead use UL 1487 and TÜV NORD M02/22 to address thermal runaway, gas generation, and active mitigation. All systems are tested and certified for fire, explosion, and gas hazards. |
| Air circulation during charging | Active ventilation in RAMBSS maintains controlled internal temperature during charging while safely managing gas extraction through filtration. |
| Designed for explosion | All systems are specifically engineered for explosion resistance, with testing demonstrating internal pressure peaks of up to 7.2 bar without structural failure. |
| Internal component redundancy | Critical components, pumps, relays, etc., are backed up with redundancy components. |
| Alarm System Integration (AMCS) | Integrated with vessel AMCS, providing real-time alarms. |
| Fail-safe operation | Internal backup battery maintains monitoring, alarms, and suppression capability for extended periods (up to 90 days). |
| Visual display | RAMBSS is equipped with a visual display to give real time internal temperature and alerts. |
LiVault RACLAN systems have been independently tested (DMT, TÜV NORD GROUP) according to the test program for storage means for lithium-ion batteries (TÜV NORD CERT test program no.: M02/22). RAMBSS carries a Lloyd’s Register Design Appraisal (DAD) for Storage and charging Li-Ion batteries on board of large Yachts. It is cited as: A verified container as part of an arrangement compliant to MGN 681 (M), document number TSO-24-013730-F01-DA.
No. EN 14470 – Fire safety storage cabinets – Part 1: Safety storage cabinets for flammable-liquids are designed to prevent existing fires outside the cabinet from igniting the flammable contents. They are for land use and don’t cover marine dynamics or lithium-ion thermal-runaway gases. At sea, a marine-approved lithium battery system with sealed containment, overpressure relief, toxic-gas (incl. HF) filtration, and forced extraction to open air should be used.
Toxic gases are forced through a flow path of multi-stage media to treat gases such as Hydrogen and Hydrogen Floride (HF). Testing showed a maximum HF Concentration < 95 ppm and an HF Concentration in 15 min Interval < 34 ppm.
Yes. The essence of our systems is active monitoring of the batteries as they charge. If the system detects a rise in temperature it immediately cuts the power to charging. If the temperature continues to rise it starts to spray the Trident cooling agent to slow thermal runaway. On all systems a loud audible and visual alarm will sound. In RAMBSS systems the connection to the AMCS will generate an alarm in the vessel’s systems.
Sensors trigger alarms, cut power, and deploy TRIDENT agent to slow propagation; exhaust is routed through filters to neutralize toxic and explosive gases before release.
Yes. LiVault systems are designed for internal, monitored charging with integrated sockets and safety interlocks.
Yes. Choose RACLAN for smaller packs and E-Foil batteries and RAMBSS modules for larger water toys and Seabobs.
MGN 681 calls for controls around charging, stowage, and dedicated spaces; LiVault’s unique containment, monitoring, and exhaust features address those elements and exceed them in many areas.
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