Tourist Submarine – Compact Electric System for Silent Underwater Navigation

Sector: Underwater Tourism / Special Marine Vehicles

End Client: Confidential
Project Summary
FACOS designed the electric drive and energy management system for a battery-powered tourist submarine, developed to offer passengers a silent and immersive underwater experience, in complete safety and with zero emissions.
The project required a high-reliability solution within extremely limited space.
Background
Tourist submarines require ultra-compact, silent, and fully reliable electronic systems capable of operating in extreme environmental conditions (pressure, humidity, no natural ventilation).
The client was looking for a technical partner capable of delivering a fully integrated system, suitable for extended duty cycles and easy system monitoring.
Client Requirements
- Fully electric, silent propulsion
- Compact layout to fit the internal hull structure
- Safe and intuitive user interface
- Reliable performance during dives and critical operations
- Continuous monitoring of battery and system status
FACOS Solution
The system was engineered to ensure maximum safety, compactness, and seamless integration, featuring:

NAUTY 900 → integrated brushless drive, BMS, and AC charger

BatteryPack LiFePO₄ – 48V / 100Ah → robust, self-heating lithium battery with high safety profile

EPM900 → smart energy management, DC-DC converter, and safety interlock system

CAN-bus monitoring and onboard interface with instant visual feedback
Key FACOS Technologies
- Zero-noise electric drive for underwater use
- High-safety LiFePO₄ BatteryPack
- Integrated electronics in a minimal footprint
- Remote diagnostics and real-time monitoring via CAN
Results Achieved
- ✅ Full-electric operation with zero underwater emissions
- ✅ Silent and secure underwater navigation
- ✅ Full system integration without structural modifications
- ✅ Enhanced passenger experience with no noise or vibration
Are you developing an electric or submersible vehicle for tourism or marine exploration?
FACOS develops compact, high-reliability electronic systems for special-purpose vehicles and extreme environments.