Quiet. Clean. Green.
Thailand Waterways Deserve Better Than Diesel.
SilentC replaces the roaring, polluting combustion engines in Thailand's iconic Longtail Boats with a solar-powered electric propulsion system. The result: cleaner sea parks and rivers, healthier operators, and a business case that actually makes sense.
Zero Emissions
No exhaust fumes, no oil leaks, no noise. Our system protects Thailand's marine ecosystems.
Saves You Money
Cut your monthly fuel and maintenance bill by Thousands of THB. Save from day one.
State-of-the-Art Tech
Designed by qualified Thai engineers collaborating with an experienced global team.
Engineering a New Standard
Our team represents Thailand’s new generation of educated engineers, strengthened by experienced international technology and business professionals.
A. The Electric Motor
High-torque, saltwater-resistant, optimized for the long-shaft mechanics of Thai Longtail boats. Instant torque. No vibration. No fumes.
B. The SilentC Controller (BCU)
The BCU is the boat’s “computer”: connecting and managing all components to ensure safe and efficient operation, even in extreme tropical conditions.
C. Advanced Battery Technology
Stable LiFePO4 technology engineered for long service life and peak performance in tropical heat.
D. The SilentC App & Connectivity
Real-time battery monitoring, usage analytics, route logging and GPS data for complete operational visibility.
The Complete Electric Retrofit.
Upgrade your boat with SilentC. We modernize traditional longtail boats by replacing outdated diesel engines with a fully integrated, high-efficiency electric propulsion system. Our solution creates a cohesive operating environment; connecting battery, controls, connectivity, and safety systems into one seamless, professional-grade platform.
One SupplierOne coordinated system from engineering to delivery.
Ready to OperateProfessionally assembled, tested and supported.
Products Built Around the Complete Boat
A coordinated product portfolio—from the boat and propulsion to energy, control and connected operations.
Complete Electric Retrofit System
A precision-engineered electric upgrade delivered as one integrated operating system.
- Designed for existing hulls
- Integrated electric propulsion
- Tested and ready to operate
Electric Propulsion System
High-torque marine drive engineered for Thai longtail operation and tropical conditions.
- Electric motor and long-shaft drive
- Precision BCU control
- Reverse and braking capability
Energy & Charging System
Stable LiFePO4 energy storage with intelligent monitoring and a matched charging solution.
- Battery and smart BMS
- Thermal and electrical protection
- Charging solution
SilentC Connect
Connected monitoring for operators and fleet managers through app, GPS and operating data.
- Real-time battery monitoring
- GPS and route logging
- Usage and fleet visibility
Packages for Every Stage of Operation
Choose a coordinated package, then let our engineering team tailor the configuration to your route, load and operating profile.
Essential Boat
A complete electric propulsion system for straightforward daily operation.
- All-in-one electric drive unit
- Battery and charging system
- BCU and core safety protections
- Delivery and operator orientation
Professional Boat
Enhanced control, connected monitoring and support for commercial operators.
- Everything in Essential Boat
- SilentC App and GPS monitoring
- Usage analytics and route logging
- Enhanced commissioning and support
Fleet Package
A scalable package for tourism, transport, resorts, government and commercial fleets.
- Multiple boat configuration
- Fleet monitoring and GPS visibility
- Training and handover planning
- Service and support planning
Final configuration and commercial terms are tailored to the vessel, route and duty cycle.
News
Follow SilentC for company updates, project milestones and electric marine developments.
Jobs
Engineering, integration and prototype development for SilentC electric marine systems.
01
Propulsion Unit Engineering
A compact marine electric drive developed to deliver strong low-speed torque, efficient operation and dependable performance in tropical conditions.
02
Longtail Drive Integration
Mechanical and electrical interfaces are engineered around the long-shaft architecture to support installation, service access and practical daily use.
03
Operator Control System
A clear operator interface supports system status, controlled power delivery and safer handling for electric marine operation.
04
Prototype Boat Installation
The propulsion system has been installed on a working longtail boat platform to validate fitment, operating layout and real-world marine integration.
About Us
We Didn't Come Here Just to Sell Motors
Our Purpose
Thailand's Longtail boat is more than transport — it's a cultural institution. SilentC exists to preserve that heritage while building a profitable, sustainable future.
Our 2027 Commitment
We are targeting the removal of 50,000+ tons of CO₂ from Thai waterways by 2027. Every boat we convert is a measurable step toward Thailand's national goal of net-zero by 2065. Through our SilentC App and carbon data platform, we'll have verified impact data to qualify for Carbon Credits — turning environmental action into additional revenue for operators.
The Team
Ranni Vardi
President & Co-Founder
Serial entrepreneur, 30+ years. Founder of Netposition, inventor at Sensight, and CEO of Yamit Mil.
Doron Kedem
BD Director & Co-Founder
Mobile technology executive with global experience building startups to IPO in telematics, IoT, and risk management.
Piyachot Chaiyachot
Chief Operating Officer (COO)
a Master’s degree in Project Management from the University of Northampton, UK, and more than 10 years of global management experience.
Dr. Ekarin Vasanasong
Advisory Board Chairman
Ph.D. Electrical Engineering, University of New South Wales. 13+ years in Thailand's energy sector.
Mongkol Kaewprasoet
Mechanic Engineer
Graduated with a Bachelor of Science in Nautical Science from Burapha University, backed by 3+ years of sea-going experience aboard cargo vessels.
Amonnat Witchuwaskamin
Electrical Engineer
Bachelor of Engineering : Smart Electrical Energy Engineering at Pathumwan Institute of Technology, 5+ year of Solar Energy and Project Coordination.
Satsawat Nitisatyothin
Software Engineer
Graduated with a Master's degree in Robotics and Automation from the Institute of Field Robotics (FIBO), King Mongkut's University of Technology Thonburi (KMUTT).
Rattana Chomdokmai
Marketing
Graduated with a Bachelor of Accountancy from Kasem Bundit University, Bangkok
Contact Us
Ready to lead the transition? Tell us about your boat or fleet.
Silent C Ltd. (Head office)
45/2 Room 3B Kanchanaphisek Road, Dokmai Subdistrict, Prawet District, Bangkok 10250, Thailand
Tax ID: 0105567111401
Telephone: 02-077-4248
Email: info@silentc.co.th