Bosch Engineering has introduced the electric drive for marine applications (EDM), a complete high-voltage electrification system designed to reduce the engineering complexity of integrating electric inboard motors into recreational boats and commercial vessels. The turnkey solution targets shipbuilders, system integrators, and naval architects seeking standardized electric propulsion systems.
Highlights
- Complete system integration: Ready-to-install inboard motor combines electric motor, gearbox, inverter, on-board charger, heat exchanger, control unit, and cooling pumps in a single 180 kg unit
- Power specifications: Delivers 160 hp continuous power with 0.7 kW/kg power density; scalable to twin-drive configuration for higher output requirements
- Flexible battery compatibility: Standardized communication interface supports various high-voltage battery systems; integrated charger simplifies E/E architecture integration
- Automotive-grade components: System leverages Bosch’s passenger car and commercial vehicle production standards and quality protocols
System Specifications and Architecture
The EDM operates as a ready-to-install inboard motor integrating multiple propulsion and power management components. The system includes high- and low-voltage cabling, charger inlet, cockpit display, and control elements. At 180 kg with 160 hp continuous output, the unit achieves a power density of approximately 0.7 kW/kg.
For vessels requiring additional propulsion capacity, two EDM units can operate in a twin-drive configuration with dual propellers. According to Philipp Kurek, who oversees off-highway and maritime solutions at Bosch Engineering, the system provides “a simple and efficient means of electrification using a clean, quiet, yet powerful drive.”
Integration and Installation Flexibility
The EDM’s installation dimensions match those of combustion inboard engines with equivalent power output. This dimensional compatibility enables integration into existing hull designs or retrofit applications without significant structural modifications.
A modular variant is available for space-constrained installations. This configuration delivers inboard components separately rather than preassembled, allowing flexible positioning within the engine compartment.
Thermal Management and Battery Integration
The EDM’s thermal management system provides cooling for integrated drive components and temperature control for high-voltage batteries. Bosch Engineering does not supply batteries with the EDM but recommends compatible solutions based on customer requirements and available installation space.
The system’s standardized communication interface ensures software compatibility with multiple high-voltage battery manufacturers. Battery charging occurs through the EDM’s integrated on-board charger.
Diagnostic and connectivity features include:
- Drive-related information and travel data visualization on supplied display
- Intelligent system responses to component failures or faults
- Guided troubleshooting via diagnostic device
- Optional cellular network connectivity for over-the-air software updates and drive parameter monitoring
Support Services and Future Development
Bosch Engineering provides technical support from initial installation concept through drive commissioning. The company applies expertise from automotive electrification and marine motorization to the EDM program. System components originate from Bosch’s automotive production facilities and meet passenger car and commercial vehicle quality standards.
Beyond the EDM, Bosch Engineering offers the electric drive system platform (EDSP) for maritime electrification. The EDSP provides modular solutions allowing individual combination of drive components including electric motors, gearboxes, inverters, and control units. Components are available as separate modules for shipbuilders performing self-directed electrification projects.
Bosch Engineering plans to expand the EDM solution to additional performance classes for larger and heavier marine applications.
The electric drive for marine applications will debut at METSTRADE in Hall 7, Stand 07.218.
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