# Marine Electrification Feasibility: Environmental & Economic
> A deep dive into the feasibility of full electric propulsion for the Marcel Carné vessel, covering technical sizing, CO2 impact, CAPEX, and OPEX.

Tags: marine-electrification, electric-propulsion, battery-sizing, feasibility-study, co2-reduction, lifepo4, maritime-sustainability
## Marine Electrification System: Marcel Carné Feasibility Study

*   **System Architecture**: Transitioning to fully electric propulsion using an Energy Storage System (ESS/Battery) and inverters to drive AC electric motors, eliminating local emissions.

## Operational Energy Demand & Sizing

*   **Daily Energy Requirement**: Calculated at 209 kWh for a worst-case scenario (high traffic) on a Seine River loop.
*   **Battery Sizing**: To provide 209 kWh with 95% efficiency and maintain a 30%–90% State of Charge (SOC) window for battery longevity, a 380 kWh nominal capacity is required.
*   **Redundancy**: The capacity is split between two independent propulsion lines (Port & Starboard) for twin-screw reliability.

## Charging Strategy & Technical Specs

*   **Charging**: Overnight charging (30-60 kW) was selected over opportunity charging to reduce thermal stress and infrastructure costs.
*   **Battery Specs**: LiFePO4 technology with a mass of 1.9 – 3.5 tonnes and a cycle life of 2,000 – 7,000 cycles (~12.5 years).

## Environmental & Financial Impact

*   **Emissions**: 89% reduction in daily carbon footprint, dropping from 96.5 kg to 10.5 kg CO2-eq.
*   **CAPEX**: Total investment estimated at ~€250k (€133k for batteries, €67k for propulsion components, and €50k for infrastructure).
*   **OPEX**: Annual energy costs estimated at ~€13,300 based on French business electricity rates (~€0.16–0.19/kWh).

## Conclusion

*   **Verdict**: While showing excellent environmental performance, the solution was **NOT SELECTED** for immediate implementation due to high CAPEX and integration constraints (weight/volume).
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