DC Distribution, Power Electronics, ESS Integration & Marine Electrification Economics

Marine DC Grid Retrofit, Converter Capacity, Efficiency & Electrification ROI Tool

Screen a retrofit from conventional AC distribution toward a shipboard DC grid. Size DC-bus current and converter capacity, map AC/DC, DC/DC and DC/AC power paths, quantify conversion losses, test reserve and critical-load capacity, compare the proposed electrical-chain efficiency with the existing plant, and calculate avoided generator energy, fuel savings, electrification value, payback and lifecycle ROI.

Currency
Currency selector changes display only. No exchange-rate conversion is performed.

Vessel Electrical Mission

Use measured or design-basis electrical loads where possible. DC-grid value depends heavily on the actual conversion chain, operating profile, battery / fuel-cell integration, converter loading and whether transformers or repeated AC/DC conversion stages can really be removed.

years
kW
kW
h/year
kW
%
Enter the effective source-to-useful-load efficiency of the electrical conversion / distribution chain you are replacing, not engine thermal efficiency.
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DC Bus Capacity & Survivability

V DC
A
%
kW
Enter the actual post-isolation source / bus capacity available to critical loads.
kW
The tool also calculates V × A / 1000 and uses the lower capacity as the screening bus limit.

Source-Side DC Integration

Source shares should total 100%. Direct DC sources represent sources connected without the modeled AC/DC or DC/DC stage.

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kW
kW

Load-Side DC Integration

Load shares should total 100%. Direct DC loads represent equipment that can consume the bus supply without the modeled inverter or DC/DC stage.

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kW
kW

Simple Converter CAPEX

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Power-Electronic Converter Register

Each row represents a converter stage or parallel converter bank. Average throughput and annual hours drive losses. Peak transfer versus total installed rating drives capacity. If power passes through two conversion stages, include both rows so both losses are captured.

Converter / bank Role Type Qty Rating each kW Peak transfer kW Avg transfer kW h/yr Efficiency % CAPEX each Maint each / yr

Retrofit Economics

g/kWh
$ / t
tCO₂ / t fuel
$ / tCO₂
$ / year
%
%
years

Shared DC Grid Retrofit Cost

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days
$ / day
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Optional one-time value for electrification work that the DC architecture is expected to avoid or simplify later.
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%

DC Grid Engineering Readiness

Screening tool, not electrical system design: This calculator does not perform DC short-circuit, arc-energy, converter fault-current, protection selectivity, busbar thermal, cable, harmonic, EMC, insulation-coordination, common-mode, earthing, battery safety, dynamic stability or class-approval calculations. Final marine DC-grid design must use the applicable IEC 60092 requirements, class / flag rules, converter OEM data and vessel-specific system studies.
Reference framework: Marine DC distribution uses power-electronic converters and a protection / control philosophy that can differ materially from a conventional AC switchboard architecture. Relevant project references can include the IEC 60092 series for shipboard electrical installations, semiconductor converters and electric propulsion, class-specific DC distribution requirements, converter certification requirements and vessel-specific protection studies. Verify the edition and rule basis applicable to the ship before final design.
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