Berth Load • Shore Tariff • Generator SFOC • Demand Charges • Grid Emissions • Carbon Cost • Retrofit Payback • Break-Even Rate
Shore Power vs Ship Generator Cost, Fuel & Emissions Tool
Compare shore electricity with onboard auxiliary generation on a true per-port-call basis. Screen purchased shore energy, generator fuel burn, fixed and demand charges, retained generator load, carbon cost, annual savings, CO₂e reduction, break-even electricity price and optional shore-power retrofit payback.
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Need peak-demand charges, conversion losses, partial shore coverage, retained gensets, carbon cost or retrofit payback? Click Advanced above.Simple compares the full berth electrical demand with either shore electricity or onboard generation using ten commercial inputs.CostPer call & annual savings
FuelGenerator MT avoided
EmissionsCO₂e difference
Berth Electrical Demand
kW average ship demand while connected.
Hours per comparable port call.
Shore Power
Currency/kWh purchased.
kg CO₂e/kWh. Use the applicable supplier/grid factor.
Onboard Generator
g/kWh at the relevant load.
Currency/MT.
Currency/hour while generator is operating.
tCO₂ per MT fuel. Replace with the applicable fuel factor.
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Advanced compares the actual shore-connected operating state with the all-generator baseline.It can retain part of the auxiliary generator load, include conversion losses, peak demand charges, separate carbon prices, retrofit CAPEX, scenario stress and shore-connection readiness.Berth Electrical Profile
kW.
kW used for demand and apparent-power screens.
Hours/call.
% from metered shore input to ship bus.
Used for apparent-power connection screen.
% of average/peak electrical demand intended for shore supply.
kW retained onboard for operational or redundancy reasons.
Shore Electricity Tariff & Emissions
Currency/kWh purchased.
Currency/kW allocated to this call. Convert monthly or ratcheted tariffs to the applicable call-level allocation.
Currency/call.
kg CO₂e/kWh purchased.
Currency/tCO₂e. Use 0 when already embedded in tariff.
Onboard Generator Baseline
g/kWh at the modeled berth load.
Currency/MT.
Currency/hour when generator is operating.
tCO₂/MT fuel.
Currency/tCO₂e. Set 0 when no direct carbon cost applies.
Optional Vessel Shore-Power Investment
Years.
%.
Economic Stress Cases
Each case independently changes the core economics. Labels are categorical so no port, vessel or customer names are needed.
| Case type | Shore rate % | Fuel price % | Demand charge % | Grid EF % | Calls % |
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Connection Readiness
Engineering / commercial limitation: this is a planning screen, not an electrical design or tariff invoice. Actual shore-power economics depend on utility metering, monthly or ratcheted demand charges, minimum bills, port fees, generator loading and SFOC, retained spinning generation, transformer/frequency-converter losses, local grid emissions, carbon rules and connection compatibility. Verify the actual port tariff and approved ship/shore connection arrangement.