Wind-Assist • Route-Weighted Fuel Saving • Auxiliary Penalty • CAPEX • NPV • IRR • FuelEU Wind Reward Reference
Wind-Assisted Propulsion ROI & Payback Calculator
Screen the economics of rotor sails, rigid sails, suction wings, soft sails, kites and other WAPS technologies using vessel-specific fuel demand, route wind exposure, system availability, auxiliary power, bunker prices, carbon value, retrofit cost and recurring OPEX. Advanced mode separates favorable-wind performance from route utilization and shows how fuel-price or wind-performance downside changes the investment case.
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Need route exposure, system availability, auxiliary power or FuelEU wind reference? Click Advanced above.Simple uses a net annual fuel-saving percentage. Advanced separates gross favorable-wind performance from actual route utilization, availability and auxiliary fuel penalty.ReturnPayback, NPV & IRR
FuelAnnual MT saved & value
RiskBreak-even bunker price
Fuel & Commercial Value
MT/year propulsion-fuel baseline.
% after all route/availability/auxiliary effects.
$/MT.
%/year.
$/tCO₂ applied to avoided fuel emissions.
% of avoided CO₂ receiving entered value.
Project Economics
$ total installed project cost.
$/year.
Years.
% nominal planning rate.
WAPS Technology & Route Performance
Use route study, vendor model, trial result or owner engineering data. The tool does not assign one universal savings percentage to any WAPS technology.
MT/day.
% propulsion-fuel reduction during favorable conditions.
% of sea time with useful wind contribution.
% of theoretically useful time the system is available.
%/year reduction in net fuel saving.
Auxiliary Energy Penalty
kW while system is active. Enter 0 if negligible.
g/kWh for auxiliary power.
Fuel, Carbon & Other Commercial Value
$/MT.
tCO₂/MT fuel.
$/tCO₂.
%.
$/year. Do not double count fuel or carbon savings.
Retrofit CAPEX
% of pre-contingency CAPEX.
days.
$/day.
Annual WAPS OPEX & Opportunity Cost
Annual deck/cargo/port interference value.
Lifecycle & FuelEU Wind Reference
kW available effective wind power.
kW propulsion-power reference for screening ratio.
Project Readiness
Advanced Stress Cases
Stress the commercial case without changing the base inputs. Performance multiplier applies to net wind fuel saving before cash valuation.
| Case | Fuel price × | Wind performance × | CAPEX × | OPEX × |
|---|
Planning estimate only: WAPS performance is strongly vessel-, route-, weather-, speed- and technology-dependent. Use route-specific wind data, verified vendor/independent modelling and measured operating data where available. FuelEU wind reward display is a screening reference only and does not calculate certified PWind or an official FuelEU result.