Compare baseline genset fuel use with optimized hybrid
dispatch and battery charging losses
Lifecycle Economics
Model CAPEX, shore charging, battery replacement,
payback, NPV and IRR
Vessel Electrical Load
Enter the vessel electrical demand and the battery duty
required for peak shaving or hybrid load leveling.
kW
hours/day
days/year
%
Battery Duty & Sizing
kW
minutes
cycles/day
%
%
%
%
Generator & Charging Economics
Battery cycling alone does not automatically reduce fuel.
The model credits lower optimized generator SFOC and any
energy supplied from shore while including battery charging losses.
g/kWh
g/kWh
$
/MT
tCO2/MT
$
/MWh
%
$
/kWh
kg/kWh
$
/tCO2
%
Battery CAPEX & Lifecycle
$
/kWh
$
$
/year
year
Enter 0 to exclude battery replacement in Simple mode.
% battery CAPEX
years
%
%/year
%/year
%/year
%/year
Vessel & Battery Duty
Advanced mode sizes the battery for end-of-life capacity,
module rounding, power reserve and C-rate while estimating
equivalent-full-cycle and calendar replacement timing.
kW
hours/day
days/year
%
kW
minutes
cycles/day
%
%
%
%
%
C
kWh/module
Enter 0 to disable module rounding.
Battery Aging & Replacement
EFC
Equivalent full cycles at the entered design duty.
years
%/year
% initial pack
%/year
Generator Optimization
g/kWh
g/kWh
$
/MT
tCO2/MT
$
/MWh
Shore Charging & Carbon
%
$
/kWh
kg/kWh
$
/tCO2
%
Battery Hybrid CAPEX
$
/kWh
$
/kW
$
$
$
$
$
%
days
$
/day
$
Lifecycle Economics
$
/year
years
%
%/year
%/year
%/year
%/year
$
Battery Hybrid ROI & Sizing Results
Simple marine hybrid investment screen
Enter battery data
Enter vessel load, battery duty, generator fuel-consumption
assumptions and battery system cost to calculate marine
battery sizing and hybrid ROI.
Required Battery Capacity
N/A
Nominal installed battery energy required for the
entered duty, DoD and sizing reserve
Annual Net Benefit
N/A
Fuel, maintenance and carbon value after shore
charging and battery operating costs
Required Battery Power
N/A
Energy / Discharge Event
N/A
Design C-Rate
N/A
Annual Battery Discharge
N/A
Shore Charging Energy
N/A
Net Fuel Saved
N/A
CO2 Avoided
N/A
Year 1 Fuel Savings
N/A
Installed Project Cost
N/A
Simple Payback
N/A
Project NPV
N/A
Internal Rate of Return
N/A
Lifetime ROI
N/A
Break-Even Fuel Price
N/A
Break-Even Shore Rate
N/A
Battery Replacement Interval
N/A
Levelized Net Cost / Discharged MWh
N/A
Year 1 Hybrid Savings Breakdown
Battery Hybrid Investment Summary
Battery Energy & Generator Balance
Annual operating case
Metric
Result
Lifecycle Cash Flow
Replacement and escalation included
Year
Fuel Savings
Gen Maint.
Shore Cost
Battery OPEX
Replacement
Carbon Value
Net Cash
Discounted
Cumulative PV
Battery Hybrid ROI Sensitivity
Battery dispatch vs fuel price
Battery Dispatch \ Fuel Price
-20%
Base
+20%
Battery-hybrid estimate ready:
project guidance will appear after calculation.
Model approach:
required battery energy equals discharge power multiplied
by discharge duration, adjusted for usable depth of discharge,
end-of-life capacity and sizing reserve. Battery charging
energy includes round-trip losses. The charging requirement
is split between shore electricity and onboard generators.
Baseline generator fuel is calculated from total vessel
electrical demand and baseline SFOC. Hybrid fuel is calculated
from the remaining generator energy plus onboard battery charging
using the optimized hybrid SFOC. Advanced mode also estimates
battery replacement timing from equivalent full cycles,
calendar life and capacity degradation.
Planning estimate only.
Actual marine battery-system sizing and economics depend on
battery chemistry, cell and module configuration, maximum charge
and discharge power, thermal management, state-of-charge limits,
redundancy, reserve requirements, fire detection and suppression,
ventilation, vessel electrical architecture, converter performance,
generator dispatch, battery-management strategy, degradation,
shore-power availability and the vessel operating profile.
Battery cycling does not inherently save fuel. Savings generally
depend on generator-load optimization, peak shaving, spinning-reserve
reduction, shore charging or other vessel-specific operating benefits.
Use supplier, integrator, class and vessel-specific engineering data
before an investment decision.
