Inland Barge NW-5 Battery Swap Economics

Diesel vs Battery Swap (LFP + Solar) — 28-Year Comparison

Inputs

Vessel & Cargo

Size (L×B×D×T)

Cargo capacity (t)

Speed-Power Curve (BP kW @ speed)

5 kn

6 kn

7 kn

8 kn

9 kn

10 kn

Operating Speeds

Max speed (kn)

Cruise speed (kn)

Manoeuv speed (kn)

Route (fixed)

Voyage distance (km)

No. of swap stops

Commercial

Cargo rate (₹/t-km)

Fleet size

Utilisation

Revenue growth /yr

Financial

Discount rate

Crew

Crew cost/day (₹)

Crew cost increase /yr

Motor & Powertrain

Motor efficiency

No. of powertrains

Power at jetty (kW)

CAPEX (₹)

Vessel hull (Cr)

Diesel powertrain + FO (Cr)

Electric powertrain (Cr)

Battery original (₹/kWh)

Battery replacement (₹/kWh)

Pack ratio (:barges)

Battery Technical

Prop battery DoD

Aux battery DoD

Size buffer (degradation)

Rated cycles

Solar

Solar plant (kW)

Solar yield (kWh/kW/day)

Operating Times

Operating days/yr

Manoeuv distance (km)

Swap time (min)

Fast-charge time (min)

Cargo handling time (min)

Aux Power Loads (kW)

Air-con (Diesel)

Air-con (BS)

Battery cooling (BS)

Other loads

Diesel Properties

Diesel price (₹/L)

SFC at cruise (g/kWh)

SFC at manoeuv (g/kWh)

Aux SFC (g/kWh)

Diesel density (kg/m³)

CO₂ per litre (kg)

Idling FOC fraction

Electricity Properties

Grid tariff (₹/kWh)

Grid CO₂ (kg/kWh)

OPEX %

Diesel maint %

BS maint %

Insurance %CAPEX

OPEX escalation diesel /yr

OPEX escalation electric /yr

Other

Project horizon (yrs)

Battery replacement (yrs)

Scrap % of hull

Crew (advanced)

No. of crew

Sets of crew

Crew days/yr

Lite shows essential parameters. Switch to Full for full control.

Voyage Time

Energy (Battery Swap, per voyage)

Battery Sizing

Diesel Fuel

Annual Costs (Year 1)

Scrap Value

Each row shows the derivation. Change inputs on the left to see how values cascade through the system into the Financial tab.

TCO Breakdown (PV, Cr INR)

TCO Components — PV by Category

TCO PV — Side-by-Side with Components

Cumulative TCO (Nominal)

Voyage Profile

Battery Pack Sizing

Battery Pack Rotation — 6 Barges × 9 Packs (hourly)

Each cell shows which pack (B1-B9) is on which barge at each hour. Yellow = cargo discharge, grey = swap or barge not yet launched/done. Same pack color = same physical battery rotating through the fleet.

Cargo Rate Sensitivity

Diesel Price × Discount Rate

Lifecycle Emissions

Diesel — Year-by-Year Cash Flow (Cr INR)

Battery Swap — Year-by-Year Cash Flow (Cr INR)

PV/NPV column uses your discount rate. Cumulative row shows nominal running balance. Mirrors the TCO and NPV sheet in the Excel model.