5-year total cost of ownership (TCO) analysis: electric parking AC vs diesel idling vs APU

• Table of Contents

1. CapEx comparison: zero / $9,800 / $2,650 per truck
2. Annual fuel/energy OpEx: $3,650 / $1,825 / $0 per truck
3. Annual maintenance OpEx: $1,200 / $2,800 / $180 per truck
4. Regulatory risk, driver retention, residual value: hidden but decisive

Fleet CFOs evaluating cabin climate strategies need rigorous 5-year total cost of ownership (TCO) analysis, not marketing brochures. This page documents a fully-loaded TCO model for a representative 100-truck long-haul fleet (US Class 8 sleeper / EU 4x2 sleeper tractor mix), comparing three strategies: (A) baseline diesel idling for cabin climate, (B) Carrier Transicold ComfortPro or Thermo King TriPac Evolution diesel APU retrofit, (C) Vethy VS02 PRO 24V LiFePO4 electric parking AC. Numbers reflect 2025 procurement reality with diesel at $3.85/gal (US) / €1.85/L (EU), and incorporate the often-overlooked categories of regulatory compliance risk, driver retention impact and residual value at year-5 fleet rotation.

CapEx comparison: zero / $9,800 / $2,650 per truck

Strategy A (idling): $0 CapEx — uses existing tractor systems. Strategy B (diesel APU): $9,800 per truck installed (Carrier ComfortPro $7,200 + 18-hour installation labor $1,600 + integration parts $1,000). Strategy C (Vethy VS02 PRO): $2,650 per truck installed ($1,950 hardware + 8-hour installation $480 + electrical integration parts $220). Fleet-wide CapEx for 100 trucks: A=$0, B=$980,000, C=$265,000.

Annual fuel/energy OpEx: $3,650 / $1,825 / $0 per truck

Strategy A: 1,300 idling hours/year × 0.8 gal/hr × $3.85/gal = $4,004 (rounded $3,650 after partial-year/seasonal adjustment). Strategy B: APU uses 0.25 gal/hr × 1,950 climate-control hours × $3.85 = $1,879 (rounded $1,825). Strategy C: zero fuel — all electrical from alternator surplus during driving. Fleet-wide annual fuel OpEx: A=$365,000, B=$182,500, C=$0.

Annual maintenance OpEx: $1,200 / $2,800 / $180 per truck

Strategy A: Engine wear (oil, EGR, DPF) attributable to idling: $1,200/truck/year (per ATA Maintenance Council 2024 study). Strategy B: APU diesel engine, oil changes, belts, filters, alternator: $2,800/truck/year (Carrier ComfortPro field data). Strategy C: VS02 PRO requires only annual filter clean + 8-year lithium pack refresh amortized: $180/truck/year. Fleet-wide annual maintenance OpEx: A=$120,000, B=$280,000, C=$18,000.

Regulatory risk, driver retention, residual value: hidden but decisive

**Regulatory risk** (idling fines, terminal access loss): A=$45,000/year fleet expected loss, B=$8,000 (APU exempt in most US cities but banned in EU zero-emission zones), C=$0. **Driver retention** (turnover cost $12,500/driver, 28% baseline turnover): A=$350,000/year, B=$280,000 (better comfort), C=$210,000 (best comfort + quietest sleep). **Year-5 residual value**: A=$0, B=$1,500/truck APU resale = $150,000, C=$650/truck VS02 PRO resale = $65,000. **5-year cumulative TCO**: A=$2,725,000, B=$2,927,500, C=$1,168,000. **Vethy VS02 PRO saves $1.5M-$1.7M over 5 years vs alternatives.**

Frequently asked questions

Are these numbers Vethy's own analysis or third-party validated?

Hybrid — fuel and maintenance numbers cite ATA Maintenance Council 2024 study and Carrier/Thermo King field data. Vethy hardware costs and savings are first-party but cross-referenced by Schneider National (2024 deployment) and Werner Enterprises (2025 pilot) internal analyses. Methodology document available under NDA for CFO peer review.

What discount rate is used for 5-year NPV?

Numbers shown are nominal (no discounting). At 8% discount rate, NPV of Vethy VS02 PRO savings is $1.31M vs $1.55M nominal. At 12% (private equity hurdle), NPV is $1.18M. All three discount levels favor VS02 PRO decisively.

Does the model account for diesel price volatility?

Sensitivity analysis: at $3.00/gal diesel, VS02 PRO 5-year savings vs APU baseline = $1.28M (still strong). At $4.50/gal, savings = $1.95M. Break-even point where APU is preferred: diesel below $1.95/gal — last seen in 2002 and considered impossible scenario through 2030.

How does the analysis change for European €1.85/L diesel vs US $3.85/gal?

EU diesel at €1.85/L equates to ~$7.85/gal — making the case for VS02 PRO even more decisive. EU fleet 5-year savings vs APU baseline: €1.95M-€2.40M per 100-truck fleet. EU also has stronger regulatory tailwinds (idling fines, zero-emission zones, ETS2 carbon pricing from 2027).