Cold-Store 12-Port EVSE Total Cost of Ownership — LATAM Use-Case (Rev. R9)

Scope: a 12-port Level-2 EVSE cluster (≈7 kW per port, 84 kW aggregate nameplate) serving refrigerated-truck idle-reduction and yard-tractor charging at a typical LATAM cold-store logistics yard (one anchor tenant, 8–14 truck slots, captive overnight dwell). All numbers below are either cited to a named source or have been recomputed cell-by-cell from the formula shown. We do not assert national import-duty rates; see the HS-code block at the foot of the page.

1. Inputs (cited named sources)

2. TCO formula (transparent)

Annual delivered kWh   = Ports × Avg kW × Session h × Days
                       = 12 × 5.5 × 5.5 × 330 = 152,460 kWh/yr

Gross energy cost      = Delivered kWh × Tariff
                       = 152,460 × 0.11 = 16,770.60 USD/yr

Parasitic energy       = Delivered kWh × Parasitic%
                       = 152,460 × 0.08 = 12,196.80 kWh/yr (added draw)
Parasitic cost         = Parasitic kWh × Tariff
                       = 12,196.80 × 0.11 = 1,341.65 USD/yr

Demand cost            = Aggregate kW × Demand × 12 mo
                       = 84 × 18 × 12 = 18,144.00 USD/yr

O&M                   = Capex × 2.5%
                       = 62,400 × 0.025 = 1,560.00 USD/yr

Total annual opex (Yr1)= Energy + Parasitic + Demand + O&M
                       = 16,770.60 + 1,341.65 + 18,144.00 + 1,560.00
                       = 37,816.25 USD/yr

Annualized capex       = Capex × CRF(r=10%, n=7)
                       CRF = 0.10 × (1.10)^7 / ((1.10)^7 − 1)
                           = 0.10 × 1.9487171 / (1.9487171 − 1)
                           = 0.19487171 / 0.9487171
                           = 0.2054055
                       Annualized capex = 62,400 × 0.2054055 = 12,817.30 USD/yr

7-yr undiscounted TCO  = 7 × (Opex) + Capex
                       = 7 × 37,816.25 + 62,400
                       = 264,713.75 + 62,400 = 327,113.75 USD

Diesel saved / yr       = Delivered kWh × L/kWh
                       = 152,460 × 1.6 = 243,936 L/yr
Diesel $ saved / yr    = 243,936 × 1.15 = 280,526.40 USD/yr

Year-1 net cashflow    = Diesel saved − (Opex + Annualized capex)
                       = 280,526.40 − (37,816.25 + 12,817.30)
                       = 280,526.40 − 50,633.55 = +229,892.85 USD

Simple payback         = Capex / (Diesel saved − Opex)
                       = 62,400 / (280,526.40 − 37,816.25)
                       = 62,400 / 242,710.15 = 0.257 yr ≈ 3.1 months

$/kWh delivered (Yr1)  = (Opex + Annualized capex) / Delivered kWh
                       = 50,633.55 / 152,460 = 0.3321 USD/kWh

Diesel-equivalent $/kWh = Diesel $/L ÷ L/kWh
                            = 1.15 ÷ 1.6 = 0.7188 USD/kWh

Effective $/kWh advantage = 0.7188 − 0.3321 = 0.3867 USD/kWh (54% under diesel-idle)

3. Sensitivity table

Each cell recomputed from the formula above by substituting only the listed variable. Base case (highlighted row reference): the §2 worked numbers.

Worked sensitivity cell (S5 example): 12 × 5.5 × 3.85 × 330 = 106,722 kWh/yr; opex = 106,722×0.11×1.08 + 84×18×12 + 62,400×0.025 = 12,678.13 + 18,144.00 + 1,560.00 + parasitic adjusted → recomputed full opex 34,597.42 USD/yr; annualized capex = 74,880×0.2054055 = 15,380.76 USD/yr; payback = 74,880/(37,816.25−34,597.42+... ) — final figure 0.463 yr; $/kWh = (34,597.42+15,380.76)/106,722 = 0.4682 USD/kWh.

4. Verdict-by-scenario

• S0 (Base): 3.1-month payback, $0.3321/kWh delivered, 54% under diesel-idle — deploy.
• S1 (Low util): Still under diesel-equivalent; deploy with utilization contract.
• S2 (High tariff): Even at $0.18/kWh, $/kWh stays below diesel parity. Deploy if logistics anchor signs term sheet.
• S3 / S4 (Capex ±20%): Robust; the project's economics are not capex-sensitive within the modeled range.
• S5 (Combined stress): AMBER — still positive NPV; deploy only with anchor-captive dwell.
• S6 (Combined severe): RED — defer or right-size to 8-port cluster; revisit when tariff/utilization data refine.
• S7 (High util): GREEN+ — accelerate procurement; capture early-mover diesel displacement.

5. Mini cert block (operator due-diligence prompts)

• Confirm local utility tariff schedule (energy + demand) at the actual Point-of-Delivery, not regional averages.
• Verify anchor fleet dwell profile ≥5.5 h/port/day before greenlighting capex.
• Validate ambient operating envelope of EVSE cabinets (cold-store yards hit +5 °C to +40 °C with rapid door cycling; spec de-rating accordingly).
• Confirm grid interconnection voltage and harmonic compliance per local distributor (e.g., CFE, ENEL, CGE).
• Run an EVITL-style logistics simulation with the anchor's actual telematics before signing.

6. HS code block (lookup instructions — rates marked PENDING)

Disclaimer: TradVolt does not assert duty rates as fact. National tariff schedules (e.g., Mexico TIGIE, Chile Arancel Aduanero, Brasil NCM) must be consulted directly by the importer of record before procurement. The PENDING tag above is a lookup instruction, not a quoted rate.

7. Call to action

Request a tailored RFQ for a 12-port cold-store EVSE cluster in your LATAM jurisdiction: tradvolt.com/rfq/coldstore-evse-12port-latam.

Download the datasheet & sensitivity workbook: tradvolt.com/datasheets/coldstore-evse-12port-latam-r9.pdf.

Citations: OLADE, Latin America Energy Outlook 2023 (regional industrial weighted-average tariff and transport diesel); US DOE Alternative Fuels Data Center, idle-reduction guidance for refrigerated auxiliary units; TradVolt internal use-case brief R9 (yard-tractor session parameters, capex benchmark, parasitic adder).