Verdict (base case): NPV = −175,972 USD over a 12-year horizon at a 12.00% discount rate; simple payback = none within horizon; discounted payback = none within horizon; LCOS = 0.3823 USD/kWh. Equipment class: commercial Li-ion BESS, ~500 kWh usable, LFP chemistry (candidate family: CATL EnerC / BYD Battery-Box Commercial / Sungrow ST255kFlex-class cabinets). Location: LATAM (destination tariff and demand-charge schedules are owner-defined). Horizon: 12 years. Evidence date: 2026-01-15. Limitation: financial figures are computed outputs of the scenario model; all tariff, demand-charge, WACC, efficiency and DoD inputs are illustrative bounded assumptions, not sourced facts, and must be replaced with the buyer's own utility bill, EPC offer and lender term-sheet.
| Metric | Value | Read |
|---|---|---|
| NPV @ 12% over 12 yr | −175,972 USD | Negative — base case does not clear WACC |
| IRR | −5.74% | Below the 12% hurdle — do not proceed on base inputs |
| Simple payback | — | Not reached within 12 years |
| Discounted payback | — | Not reached within 12 years |
| LCOS | 0.3823 USD/kWh | Compare to avoided energy + demand cost |
| Base verdict | Avoid / re-tender | Re-scope CAPEX, add solar PV, or renegotiate tariff |
1. Use case definition
Mid-sized bakery chain operating between 8 and 15 production-retail stores across a LATAM country, plus a central dough-freezing commissary. Each retail site carries a walk-in freezer and a convection-oven block; the commissary adds blast chillers. The proposed scope is one 500 kWh commercial battery energy storage system (BESS) at the commissary, used for (i) daily peak-shaving of the dough-mixer and oven loads, (ii) short-duration backup of freezer circuits during grid events common in the region, and (iii) shifting solar from a planned rooftop PV array to evening bake windows. Equipment family referenced (illustrative, not endorsed): LFP commercial cabinet-class products such as CATL EnerC / BYD Battery-Box Commercial / Sungrow ST255kFlex liquid-cooled cabinets. Limits (torque, SOC window, DC voltage) must be read from the specific OEM manual revision supplied with the chosen SKU before site commissioning.
2. Inputs (bounded assumptions — replace before procurement)
| Input | Base value | Unit | Status |
|---|---|---|---|
| Usable energy | 500 | kWh | Model assumption (use case spec) |
| Round-trip efficiency (DC) | 0.92 | — | Model assumption (typical LFP cabinet round-trip, per CATL EnerC and Sungrow ST255kFlex datasheet families) |
| DoD | 90 | % | Model assumption (typical LFP operating window) |
| Cycles per year | 330 | cycles/yr | Model assumption |
| Project lifetime | 12 | years | Model assumption |
| Tariff (energy) | 0.18 | USD/kWh | Illustrative bounded assumption — confirm against destination regulator tariff schedule (e.g., CRE Mexico Comisión Reguladora de Energía, ANEEL Brazil ANEEL, ENRE Argentina ENRE) |
| Demand charge | 22 | USD/kW-month | Illustrative bounded assumption — confirm against same utility tariff schedule |
| WACC (post-tax) | 12.00 | % | Illustrative bounded assumption — replace with signed lender term-sheet (e.g., IDB Invest IDB Invest, CAF CAF, or local bank) |
| Peak demand reduced | 120 | kW | Model assumption |
| Energy shifted / day | 420 | kWh | Model assumption |
| CAPEX (base) | 280,000 | USD | Model assumption — confirm against EPC offer |
| Fixed OPEX / yr | 6,500 | USD | Model assumption |
| Variable OPEX / kWh throughput | 0.005 | USD/kWh | Model assumption |
| Degradation (capacity fade) | 2.0 | %/yr | Model assumption — bounded default not in draft (recompute throughput by year) |
| Residual value | 0 | USD | Model assumption — bounded default not in draft |
| Residual value at year | 12 | yr | Model assumption — bounded default not in draft (aligned with horizon) |
3. computed results
The following tables are outputs of the scenario model and are computed for this scenario. Inputs and arithmetic are not re-derived here; replace the assumption rows in §2 with buyer-specific values and re-run before any procurement decision.
| Metric | Value |
|---|---|
| Currency | USD |
| Horizon (years) | 12 |
| Discount rate | 12.00 % |
| Total undiscounted cost (USD) | 367,178.58 |
| Total discounted cost / PV of costs (USD) | 323,840.80 |
| Total undiscounted benefit (USD) | 279,038.72 |
| Total discounted benefit (USD) | 147,868.63 |
| NPV (USD) | -175,972.17 |
| IRR | -0.0574 |
| Simple payback (year) | — |
| Discounted payback (year) | — |
| LCOS (USD/kWh) | 0.3823 |
| Year | Cost (USD) | Benefit (USD) | Net (USD) | Discount factor | Discounted net (USD) | Energy (kWh) |
|---|---|---|---|---|---|---|
| 0 | 280,000.00 | 0.0000 | -280,000.00 | 1.00 | -280,000.00 | 0.0000 |
| 1 | 6,500.00 | 25,922.93 | 19,422.93 | 0.8929 | 17,341.91 | 148,500.00 |
| 2 | 6,630.00 | 25,404.48 | 18,774.48 | 0.7972 | 14,966.90 | 145,530.00 |
| 3 | 6,762.60 | 24,896.39 | 18,133.79 | 0.7118 | 12,907.27 | 142,619.40 |
| 4 | 6,897.85 | 24,398.46 | 17,500.61 | 0.6355 | 11,121.95 | 139,767.01 |
| 5 | 7,035.81 | 23,910.49 | 16,874.68 | 0.5674 | 9,575.15 | 136,971.67 |
| 6 | 7,176.53 | 23,432.28 | 16,255.75 | 0.5066 | 8,235.67 | 134,232.24 |
| 7 | 7,320.06 | 22,963.63 | 15,643.58 | 0.4523 | 7,076.36 | 131,547.59 |
| 8 | 7,466.46 | 22,504.36 | 15,037.90 | 0.4039 | 6,073.56 | 128,916.64 |
| 9 | 7,615.79 | 22,054.27 | 14,438.49 | 0.3606 | 5,206.66 | 126,338.31 |
| 10 | 7,768.10 | 21,613.19 | 13,845.09 | 0.3220 | 4,457.75 | 123,811.54 |
| 11 | 7,923.46 | 21,180.93 | 13,257.46 | 0.2875 | 3,811.20 | 121,335.31 |
| 12 | 8,081.93 | 20,757.31 | 12,675.37 | 0.2567 | 3,253.45 | 118,908.61 |
4. Verdict by scenario
- Base CAPEX, base tariff: Avoid. NPV is strongly negative and payback is not reached within the 12-year horizon. Re-tender CAPEX or re-scope before any RFQ is signed.
- High CAPEX (USD 330,000), low tariff (USD 0.14/kWh): Strongly avoid. Wait for hardware price decline or add solar PV to lift throughput value.
- Base CAPEX, high tariff (USD 0.22/kWh): Marginal improvement; recompute with buyer-specific tariff before declaring it greenlit.
- Low CAPEX (USD 240,000), high tariff: Most favorable cell. Proceed only after replacing the tariff with the buyer's actual published schedule.
- Any cell: Replace every assumption row in §2 with the buyer's own utility bill, EPC offer, and lender term-sheet, then re-run. The verdict above is not a recommendation.
5. Mini certification block
| Standard / cert. | Scope | Reference |
|---|---|---|
| IEC 62619 | Secondary Li-ion cells for industrial ESS | IEC Webstore — IEC 62619 |
| IEC 62933-5-2 | ESS safety, grid-integrated | IEC Webstore — IEC 62933-5-2 |
| UL 9540 / 9540A | ESS safety; thermal runaway fire propagation | UL Standards — UL 9540 |
| UN 38.3 | Transport of Li-ion cells | UNECE — Manual of Tests and Criteria, Section 38.3 |
| IEEE 1547 | Interconnection (where applicable) | IEEE Standards — IEEE 1547-2018 |
| Local AHJ permit | Municipal electrical / fire permit | Owner to secure against destination AHJ |
Certifications are reference requirements, not assertions about any specific SKU. The exact compliance status must be read from the chosen OEM's datasheet and test report.
6. HS code reference block
| HS code (2022 rev.) | Description (short) | MFN duty — destination |
|---|---|---|
| 8507.60 | Lithium-ion accumulators (incl. cells and battery packs) | Verify per USITC HTS: 8507.60 HTS search; cross-check with destination customs schedule at moment of entry. |
| 8504.40 | Static converters; power supply units for BESS inverters | Verify per USITC HTS: 8504.40 HTS search. |
| 8537.10 | Boards/panels for electric control, EMS / BMS enclosures | Verify per USITC HTS: 8537.10 HTS search. |
Disclaimer on duties: Duty, VAT and any antidumping / countervailing measures must be confirmed against the destination country's binding tariff schedule at the moment of entry. Tradvolt does not assert any specific MFN rate as fact. For EU entry consult EUR-Lex — TARIC / Combined Nomenclature; for MERCOSUR members consult each country's national tariff (e.g., Argentina NCM, Brazil NCM, Mexico TIGIE) and any Pacific Alliance preference in force.
7. OEM equipment reference (illustrative, not endorsed)
The 500 kWh commercial BESS class maps to several publicly marketed LFP cabinet families. The list is illustrative; the chosen SKU and its OEM manual revision govern all electrical, mechanical and SOC-window limits at the site.
- CATL EnerC commercial cabinet — product page: CATL Energy Storage.
- BYD Battery-Box Commercial — product page: BYD Energy Storage.
- Sungrow ST255kFlex liquid-cooled cabinet — product page: Sungrow ST255kFlex.
- Huawei LUNA2000 commercial series — product page: Huawei Smart LUNA2000.
- EVE Energy LFP cell family (used inside several commercial cabinets) — product page: EVE Energy.
For any chosen SKU, record: OEM manual title, document revision, DC voltage window, SOC operating window, recommended torque values for DC bus and rack bolts, and the stated round-trip efficiency. These limits are SKU-specific and are not modeled generically here.
8. Disclosure
This TCO is an illustrative model prepared by Tradvolt for procurement guidance. It is not a financial quotation and does not constitute investment, tax or legal advice. The financial figures in §3 are computed outputs of the scenario model for the bounded inputs in §2; every other number on this page is either a cited standard / HS reference or an illustrative assumption. Replace every input with values from the buyer's own bill, EPC offer and lender term-sheet before any procurement decision.
9. Next steps
- Request a formal RFQ bundle for a 500 kWh bakery-chain ESS
- Refresh §2 inputs against the buyer's utility tariff page, OEM datasheet PDF and lender term-sheet, then re-run the scenario model.