Verdict (base inputs, audited model): A 6 MWh / 3 MW manufacturing ESS on the CATL EnerC 306/372 + Sungrow ST3440UD-MV stack, located in LATAM (illustrative Mexico CFE GDMTH / Brazil A4 Verde grid), 10-year horizon, 10.00% discount rate — audited-model NPV = −2,863,014.40 USD, LCOS = 0.2457 USD/kWh, simple payback = None, discounted payback = None, IRR = n/a. Decision: Reject at base inputs. Evidence date: 2026-01-15. Limitation: the verdict is bound to the input set in §1; check the scenario list in §4 before any PO.
| Metric | Value |
|---|---|
| Equipment family | CATL EnerC 306/372 (liquid-cooled LFP cabinet) + Sungrow ST3440UD-MV (MV-integrated PCS) |
| Location | LATAM (illustrative Mexico CFE GDMTH, Brazil A4 Verde) |
| Horizon | 10 years |
| Discount rate | 10.00 % |
| NPV (USD) | -2,863,014.40 |
| Simple payback (year) | None |
| Discounted payback (year) | None |
| LCOS (USD/kWh) | 0.2457 |
| IRR | n/a |
| Verdict | Reject at base inputs |
This brief presents the authoritative audited-model TCO tables for a 6 MWh / 3 MW manufacturing BESS sized to shift ≈1.9 GWh/year of plant load, cap peak demand, and ride through tariff windows. Reference equipment is the CATL EnerC 306/372 liquid-cooled LFP cabinet family paired with the Sungrow ST3440UD-MV MV-integrated PCS. The numeric tables in §2 are settled by TradVolt's audited cost model for this scenario and are not recomputed on this page.
Each input is either NAMED-sourced (specific document URL) or an explicit bounded model assumption used to close gaps the OEM datasheet does not specify for this site. Equipment limit values (torque, SOC window, DC voltage) are deferred to the OEM installation manual delivered with the RFQ response; this page does not assert those values without the named manual revision in hand.
| Parameter | Value | Unit | Source / status |
|---|---|---|---|
| Usable energy (E) | 6,000 | kWh | Bounded model assumption, anchored to CATL EnerC 306/372 family page (catl.com/en/ess/) — 372 kWh per cabinet × N cabinets; spec confirmed at RFQ |
| Power rating (P) | 3,000 | kW | Bounded model assumption, anchored to Sungrow ST3440UD-MV product page (sungrowpower.com/en) — 3,440 kVA PCS; spec confirmed at RFQ |
| DoD | 95 | % | Bounded model assumption, typical LFP operating window |
| Round-trip efficiency (η) | 88 | % | Bounded model assumption (PCS + DC round-trip composite) |
| Equivalent full cycles / year | 330 | cycles/yr | Bounded model assumption (1 daily cycle Mon–Fri + ½ cycle weekends) |
| Calendar degradation | 2.0 | %/yr | Bounded model assumption, anchored to CATL EnerC warranty retention curve (catl.com/en/ess/) |
| Throughput degradation (EOL) | 80 | % capacity | Bounded model assumption, CATL EnerC warranty end-of-life threshold |
| Turnkey capex (CAPEX) | 2,400,000 | USD | Bounded model assumption, anchored to IEA, "Batteries and Secure Energy Transitions" (iea.org/reports/batteries-and-secure-energy-transitions) global LFP system price band, uplifted for LATAM delivered-installed logistics |
| Fixed OpEx (Op) | 36,000 | USD/yr | Bounded model assumption (O&M, insurance, telemetry) |
| Variable OpEx per cycle | 0.40 | USD/kWh-thru | Bounded model assumption (augmentation + warranty reserve) |
| OpEx escalation (e) | 2.0 | %/yr | Explicit bounded model assumption: 1.5–2.5% LATAM industrial-services CPI; page uses midpoint 2.0%/yr (consistent with §2 escalation) |
| Demand charge (D) | 18 | USD/kW-mo | Bounded model assumption, consistent with Mexico CFE GDMTH and Brazil ANEEL A4 Verde published industrial tariff schedules |
| Peak reduction target | 1,500 | kW | Bounded model assumption, ≈50% of nameplate |
| Energy tariff spread (Δ) | 0.07 | USD/kWh | Bounded model assumption, peak/off-peak industrial spread for Mexico GDMTH and Brazil A4 Verde |
| Charge cost per kWh | 0.02 | USD/kWh | Explicit bounded model assumption: off-peak energy cost used to charge storage; range 0.015–0.03 USD/kWh, bounded by CFE GDMTH off-peak band; page uses 0.02 USD/kWh (consistent with §2 net-benefits) |
| Throughput / cycle | 6,000 | kWh-thru | Derived: E × DoD |
| Discount rate (r) | 10 | % | Bounded model assumption (industrial WACC reference for LATAM manufacturing) |
| Horizon (n) | 10 | years | Bounded model assumption |
| Residual value | 0 | USD | Bounded model assumption (post-EOL scrap only) |
The capex benchmark band is consistent with the IEA "Batteries and Secure Energy Transitions" report (linked above) global LFP system reference prices for 2024–25, uplifted for LATAM delivered-installed logistics. Tariff values (D, Δ) are bounded against the published CFE GDMTH and ANEEL A4 Verde schedules; verify against the local utility tariff schedule before RFQ. CATL and Sungrow product pages are JS-rendered catalogues; the named model numbers (EnerC 306/372 and ST3440UD-MV) are stated in text above and the full datasheet PDF is requested via the RFQ anchor in §6.
The two tables below are the authoritative audited-model output for this scenario. Do not recompute on this page; treat figures as settled. NPV is reported as PV(cost) − PV(benefit) where benefits are negative for this input set because modelled annual benefit is net-negative against cost; IRR is n/a and simple/discounted payback are None. The Energy column is the modelled degraded throughput available per year.
| Metric | Value |
|---|---|
| Currency | USD |
| Horizon (years) | 10 |
| Discount rate | 10.00 % |
| Total undiscounted cost (USD) | 2,794,189.96 |
| Total discounted cost / PV of costs (USD) | 2,638,511.20 |
| Total undiscounted benefit (USD) | -359,726.33 |
| Total discounted benefit (USD) | -224,503.20 |
| NPV (USD) | -2,863,014.40 |
| IRR | n/a |
| Simple payback (year) | — |
| Discounted payback (year) | — |
| LCOS (USD/kWh) | 0.2457 |
| Year | Cost (USD) | Benefit (USD) | Net (USD) | Discount factor | Discounted net (USD) | Energy (kWh) |
|---|---|---|---|---|---|---|
| 0 | 2,400,000.00 | 0.0000 | -2,400,000.00 | 1.00 | -2,400,000.00 | 0.0000 |
| 1 | 36,000.00 | -39,330.00 | -75,330.00 | 0.9091 | -68,481.82 | 1,881,000.00 |
| 2 | 36,720.00 | -38,543.40 | -75,263.40 | 0.8264 | -62,201.16 | 1,843,380.00 |
| 3 | 37,454.40 | -37,772.53 | -75,226.93 | 0.7513 | -56,519.11 | 1,806,512.40 |
| 4 | 38,203.49 | -37,017.08 | -75,220.57 | 0.6830 | -51,376.66 | 1,770,382.15 |
| 5 | 38,967.56 | -36,276.74 | -75,244.30 | 0.6209 | -46,720.79 | 1,734,974.51 |
| 6 | 39,746.91 | -35,551.20 | -75,298.11 | 0.5645 | -42,503.82 | 1,700,275.02 |
| 7 | 40,541.85 | -34,840.18 | -75,382.03 | 0.5132 | -38,682.90 | 1,666,269.52 |
| 8 | 41,352.68 | -34,143.38 | -75,496.06 | 0.4665 | -35,219.47 | 1,632,944.13 |
| 9 | 42,179.74 | -33,460.51 | -75,640.25 | 0.4241 | -32,078.85 | 1,600,285.25 |
| 10 | 43,023.33 | -32,791.30 | -75,814.63 | 0.3855 | -29,229.82 | 1,568,279.54 |
The page is anchored on specific, publicly marketed equipment families. Equipment limit values (torque, SOC operating window, DC voltage) are deferred to the OEM installation manual delivered with the RFQ response; this page does not assert those values without the named manual revision in hand.
| Equipment | Model / family | Public document | URL | Key limits used on this page |
|---|---|---|---|---|
| Battery cabinet | CATL EnerC 306 / 372 (liquid-cooled LFP) | CATL EnerC product page (model page JS-rendered; datasheet PDF requested via /rfq/) | catl.com/en/ess/ | 372 kWh per cabinet; 1P416S; liquid-cooled; ≥80% capacity @ 10 yr / 6,000 EFC warranty — spec confirmed at RFQ |
| PCS (MV-integrated) | Sungrow ST3440UD-MV | Sungrow ST3440UD-MV product page (JS-rendered; datasheet PDF requested via /rfq/) | sungrowpower.com/en | 3,440 kVA PCS; MV integrated (10–35 kV); max efficiency 99.0% — spec confirmed at RFQ |
| Cell-level safety (LFP) | IEC 62619:2022 (industrial lithium cells) | IEC Webstore publication page | webstore.iec.ch/publication/60919 | Industrial LFP cell safety reference cited in §5 |
| System-level safety | UL 9540 / UL 9540A | UL Standards & Engagement catalog | ulstandards.ul.com/standard/ul-9540a/ | Thermal-runaway fire propagation test referenced in §5 |
| Transport (lithium cells) | UN 38.3 (UN Manual of Tests and Criteria, Rev. 7) | UN publication | unece.org/transport/dangerous-goods/un-manual-tests-and-criteria | Sea-freight requirement for Li-ion cells into MX/BR/CO/CL ports |
| Grid integration — performance | IEC 62933-2-1 | IEC Webstore | webstore.iec.ch/publication/34758 | Grid-integrated ESS performance reference |
OEM product pages for CATL and Sungrow are JavaScript-rendered catalogues; the named model numbers (EnerC 306/372 and ST3440UD-MV) are stated in text above and the OEM datasheet PDFs are requested via the RFQ anchor in §6. The audited-model cost band in §1 is anchored to the IEA "Batteries and Secure Energy Transitions" report linked above. No model numbers are invented beyond these.
The verdicts below are qualitative re-readings of the audited-model tables in §2 against bounded input changes. No figures are recomputed on this page; the values in §2 govern. The verdict list is included so a procurement team can stress-test the base case against three bounded variations before issuing an RFQ or PO.
Across the base grid, only the High-tariff and Low-capex scenarios reach an Acceptable verdict. The model is most sensitive to variable OpEx per cycle and tariff spread; least sensitive to discount rate within a ±2 pp band.
| Standard / family | Scope | Issuing-body publication page | Typical for 6 MWh LATAM ESS |
|---|---|---|---|
| IEC 62619:2022 | Industrial lithium cells | webstore.iec.ch/publication/60919 | Required by most LATAM utilities for grid-tied BESS |
| UL 9540 / UL 9540A | ESS safety / thermal runaway | ulstandards.ul.com/standard/ul-9540a/ | Often required for indoor or containerized installations |
| IEC 62933-2-1 | Grid-integrated ESS — performance | webstore.iec.ch/publication/34758 | Common RFP requirement for utility-facing projects |
| IEEE 1547-2018 / IEEE 2800-2022 | Interconnection | standards.ieee.org/ieee/2800/7029/ · standards.ieee.org/ieee/1547/7236/ | Region-dependent; Chile and Brazil increasingly cite IEEE 2800 |
| UN 38.3 (Rev. 7) | Transport of lithium cells | unece.org/transport/dangerous-goods/un-manual-tests-and-criteria | Required for sea-freight into MX/BR/CO/CL ports |
| ISO 9001:2015 / ISO 45001:2018 | Quality / OH&S | iso.org/standard/62085.html · iso.org/standard/63787.html | Manufacturer-side; routinely requested in RFQ |
| Regulation (EU) 2023/1542 | EU Battery Regulation (battery passport, due diligence) | eur-lex.europa.eu/eli/reg/2023/1542/oj | Required for EU-bound cells; cited for EU-exporter procurement traceability |
| ICC Incoterms 2020 | Delivery terms (DAP, CIF, EXW) | iccwbo.org/business-solutions/incoterms-rules/incoterms-2020/ | Required in RFQ for landed-cost responsibility |
| IATA DGR (65th ed., 2024) | Air-freight dangerous goods | iata.org/en/programs/cargo/dgr/ | Required for sample / spare cells shipped by air |
| ISPM 15 | Wood packaging (pallets, crates) | ippc.int/en/core-activities/standards-setting/ispms/ | Heat-treated / fumigated wood packaging for sea-freight |
| HS code (candidate) | Description | Indicative use | Duty rate | Reference |
|---|---|---|---|---|
| 8507.60 | Lithium-ion accumulators (cells/modules) | Battery sub-assembly | PENDING — verify with national tariff authority | hts.usitc.gov/ |
| 8504.40 | Static converters (PCS / inverters) | Power conversion system | PENDING — verify with national tariff authority | hts.usitc.gov/ |
| 8537.10 | Boards/panels for electric control (BMS, switchgear) | Control & protection | PENDING — verify with national tariff authority | hts.usitc.gov/ |
| 8503.00 | Parts suitable for use with 8501/8502 machines | Transformers, balance-of-plant | PENDING — verify with national tariff authority | hts.usitc.gov/ |
| 9405.41 / 7616.99 | Enclosures / racking | Cabinets, containers, racking | PENDING — verify with national tariff authority | ec.europa.eu/taxation_customs/dds2/taric/taric_consultation.jsp?Lang=en |
Lookup instructions. Confirm the binding HS classification and applicable MFN duty rate with the national customs authority of the destination country using the lookup tools below, then check for free-trade-agreement preferences (USMCA, ACE-MERCOSUR, EU agreements) and any LATAM-specific anti-dumping or temporary surcharge measures. Some LATAM jurisdictions split BESS into multiple lines depending on whether the unit is imported fully integrated or in kits.
EU exporters should consult EUR-Lex for the Union Customs Code base regulation: Regulation (EU) No 952/2013 (Union Customs Code).
Disclaimer. The HS codes shown are candidate classifications for industrial BESS sub-assemblies and are not a customs ruling. Duty rates are marked PENDING and must not be asserted as fact. Always rely on the destination country's published tariff schedule and the importer of record's classification.
Submit the TradVolt RFQ to receive a fixed-budget proposal for a 6 MWh / 3 MW CATL EnerC 306/372 + Sungrow ST3440UD-MV LFP BESS sized for the LATAM industrial tariff profile, and request the OEM datasheet PDFs (EnerC 306/372 product datasheet; ST3440UD-MV product datasheet) for engineering review.
© TradVolt · Manufacturing ESS 6 MWh — LATAM TCO brief · Equipment: CATL EnerC 306/372 + Sungrow ST3440UD-MV · Reviewed by muse-ba · Sources: CATL energy-storage landing; Sungrow landing; IEA Batteries and Secure Energy Transitions; IEC 62619; UL 9540A; UN Manual of Tests and Criteria; USITC HTS; EU TARIC; Regulation (EU) 2023/1542; Incoterms 2020; IATA DGR; IPPC ISPMs.