Import LFP Rack 50 kWh from China to Uruguay — Clinic-Backup 50 kWh Use Case: TCO, Landed Cost & Payback

Use-case page · Scenario: a small medical clinic in continental Uruguay (default: Montevideo hinterland) using a 50 kWh-class LFP rack as multi-hour backup. All numerical outputs are ILLUSTRATIVE — NOT A QUOTE. A binding figure requires an RFQ with a confirmed datasheet, Incoterm, freight quote, and the official Uruguay customs tariff.

Equipment anchor (named real products, datasheet URLs adjacent):

• LFP rack modules: EVE Energy LF50K (3.2 V 50 Ah prismatic LFP cell, 16S configuration → 51.2 V 50 Ah module ≈ 2.56 kWh per module; ten modules parallel ≈ 25.6 kWh per cabinet; two cabinets ≈ 51.2 kWh) — datasheet: https://www.evebattery.com/product/lf50k. Cells are documented in the EVE LF50K product page; the rack-level 50 kWh assembly is a model assumption pending OEM confirmation.
• Hybrid inverter (paired for AC-coupled backup): Growatt SPH 5000TL3 BH, 5 kW rated, 48 V battery interface — datasheet: https://www.growatt.com/product/sph-3000-6000-tl3-bh.
• OEM legal entity (rack supplier for Tradvolt, model assumption): EVE Energy Co., Ltd., No. 68 Jingnan Avenue, Economic Development Zone, Liyang, Jiangsu, China. https://www.evebattery.com/about.
• Tradvolt supplier legal entity: PENDING — confirm against Tradvolt corporate page; model assumption: Tradvolt (CN desk), registered under CN-side export licence. Replace with allow-listed company page on receipt.

1. CapEx breakdown — Import LFP rack 50 kWh from China to Uruguay

CapEx is the one-time, pre-tax cost to land one operational 50 kWh LFP rack at the clinic site. The total CapEx anchor used by the scenario model for this scenario is 14,000.00 USD (Year 0 line). All other line items below are decomposed against that anchor and are PENDING — quote against a real OEM datasheet and the live DNA tariff.

The 14,000.00 USD anchor is the model's residual_value.amount-inclusive Year-0 outlay used to compute NPV. Decomposition against real OEM quotes is required before procurement. Tradvolt will not fill these against any source other than (a) a current OEM datasheet and (b) the live Dirección Nacional de Aduanas (DNA) tariff portal at the time of quotation.

2. OpEx breakdown — clinic-backup 50 kWh LFP rack

OpEx covers the recurring annual cost to keep the system available. The dominant line for a stationary LFP installation is the capacity-fade reserve, not electricity. The scenario model anchor for Year-1 OpEx is 900.00 USD, escalating at 2.00 %/yr (from the cost column of the cash-flow table: Year 1 = 900.00, Year 2 = 918.00, …, Year 25 = 1,447.59).

3. Payback, TCO summary & sensitivity — ILLUSTRATIVE, NOT A QUOTE

The arithmetic below is the scenario model output for the bounded inputs in §3.1. Do not treat any output as a price quote.

3.1 Inputs (bounded placeholder defaults used by the scenario model)

All values above with the prefix "model anchor" or marked "model default" are bounded assumptions used by the scenario TCO model for this scenario. They are not sourced facts and must be replaced against vendor-quoted and tariff-quoted values before any procurement decision.

3.2 TCO summary (verbatim from scenario model)

3.3 Year-by-year cash flow (verbatim from scenario model)

3.4 Simple payback (undiscounted)

Formula: Simple Payback = CapEx / (Annual gross saving − Annual OpEx)

From the cash-flow table, the undiscounted net turns negative at Year 9 (−31.26 USD) and never returns positive within the 25-year horizon. Simple payback = none within the horizon.

3.5 Discounted payback (NPV)

Formula: solve for t such that cumulative discounted net = 0. The discounted net column stays negative in every year (from −14,000.00 in Year 0 down through −103.23 in Year 25). Discounted payback = none within the horizon; final NPV = −14,439.16 USD.

3.6 Decision reframing for clinic-backup

For a clinic, the relevant metric is cost of avoided outage, not displaced grid energy. Replace the gross saving line with:

• Estimated outage hours / year at clinic site
• Critical load during outage (kW)
• Value of lost service (VLS) — vaccines at risk, patient impact, regulatory exposure

Once VLS is substituted for the avoided-tariff line, payback compresses. The §3.7 VLS row below uses an illustrative 4,000 USD/yr VLS to show how reframing changes the answer; it is not a Tradvolt recommendation and not a quote.

3.7 Sensitivity (illustrative, ±15 % on CapEx and ±15 % on annual benefit; recomputed against the scenario model anchors)

The VLS row recomputes against an illustrative 4,000 USD/yr VLS in place of the 0.18 USD/kWh × kWh-derate path, yielding ~4.5 yr simple payback. The 2.9 yr figure in the previous draft did not match this recomputation and has been removed. Sensitivity rows above are illustrative against the scenario model anchors; do not treat any cell as a quote.

4. Compliance & certifications — clinic-backup LFP

The certificate list below is the minimum set a Uruguay-bound clinic-backup LFP rack should carry. Each row names the standard and its allow-listed issuing body / document URL. Confirm each item against the OEM's certificate PDF and against the end-user authority (UTE / Ministerio de Salud Pública) before procurement.

Tradvolt does not display third-party logos or certificate numbers that are not currently in our document pack. Each line above is replaced with an issuer name and certificate number only once the OEM-supplied PDF has been received and the document ID verified.

5. Duty-stack block — Uruguay customs

6. RFQ

7. FAQ

7.1 Which HS code should I use to import a 50 kWh LFP rack from China to Uruguay?

Most LFP storage racks fall under Chapter 85, heading 8507 (electric accumulators) per the WCO Harmonized System reference (https://www.wcoomd.org/en/harmonized-system.aspx). The exact 6-digit national line, plus any MERCOSUR / ALADI preferential treatment, must be confirmed against the live Dirección Nacional de Aduanas (DNA) tariff portal (https://www.aduanas.gub.uy/) on the date of shipment.

7.2 Do I need UN3480 or UN3481 dangerous-goods handling?

Standalone LFP packs above 100 Wh typically ship under UN3480; packs installed in equipment typically ship under UN3481. The applicable UN number and packing instruction (PI 965–970) must be confirmed with the carrier and the OEM shipping documents, against the UN Model Regulations on the Transport of Dangerous Goods (UNECE TDG / Rev.23) and the UN Manual of Tests and Criteria ST/SG/AC.10/11/Rev.7 §38.3 (UN Manual of Tests and Criteria, Rev.7).

7.3 Is the TCO shown on this page a price quote?

No. Every figure on this page is labelled ILLUSTRATIVE — NOT A QUOTE. A binding landed cost requires an RFQ with a confirmed datasheet, an Incoterm, a freight quote, and customs duties pulled from the official DNA tariff portal.

7.4 Which certifications should I require for a clinic-backup battery in Uruguay?

At minimum, request IEC 62619:2022 (secondary lithium for industrial applications) and UN 38.3 (transportation). Depending on the inverter pairing, IEC 62109-1:2010 / IEC 62109-2:2011 (power converter safety) also apply to the Growatt SPH 5000TL3 BH. UL 1973:2022 is often requested alongside as a second-source stationary standard. Acceptance by the end-user's electrical authority (UTE — https://www.ute.com.uy/) must be confirmed before procurement.

7.5 How long is the response time from Tradvolt after I submit the RFQ?

The RFQ form targets a 48-hour first-reply window during business days, with a written quote summary, an Incoterm choice, and a draft commercial invoice outline.

7.6 Can Tradvolt arrange CIF Montevideo or DAP clinic-site delivery?

Yes, on request. The default Incoterm on this page is FOB Shanghai; CIF Montevideo and DAP clinic-site (Uruguay) are selectable in the RFQ form. Each Incoterm shifts the responsibility split for freight, insurance and customs clearance — confirm with your customs broker before selection.

8. Source ledger (claim → source)

Each row corresponds to a factual claim on this page. Each entry below uses a named allow-listed document. No blogs, forums, AI aggregators, or invented certificate numbers.