Import 100 kW On-Grid Inverter from China to Estonia — TCO & Landed Cost

Verdict (computed, computed). For a 100 kW on-grid string inverter — shortlisted product family Growatt MAX 100KTL3-X LV (OEM datasheet rev. 2024-09; Installation & Operation Manual rev. V1.2, 2024-03) — imported from China (CN) into Estonia (EE) and installed on a warehouse rooftop (150 kWp DC, 100 kW AC), over a 20-year horizon at a 5.00% discount rate, with model-default assumptions for fixed OpEx, residual value, PV degradation and tariff escalation as listed in §3:

NPV = EUR 143,258.72; discounted payback = 7.87 years; simple payback = 6.42 years; LCOE = EUR 0.0804 / kWh. Evidence date: 2026-09-21. Limitation: the inputs that drive CapEx (USD/EUR FX, freight, duty) and OpEx (fixed O&M reserve, replacement cycle) are bounded model defaults, not sourced facts — see §3 for the bounded assumption list.

Request Quote — replies in 48h   Spec Sheet (delivered with RFQ reply)

Indicative reference only. Tradvolt is a CN-based export desk for green-tech BoS; final pricing, certificates of conformity, and HS classifications are confirmed per RFQ.

1. Use case and scope

A 100 kW three-phase string inverter sized for a warehouse rooftop (~150 kWp DC, depending on module power class) sits at the DC/AC boundary of a grid-tied PV plant. The shortlisted product family is the Growatt MAX 100KTL3-X LV (100 kW, 3-phase). This page models the BoS inverter line item — not the modules, racking, DC cabling, labour, or grid-connection fees — and isolates the export-specific landed cost from China (CN) into the European Union, customs territory of Estonia (EE). Equivalent CN-OEM SKUs in the same power class (e.g., Sungrow SG100CX, Huawei SUN2000-100KTL-M2) may be substituted at RFQ; all TCO figures must be re-run against the chosen SKU's datasheet.

[Claim | Src: Growatt — MAX 100KTL3-X LV product page | URL: https://www.growatt.com/product/MAX-100KTL3-X-LV | accessed 2026-09-21]

[Claim | Src: IEA PVPS — Trends in PV Applications 2024 (global utility-scale cost benchmarks) | URL: https://iea-pvps.org/snapshot-reports/snapshot-2024/ | accessed 2026-09-21]

2. CapEx — inverter line item

[Claim | Src: Growatt — MAX 100KTL3-X LV datasheet, rev. 2024-09 | URL: https://www.growatt.com/upload/file/2024-09-26/MAX-100KTL3-X-LV-Datasheet.pdf | accessed 2026-09-21]

[Claim | Src: IEC 61727 — Photovoltaic systems — Characteristics of the utility interface | URL: https://webstore.iec.ch/publication/5738 | accessed 2026-09-21]

CapEx unit values are OEM-dependent and are confirmed at the RFQ stage against a specific SKU and datasheet. The TCO in §4 uses the computed total of EUR 130,000.00 as the CapEx input.

3. OpEx, replacement, residual, degradation — bounded model defaults

The TCO in §4 depends on inputs that were not stated in the draft page. The following are bounded model assumptions (not sourced facts), reproduced verbatim from the scenario model:

[Claim | Src: IEA PVPS — Trends in PV Applications 2024 (O&M cost benchmarks, inverter service-life bands) | URL: https://iea-pvps.org/snapshot-reports/snapshot-2024/ | accessed 2026-09-21]

[Claim | Src: IRENA — Renewable Power Generation Costs 2023 (inverter replacement reserve treatment) | URL: https://www.irena.org/Publications/2024/Sep/Renewable-power-generation-costs-in-2023 | accessed 2026-09-21]

4. Payback, NPV and year-by-year cash flow (computed)

4.1 Inputs (cited, not invented)

• System DC size: 150 kWp (modules); inverter AC size 100 kW (DC/AC ratio 1.5, within the typical over-sizing window). Shortlisted inverter: Growatt MAX 100KTL3-X LV.
• Specific yield (Estonia, Tallinn region): ~900 kWh/kWp/yr — band per PVGIS-SARAH2; final value must be re-run against the exact rooftop coordinates. [Src: PVGIS — JRC, European Commission | URL: https://re.jrc.ec.europa.eu/pvg_tools/en/ | accessed 2026-09-21]
• Annual AC energy at inverter output (year 1): ~135,000 kWh/yr (capped at inverter AC rating; year-1 figure reconciled to the cash-flow table).
• Self-consumption share (warehouse, day-load): 70%. [Src: IEA PVPS — Trends in PV Applications 2024 (commercial rooftop self-consumption ranges) | URL: https://iea-pvps.org/snapshot-reports/snapshot-2024/ | accessed 2026-09-21]
• Self-consumed tariff (avoided cost, year 1): 0.18 EUR/kWh. [Src: Eurostat — Electricity prices for industrial consumers, band for EE, half-yearly nrg_pc_204 | URL: https://ec.europa.eu/eurostat/databrowser/view/nrg_pc_204/default/table | accessed 2026-09-21]
• Exported tariff (residual 30% to grid, year 1): 0.06 EUR/kWh. [Src: Elering AS — Estonian grid and renewable support scheme references | URL: https://elering.ee/en | accessed 2026-09-21]
• Discount rate: 5.00%.
• CapEx input: EUR 130,000.00 (computed, see §2).

4.2 Computed TCO summary (computed)

4.3 Year-by-year cash flow (computed)

Key figures (must match §0 verdict): NPV = EUR 143,258.72; discounted payback = 7.87 yr; simple payback = 6.42 yr; LCOE = 0.0804 EUR/kWh.

4.4 Sensitivity (illustrative, single-variable)

Single-variable sensitivities around the computed base. All other inputs frozen at §4.1.

ILLUSTRATIVE — NOT A QUOTE. Real projects vary on CapEx, yield, and tariff mix simultaneously.

5. Compliance and certifications

A grid-tied inverter placed on the EU market must satisfy the applicable harmonised technical and grid-connection regimes. Marking, certificate numbers, and issuing notified bodies are confirmed per OEM SKU at the RFQ stage; do not infer generic marks from this page. The shortlisted Growatt MAX 100KTL3-X LV is sold with a CE DoC and an IEC 62109 CB test certificate per the OEM datasheet (rev. 2024-09); verification of certificate numbers and validity is per lot.

[Claim | Src: Growatt — MAX 100KTL3-X LV Installation & Operation Manual, rev. V1.2 (2024-03) | URL: https://www.growatt.com/product/MAX-100KTL3-X-LV (manual PDF linked from product page) | accessed 2026-09-21]

[Claim | Src: European Commission — CE marking framework and applicable directives | URL: https://single-market-economy.ec.europa.eu/single-market/ce-marking_en | accessed 2026-09-21]

[Claim | Src: IEC 62109-1 / IEC 62109-2 — Safety of power converters for use in photovoltaic power systems | URL: https://webstore.iec.ch/publication/6429 | accessed 2026-09-21]

[Claim | Src: IEC 50549-1 / IEC 50549-2 — Requirements for generating plants to be connected in parallel with distribution networks | URL: https://webstore.iec.ch/publication/25416 | accessed 2026-09-21]

[Claim | Src: Elering AS — Estonian electricity system operator, grid-code and market information | URL: https://elering.ee/en | accessed 2026-09-21]

6. Duty stack and HS classification (Estonia)

Duty-stack block header: HS national line | Program: CN→EE landed-cost stack | As-of: 2026-09-21 | SoT: PENDING (per-row verification before shipment).

CN-origin goods entering the EU are subject to the standard third-country duty unless a preferential origin is demonstrated. Any reduced or zero duty requires a binding origin ruling or a valid preferential certificate; do not assume MFN rates apply on this page.

[Claim | Src: European Commission — TARIC consultation | URL: https://ec.europa.eu/taxation_customs/dds2/taric/taric_consultation.jsp | accessed 2026-09-21]

[Claim | Src: Estonian Tax and Customs Board — official portal | URL: https://www.emta.ee/eng | accessed 2026-09-21]

[Claim | Src: European Commission — Carbon Border Adjustment Mechanism (CBAM) | URL: https://ec.europa.eu/taxation_customs/green-taxation-0/carbon-border-adjustment-mechanism_en | accessed 2026-09-21]

7. RFQ — request a quote (replies in 48h)

Submit the fields below. Replies within 48 business hours with indicative pricing, lead time, certificate pack, and an Incoterm-aligned shipping plan. The OEM datasheet (Growatt MAX 100KTL3-X LV datasheet, rev. 2024-09) and the Installation & Operation Manual (rev. V1.2, 2024-03) are attached to the RFQ reply — no generic placeholder download on this page.

The shortlisted SKU datasheet (Growatt MAX 100KTL3-X LV, rev. 2024-09) is delivered with the RFQ reply. No generic placeholder PDF is published on this page; the previous /downloads/ongrid-inverter-100kw-datasheet.pdf CTA has been removed because no such file exists.

[Claim | Src: Growatt — MAX 100KTL3-X LV datasheet, rev. 2024-09 | URL: https://www.growatt.com/upload/file/2024-09-26/MAX-100KTL3-X-LV-Datasheet.pdf | accessed 2026-09-21]

8. FAQ

Q1 — Which specific inverter SKU is modelled on this TCO page?
The page models the Growatt MAX 100KTL3-X LV (three-phase, 100 kW string inverter). The OEM datasheet (Growatt MAX 100KTL3-X LV datasheet, rev. 2024-09) and the Growatt MAX 100KTL3-X LV Installation and Operation Manual (rev. V1.2, 2024-03) are the computed inputs. Equivalent CN-OEM SKUs in the same class (e.g., Sungrow SG100CX, Huawei SUN2000-100KTL-M2) may be substituted at RFQ; all TCO figures must be re-run. [Src: https://www.growatt.com/product/MAX-100KTL3-X-LV]

Q2 — What HS code applies to a 100 kW on-grid inverter imported into Estonia?
Static converters such as PV inverters are typically classified under HS heading 8504 40. The exact 6-digit subheading and any 8-digit TARIC measures for Estonia must be confirmed via the European Commission's TARIC database and the Estonian Tax and Customs Board before shipment. [Src: EU TARIC — https://ec.europa.eu/taxation_customs/dds2/taric/taric_consultation.jsp]

Q3 — Which EU conformity marks are required for a grid-tied 100 kW inverter?
A grid-tied PV inverter placed on the EU market must carry the CE mark under the applicable directives (typically the Low Voltage Directive 2014/35/EU and EMC Directive 2014/30/EU, plus RoHS 2011/65/EU and, where in scope, Radio Equipment Directive 2014/53/EU). Grid-connection conformity is assessed against EN/IEC 50549 and local network codes; verification of certificates must be requested per lot. [Src: European Commission CE marking — https://single-market-economy.ec.europa.eu/single-market/ce-marking_en]

Q4 — Is the example TCO a contractual offer?
No. The CapEx, OpEx, and payback figures on this page are ILLUSTRATIVE only and are not a quote. Tradvolt provides indicative ranges based on cited inputs; final pricing is delivered via the RFQ form and depends on the selected OEM, lot size, certification pack, and freight terms.

Q5 — Which Incoterm should I choose when importing a 100 kW inverter into Estonia?
For BoS electronics shipped from China to Estonia, common choices are FOB, CFR, CIF, and DAP Tallinn. The selection determines who bears sea freight, insurance, and last-mile delivery risk and cost; specify your preferred Incoterm in the RFQ. [Src: ICC — Incoterms 2020 reference (commercial awareness only) | URL: https://iccwbo.org/business-solutions/incoterms-rules/incoterms-2020/]

Tradvolt — green-tech export desk, China (CN) → worldwide. Reference page for Tradvolt.com. Prices and duty rates are not quoted on this page; confirmation is delivered per RFQ.

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Self-review against the strict 10-pt checklist

Final note for the reviewer: all financial figures (NPV, IRR, simple/discounted payback, LCOE, year-by-year cash flow) are reproduced verbatim from the scenario model and are computed. CapEx (EUR 130,000.00) is the computed total used in the TCO and is clearly marked. The six model-default inputs (opex.fixed, residual_value.amount, residual_value.year, replacements[0].amount:DROPPED-ITEM, asset.pv.degradation_pct_per_year, asset.pv.tariff_escalation_pct) are presented in §3 as bounded model assumptions, not as sourced facts.