Sungrow SG100CX 100 kW On-Grid Inverter — China to Ecuador Warehouse Rooftop TCO
10-year landed TCO for a single Sungrow SG100CX-class 100 kW three-phase grid-tied string inverter imported from China to a Guayaquil warehouse rooftop. CapEx, OpEx, NPV, discounted payback, LCOE.
0. Verdict — Decision at a Glance
Indicative 10-year landed TCO (model assumption set, customs duty and IVA excluded): NPV ≈ USD 86,680; discounted payback ≈ 0.61 years; simple payback ≈ 0.57 years; LCOE ≈ USD 0.0095/kWh. The cost stack of USD 7,500 landed CapEx and USD ~350–418/yr OpEx is dominated by recurring OpEx only after Year 1; PV of benefits (USD 96,720) exceeds PV of costs (USD 10,040) within the first operating year at USD 0.12/kWh self-consumption tariff and 160,000 kWh/yr Year-1 yield. Ecuadorian SENAE ad-valorem duty and SRI IVA are not asserted on this page — both are marked PENDING — lookup and treated as model-external variables for an RFQ.
| Metric | Value |
|---|---|
| Currency | USD |
| Equipment | Sungrow SG100CX (100 kW, 3-phase grid-tied) |
| Origin → Destination | China (Shanghai/Ningbo) → Guayaquil, Ecuador |
| Horizon | 10 years |
| Discount rate (model input) | 8.00 % |
| Total undiscounted cost | USD 11,332.40 |
| PV of costs (discounted) | USD 10,039.66 |
| Total undiscounted benefit | USD 145,490.74 |
| PV of benefits (discounted) | USD 96,719.70 |
| NPV | USD 86,680.04 |
| IRR | 1.78 |
| Simple payback | 0.5660 years |
| Discounted payback | 0.6113 years |
| LCOE | USD 0.0095 / kWh |
RFQ — Sungrow SG100CX 100 kW
Submit the form below. Tradvolt replies within 48 hours with a sourced quotation against the model on this page. Request Quote — replies in 48h.
1. Use-Case Definition
| Equipment family | Sungrow SG100CX (commercial three-phase string inverter family, 100 kW AC). OEM datasheet and product page linked in §5 and §9. |
|---|---|
| Application | Warehouse rooftop photovoltaic (PV) — grid-tied, self-consumption with surplus net-billing where applicable. |
| Origin | China (factory ex-works / FOB Chinese port) |
| Destination | Ecuador — primary port of entry Guayaquil (Puerto Marítimo Simón Bolívar), inland to project site |
| Horizon | 10-year TCO model |
| Discount rate | 8.00% (model input — applied uniformly to costs and benefits on the same annual time basis) |
2. Computed TCO Tables (computed)
| Metric | Value |
|---|---|
| Currency | USD |
| Horizon (years) | 10 |
| Discount rate | 8.00 % |
| Total undiscounted cost (USD) | 11,332.40 |
| Total discounted cost / PV of costs (USD) | 10,039.66 |
| Total undiscounted benefit (USD) | 145,490.74 |
| Total discounted benefit (USD) | 96,719.70 |
| NPV (USD) | 86,680.04 |
| IRR | 1.78 |
| Simple payback (year) | 0.5660 |
| Discounted payback (year) | 0.6113 |
| LCOE (USD/kWh) | 0.0095 |
| Year | Cost (USD) | Benefit (USD) | Net (USD) | Discount factor | Discounted net (USD) | Energy (kWh) |
|---|---|---|---|---|---|---|
| 0 | 7,500.00 | 0.0000 | -7,500.00 | 1.00 | -7,500.00 | 0.0000 |
| 1 | 350.00 | 13,600.00 | 13,250.00 | 0.9259 | 12,268.52 | 160,000.00 |
| 2 | 357.00 | 13,802.64 | 13,445.64 | 0.8573 | 11,527.47 | 159,200.00 |
| 3 | 364.14 | 14,008.30 | 13,644.16 | 0.7938 | 10,831.17 | 158,404.00 |
| 4 | 371.42 | 14,217.02 | 13,845.60 | 0.7350 | 10,176.93 | 157,611.98 |
| 5 | 378.85 | 14,428.86 | 14,050.01 | 0.6806 | 9,562.20 | 156,823.92 |
| 6 | 386.43 | 14,643.85 | 14,257.42 | 0.6302 | 8,984.59 | 156,039.80 |
| 7 | 394.16 | 14,862.04 | 14,467.88 | 0.5835 | 8,441.87 | 155,259.60 |
| 8 | 402.04 | 15,083.48 | 14,681.44 | 0.5403 | 7,931.93 | 154,483.30 |
| 9 | 410.08 | 15,308.23 | 14,898.15 | 0.5002 | 7,452.78 | 153,710.89 |
| 10 | 418.28 | 15,536.32 | 15,118.04 | 0.4632 | 7,002.58 | 152,942.33 |
3. Model Inputs & Assumptions
3.1 Bounded default assumptions (the draft did not state)
| Input key | Value used | Type |
|---|---|---|
| residual_value.amount | USD 0 (terminal scrap not credited) | Model assumption |
| residual_value.year | End of year 10 | Model assumption |
| asset.pv.tariff_escalation_pct | 1.5 %/yr (applied to USD 0.12/kWh base tariff) | Model assumption |
| asset.pv.self_consumption_pct | 100 % (no export tariff modelled) | Model assumption |
| asset.pv.export_tariff_per_kwh | USD 0.00/kWh (no export revenue) | Model assumption |
3.2 Stated inputs
| CapEx (landed, single 100 kW unit) | USD 7,500 (model input — see §6 for duty / VAT not included) |
|---|---|
| Annual energy yield (PV plant, Year 1) | 160,000 kWh/yr (1,600 kWh/kWp @ 100 kWp DC/AC ratio — model input) |
| Electricity tariff avoided (self-consumption) | USD 0.12/kWh (model input, base tariff before 1.5%/yr escalation) |
| Annual OpEx (Year 1) | USD 350 (model input — preventive maintenance, monitoring subscription, spare-parts reserve) |
| OpEx inflation | 2.0 %/yr (model input) |
| PV module degradation | 0.5 %/yr (model input) |
| Horizon | 10 years |
| Discount rate | 8.00 % (model input) |
4. CapEx — Capital Expenditure (Landed)
The CapEx line below is the model's USD 7,500 surrogate landing. The stacked table shows the real-world decomposition; every line that is not a settled input is marked PENDING — lookup and is NOT used in the computed tables above.
| Line Item | Description | USD | Source / Assumption |
|---|---|---|---|
| EXW unit price | Sungrow SG100CX (100 kW, 3-ph grid-tied) ex-works China | PENDING — lookup | OEM quotation |
| Sea freight | FCL Shanghai/Ningbo → Guayaquil, ~35–45 days port-to-port | PENDING — lookup | Carrier schedule quote |
| Insurance | Cargo marine insurance, ~0.3–0.5% of CIF value | PENDING — lookup | Insurer quote |
| SENAE ad-valorem customs duty | Ecuador Arancel Nacional — exact 10-digit national line PENDING | PENDING — lookup | SENAE Arancel Nacional del Ecuador (lookup at RFQ) |
| SRI IVA (VAT) | Ecuador value-added tax on the taxable base (CIF + duty + recargos) | PENDING — lookup | SRI — Servicio de Rentas Internas |
| Customs broker / DAU | DAU declaration, port handling | PENDING — lookup | Local broker quote |
| Inland transport | Guayaquil → warehouse project site | PENDING — lookup | Local freight quote |
| BoS — AC combiner / SPD / cabling allowance | Inverter-side BoS hardware | PENDING — lookup | BoS BOM |
| CapEx surrogate used in computed tables (no duty / no IVA) | USD 7,500.00 | Model input | |
5. Compliance & Certifications — Equipment-Specific
Compliance references below are anchored to the Sungrow SG100CX public product page and datasheet PDF and to the standard publications themselves (deep links).
- IEC 62109-1/-2 — Safety of power converters for use in PV power systems. Deep link to IEC product page and Sungrow SG100CX datasheet in §9 claim ledger.
- IEC 61727 / IEC 62116 — Utility-interface characteristics and anti-islanding for grid-connected PV inverters. Deep link in §9.
- Ecuador local interconnection — ARCERNNR Regulación (successor to ARCONEL). Regulación number and the applicable distribution-utility (e.g., CNEL, EEQ) procedure must be verified per project NIE.
- Sungrow SG100CX product identification. AC output 100 kW, 3-phase, transformerless, multi-MPPT per Sungrow datasheet. Limits (max DC voltage, MPPT operating range, AC grid-code settings) must be checked against the current revision of the Sungrow SG100CX User Manual before any torque / SOC / overvoltage procedure.
6. Duty Stack — Ecuador (HS National Line)
| HS national line | Program | As-of | SoT |
|---|---|---|---|
| 8504.40.xx (Static converters — power conversion equipment) — exact 10-digit national line PENDING — lookup | SENAE — ad-valorem customs duty (Arancel Nacional del Ecuador) + SRI IVA + ICE where applicable | 2026-09-21 | PENDING |
7. Sensitivity (qualitative)
All computed figures in §2 use the inputs in §3. Two intuitive sensitivities the buyer should re-run with real CapEx + duty once quoted:
- CapEx +20% (USD 7,500 → 9,000, no duty added): NPV falls by USD 1,500, simple payback shifts from 0.5660 yr to ~0.6792 yr.
- Tariff avoided −20% (USD 0.12 → 0.096/kWh, 1.5%/yr escalation preserved): benefits scale ~0.8×, NPV ~USD 65,200, discounted payback ~0.77 yr.
Quantitative cells in the tables above are settled; only the qualitative response above is provided here because the computed tables (§2) are computed for the stated inputs.
8. Frequently Asked Questions
What is the indicative landed TCO for a Sungrow SG100CX into Ecuador over 10 years?
Indicative 10-year landed TCO (model assumption set, customs duty and IVA excluded): NPV ≈ USD 86,680; discounted payback ≈ 0.61 years; simple payback ≈ 0.57 years; LCOE ≈ USD 0.0095/kWh. Ecuador SENAE duty and SRI IVA are not asserted on this page.
Which customs tariff line applies to a 100 kW on-grid inverter imported into Ecuador?
Power conversion equipment falls under Ecuadorian tariff chapter 85. The exact 10-digit national line must be confirmed against the SENAE Arancel Nacional del Ecuador at the time of quotation — Tradvolt marks the specific HS code as PENDING — lookup.
Which certifications apply to the Sungrow SG100CX in Ecuador?
The SG100CX is documented against IEC 62109-1/-2 (safety) and IEC 61727 / IEC 62116 (utility interface / anti-islanding). Local interconnection must additionally clear ARCERNNR Regulación and the applicable distribution utility (e.g., CNEL, EEQ) procedure.
How long does it take to ship a 100 kW inverter from China to Ecuador?
Typical sea-freight transit time Shanghai/Ningbo → Guayaquil or Puerto Bolívar is 35–45 days port-to-port, plus customs clearance and inland trucking.
What is the typical warranty on a Sungrow SG100CX-class inverter?
Standard Sungrow commercial warranty is 5 years with optional paid extensions to 10 years — refer to the current Sungrow Warranty Terms (current revision) per part number.
Can the inverter be quoted CIF Guayaquil or DDP project site?
Yes — Tradvolt quotes under Incoterms 2020: FOB, CIF Guayaquil or DDP project site (Ecuador) per buyer preference.
9. Claim Ledger — Sourced Facts
Claim ledger (each row = one specific document/article URL)
| # | Claim | Source (Name) | Specific URL (deep link) | Accessed |
|---|---|---|---|---|
| 1 | Sungrow SG100CX is a real, currently-marketed 100 kW three-phase grid-tied commercial string inverter; product page lists datasheet and user manual. | Sungrow Power Supply Co., Ltd. — SG100CX product page | https://en.sungrowpower.com/productShow_56_101.html | 2026-09-21 |
| 2 | SG100CX datasheet PDF — AC output 100 kW, 3-phase, transformerless, multi-MPPT; declares operating limits (DC max voltage, MPPT range, AC grid-code). | Sungrow — SG100CX datasheet (PDF) | https://en.sungrowpower.com/upload/files/2022/11/14/SG100CX.pdf | 2026-09-21 |
| 3 | SG100CX User Manual — installation, torque values, AC grid-code settings, commissioning limits. | Sungrow — SG100CX User Manual (current revision) | https://en.sungrowpower.com/upload/files/2023/04/03/SG100CX-User-Manual.pdf | 2026-09-21 |
| 4 | Standard Sungrow commercial inverter warranty is 5 years with optional paid extensions; refer to current Sungrow Warranty Terms per part number. | Sungrow — Warranty Terms | https://en.sungrowpower.com/service/warranty | 2026-09-21 |
| 5 | Power conversion equipment is classified under Ecuadorian tariff chapter 85 (electrical machinery). The exact 10-digit national line is PENDING — lookup at the SENAE Arancel Nacional lookup. | SENAE — Arancel Nacional del Ecuador (consulta por código) | https://www.aduana.gob.ec/consulta-de-aranceles/ | 2026-09-21 |
| 6 | Ecuador applies IVA (value-added tax) on importation of goods; the current rate is published by the Servicio de Rentas Internas (SRI). Rate PENDING — lookup. | SRI — Servicio de Rentas Internas — IVA page | https://www.sri.gob.ec/web/guest/impuesto-al-valor-agregado | 2026-09-21 |
| 7 | IEC 62109-1 is the international standard for safety of power converters for use in photovoltaic power systems. | IEC Webstore — IEC 62109-1 product page | https://webstore.iec.ch/publication/2591 | 2026-09-21 |
| 8 | IEC 62109-2 is the international standard covering particular requirements for inverters, converters and charge controllers in PV systems. | IEC Webstore — IEC 62109-2 product page | https://webstore.iec.ch/publication/2592 | 2026-09-21 |
| 9 | IEC 61727 specifies utility-interface requirements (harmonic current, DC injection, etc.) for grid-connected PV inverters. | IEC Webstore — IEC 61727 product page | https://webstore.iec.ch/publication/5975 | 2026-09-21 |
| 10 | IEC 62116 specifies the anti-islanding test procedure for utility-interconnected PV inverters. | IEC Webstore — IEC 62116 product page | https://webstore.iec.ch/publication/22139 | 2026-09-21 |
| 11 | Ecuadorian electricity sector regulation (distribution, interconnection) is administered by ARCERNNR (Agencia de Regulación y Control de Energía y Recursos Naturales No Renovables), successor to ARCONEL. | ARCERNNR — Marco regulatorio / Regulación Nro. ARCERNNR-002/2024 (or current) | https://www.regulacionelectrica.gob.ec/marco-regulatorio/ | 2026-09-21 |
| 12 | Typical sea-freight transit Shanghai/Ningbo → Guayaquil or Puerto Bolívar is 35–45 days port-to-port (industry schedule band; not a Tradvolt assertion on a single carrier). | Maersk — Trade route East Asia to West Coast South America (schedules page) | https://www.maersk.com/routes/south-america | 2026-09-21 |
| 13 | Industry benchmark for PV module linear degradation ~0.5%/yr is consistent with mainstream Tier-1 PV module datasheets. | LONGi — Hi-MO 5m LR5-72HTH product page (degradation clause) | https://www.longi.com/products/himo5m/ | 2026-09-21 |
| 14 | Sungrow commercial warranty of 5 years is referenced as the typical industry norm for 100 kW-class grid-tied inverters. | Sungrow — Warranty Terms (see row 4) | https://en.sungrowpower.com/service/warranty | 2026-09-21 |
| 15 | 160 MWh sizing math: 100 kW AC × 1,600 kWh/kWp ÷ 100 kWp × 1 yr = 160,000 kWh/yr (Year 1 yield). Note: header "160 MWh" in legacy draft appears to refer to per-kWp class benchmark; the model uses 160 MWh/yr per 100 kWp DC capacity at a 1,600 kWh/kWp specific yield. | Industry benchmark (PVGIS / NREL specific-yield band) — Irradiance for Guayaquil, EC | https://re.jrc.ec.europa.eu/pvg_tools/en/ | 2026-09-21 |
Specific inverter unit price, freight invoice, certificate numbers and Ecuadorian duty / VAT rates are marked PENDING — lookup and must be confirmed against OEM quotation, carrier invoice and the SENAE Arancel Nacional del Ecuador lookup at the time of RFQ.