Import 25kW On-Grid Inverter (Sungrow SG25CX) from China to Myanmar — Factory Rooftop TCO & Landed-Cost Analysis
VERDICT (Sungrow SG25CX, China → Myanmar factory rooftop, 10-year horizon, evidence date 2026-09-21). computed scenario model output for the bounded input set: NPV = USD 20,546.89; discounted payback = 3.01 years; simple payback = 2.59 years; LCOE = USD 0.0450/kWh; IRR = 37.84%. Limitation: results are sensitive to the bounded model assumptions (30 kWp DC, 1,350 kWh/kWp/yr specific yield, 0.80 PR, 90% self-consumption, 0.12 USD/kWh tariff, 0.5%/yr linear module degradation, 8% discount rate, zero fixed opex, zero residual value, single equipment unit CapEx USD 12,000 at Year 0). EXW unit price, freight, and Myanmar duty stack remain PENDING — lookup / RFQ.
| Item | Value | Status |
|---|---|---|
| Equipment / model | Sungrow SG25CX (25 kW, 3-phase, on-grid string inverter) | Named OEM model — public datasheet cited |
| Origin → Destination | China (ex-works) → Myanmar (industrial site, factory rooftop) | Scenario input |
| Horizon | 10 years | Scenario input |
| Discount rate | 8.00 % | Scenario input |
| CapEx (Year 0, undiscounted) | USD 12,000.00 | SCENARIO OUTPUTS (scenario model) |
| NPV | USD 20,546.89 | SCENARIO OUTPUTS (scenario model) |
| IRR | 0.3784 | SCENARIO OUTPUTS (scenario model) |
| Simple payback | 2.59 yr | SCENARIO OUTPUTS (scenario model) |
| Discounted payback | 3.01 yr | SCENARIO OUTPUTS (scenario model) |
| LCOE | USD 0.0450/kWh | SCENARIO OUTPUTS (scenario model) |
| EXW unit price (Sungrow SG25CX) | PENDING — RFQ | Model assumption: bounded default not yet supplied |
| Ocean freight (CN → Myanmar port) | PENDING — lookup | Model assumption: bounded default not yet supplied |
| Myanmar customs duty (HS 8504.40 national line) | PENDING — lookup | Tariff lookup required at shipment date |
| Myanmar Commercial Tax | PENDING — lookup | Tariff lookup required at shipment date |
| Annual fixed OpEx | 0 (bounded default) | Model assumption — explicit |
| Residual value | 0 at Year 10 (bounded default) | Model assumption — explicit |
| Replacements reserve | 0 (bounded default) | Model assumption — explicit |
1. Use-Case Definition
- Application: Factory rooftop, single 25 kW three-phase on-grid (grid-tie) string inverter — Sungrow SG25CX family.
- Origin: China (Sungrow ex-works, Hefei).
- Destination: Myanmar (industrial site, factory rooftop, 400 V AC low-voltage utility connection).
- DC-side assumption: paired with a ~30 kWp PV array (bounded model default).
- Grid interface: 400 V AC three-phase, low-voltage utility connection (PENDING — confirm with local utility, e.g. YESB / MEPE).
- Evidence date: 2026-09-21.
2. Reference Equipment — Sungrow SG25CX
| Field | Value | Source |
|---|---|---|
| Brand / family | Sungrow SG25CX (commercial string inverter, 3-phase) | Sungrow product page |
| Rated AC output | 25 kW | Sungrow SG25CX datasheet (PDF) |
| Topology | Transformerless, multi-MPPT | Sungrow SG25CX datasheet |
| Max DC input voltage (per MPPT limits) | Per OEM manual — confirm exact MPPT Voc limits at RFQ | Sungrow SG25CX user manual |
| Safety certification | IEC 62109-1 / IEC 62109-2 (TÜV Rheinland / TÜV SÜD, IECEE CB Scheme) | Sungrow product page & IECEE CB database |
| Grid-interface compliance | IEC 61727; IEEE 1547 (where project requires) | Sungrow product page |
| Protection class | IP66 (per SG25CX datasheet) | Sungrow SG25CX datasheet |
| Communication | WiFi / Ethernet / RS485 (WiNet-S dongle family) | Sungrow SG25CX datasheet |
Limitation on inverter limits: any torque, SOC, voltage, MPPT Voc range, max input current per MPPT, and AFCI behaviour must be taken from the Sungrow SG25CX OEM user manual revision supplied with the shipment — Tradvolt does not republish manual values without the manual in hand. Public datasheet URL: https://en.sungrowpower.com/product-detail/sg25cx.
3. computed TCO Output (scenario model)
| Metric | Value |
|---|---|
| Currency | USD |
| Horizon (years) | 10 |
| Discount rate | 8.00 % |
| Total undiscounted cost (USD) | 12,000.00 |
| Total discounted cost / PV of costs (USD) | 12,000.00 |
| Total undiscounted benefit (USD) | 48,958.70 |
| Total discounted benefit (USD) | 32,546.89 |
| NPV (USD) | 20,546.89 |
| IRR | 0.3784 |
| Simple payback (year) | 2.59 |
| Discounted payback (year) | 3.01 |
| LCOE (USD/kWh) | 0.0450 |
3.1 Year-by-year cash flow
| Year | Cost (USD) | Benefit (USD) | Net (USD) | Discount factor | Discounted net (USD) | Energy (kWh) |
|---|---|---|---|---|---|---|
| 0 | 12,000.00 | 0.0000 | -12,000.00 | 1.00 | -12,000.00 | 0.0000 |
| 1 | 0.0000 | 4,576.50 | 4,576.50 | 0.9259 | 4,237.50 | 40,500.00 |
| 2 | 0.0000 | 4,644.69 | 4,644.69 | 0.8573 | 3,982.07 | 40,297.50 |
| 3 | 0.0000 | 4,713.90 | 4,713.90 | 0.7938 | 3,742.04 | 40,096.01 |
| 4 | 0.0000 | 4,784.13 | 4,784.13 | 0.7350 | 3,516.48 | 39,895.53 |
| 5 | 0.0000 | 4,855.42 | 4,855.42 | 0.6806 | 3,304.51 | 39,696.05 |
| 6 | 0.0000 | 4,927.76 | 4,927.76 | 0.6302 | 3,105.33 | 39,497.57 |
| 7 | 0.0000 | 5,001.19 | 5,001.19 | 0.5835 | 2,918.14 | 39,300.09 |
| 8 | 0.0000 | 5,075.70 | 5,075.70 | 0.5403 | 2,742.24 | 39,103.59 |
| 9 | 0.0000 | 5,151.33 | 5,151.33 | 0.5002 | 2,576.95 | 38,908.07 |
| 10 | 0.0000 | 5,228.09 | 5,228.09 | 0.4632 | 2,421.62 | 38,713.53 |
4. CapEx & BoS (Indicative — Not a Quote)
| Line Item | Specification / Notes | Qty | Unit | Unit Cost (USD) | Subtotal (USD) |
|---|---|---|---|---|---|
| 25 kW on-grid inverter — Sungrow SG25CX | 3-phase, transformerless, multi-MPPT, IP66 | 1 | pc | PENDING — RFQ | PENDING — RFQ |
| PV modules (mono PERC/TOPCon) | ~550 Wp (LONGi / Jinko / Trina family — model PENDING at RFQ) | ~55 | pc | PENDING — RFQ | PENDING — RFQ |
| DC combiner / DC disconnect | String combiner with fuses + DC isolator | 1 | set | PENDING — RFQ | PENDING — RFQ |
| AC distribution panel + breaker | 63 A, 3-phase, Type A RCD | 1 | set | PENDING — RFQ | PENDING — RFQ |
| DC cabling (PV1-F) | 4 mm² × ~200 m | 200 | m | PENDING — RFQ | PENDING — RFQ |
| AC cabling | 4C×6 mm² ~30 m | 30 | m | PENDING — RFQ | PENDING — RFQ |
| Mounting structure (rooftop) | Aluminium rail + clamps, ballasted/tilted | 1 | lot | PENDING — RFQ | PENDING — RFQ |
| Earthing / lightning protection | Cu conductor + arrestors | 1 | lot | PENDING — RFQ | PENDING — RFQ |
| Monitoring / datalogger (Sungrow WiNet-S / EyeM4) | WiFi/Ethernet module | 1 | pc | PENDING — RFQ | PENDING — RFQ |
| Equipment Subtotal | PENDING — RFQ | ||||
Model input mapping: the scenario model CapEx line of USD 12,000.00 at Year 0 is the single aggregated inverter+BoS cost the model was run with. The component split above is illustrative for the buyer and is not the basis of the NPV / payback figures shown.
5. International Logistics & Landed-Cost Components (Inverter Only)
| Component | Unit | Rate | Amount (USD) | Source / Note |
|---|---|---|---|---|
| EXW unit price (Sungrow SG25CX, 25 kW) | USD/pc | PENDING — RFQ | PENDING — RFQ | Sungrow ex-works, Hefei, China |
| Export packing & crating | lot | — | PENDING — RFQ | ISPM-15 wood packaging as needed (IPPC ISPM 15) |
| Pre-shipment inspection (PSI) | lot | — | PENDING — RFQ | Third-party PSI, e.g. SGS / Bureau Veritas |
| Origin inland transport (factory → port) | lot | — | PENDING — RFQ | Trucking within China |
| Ocean freight (CN → Myanmar port) | CBM or per shipment | PENDING — lookup | PENDING — lookup | LCL or 20’ FCL, depending on volume |
| Marine insurance | % of CIF | ~0.3–0.5% | PENDING — lookup | ICC (A) terms typical |
| Destination charges (THC, doc fees, handling) | lot | — | PENDING — lookup | Myanmar port authority schedule |
| Customs broker / clearance | lot | — | PENDING — lookup | Licensed Myanmar customs broker |
| CIF Landed Subtotal (Inverter, pre-duty) | PENDING — lookup | |||
6. Duty & Tax Stack — Myanmar Import
| HS national line | Program | As-of: 2026-09-21 | SoT: PENDING |
|---|---|---|---|
| 8504.40 (static converters — verify exact national line) | Myanmar Customs duty + Commercial Tax + other levies | 2026-09-21 | PENDING — lookup |
| Levy | Base | Rate | Amount (USD) |
|---|---|---|---|
| Customs duty | CIF | PENDING — lookup | PENDING — lookup |
| Commercial tax (Myanmar internal) | CIF + duty | PENDING — lookup | PENDING — lookup |
| Other levies (e.g. customs service fee) | — | PENDING — lookup | PENDING — lookup |
| Total Duty & Tax Stack | PENDING — lookup | ||
Source of Truth: Myanmar Customs Department — official tariff / ASYCUDA World public tariff viewer (national line under heading 8504.40, e.g. 8504.40.90 or as published). Tradvolt does not publish hardcoded duty rates; confirm with a licensed Myanmar customs broker or the official tariff publication on the date of shipment. Solar BoS items may classify under different HS lines (cable, mounting structure, monitoring) — each line must be looked up separately.
7. OpEx & Bounded Model Assumptions
| Model input | Value used | Type |
|---|---|---|
| PV array size (DC) | 30 kWp | Bounded model assumption |
| Specific yield | 1,350 kWh/kWp/yr | Bounded model assumption |
| Performance ratio (PR) | 0.80 | Bounded model assumption |
| Self-consumption share | 0.90 | Bounded model assumption |
| Tariff (factories, Myanmar) | 0.12 USD/kWh | Bounded model assumption (replace with factory utility-bill value at RFQ) |
| Tariff escalation | 1.5 %/yr (drives benefit growth shown in cash flow) | Bounded model assumption |
| Export tariff | 0 USD/kWh | Bounded model assumption (no export credit modelled) |
| Annual fixed OpEx | 0 USD/yr | Bounded model assumption — DROPPED-ITEM (no fixed opex) |
| Residual value | 0 USD at Year 10 | Bounded model assumption — DROPPED-ITEM |
| Module degradation | 0.5 %/yr linear, Year 2 onward | Bounded model assumption |
| Discount rate | 8.00 %/yr | Bounded model assumption |
| CapEx line (aggregated inverter + BoS) | USD 12,000.00 at Year 0 | SCENARIO OUTPUTS model input |
| CapEx line 2 (secondary) | none | Bounded model assumption — DROPPED-ITEM |
| Replacements reserve | none | Bounded model assumption — DROPPED-ITEM |
The scenario model outputs above (NPV, IRR, payback, LCOE, year-by-year cash flow) were produced under this explicit bounded input set. Re-running with a different tariff, EXW unit price, freight rate, or Myanmar duty rate will change the headline numbers; in particular the current numbers do not yet include freight, customs duty, or Commercial Tax on the SG25CX.
8. Sensitivity Matrix — Discounted Payback (Years)
| Tariff ↓ \ Specific Yield → | 1,200 kWh/kWp | 1,350 kWh/kWp | 1,500 kWh/kWp |
|---|---|---|---|
| 0.09 USD/kWh | PENDING | PENDING | PENDING |
| 0.12 USD/kWh | PENDING | 3.01 (computed) | PENDING |
| 0.15 USD/kWh | PENDING | PENDING | PENDING |
Sensitivity figures populate once CapEx, freight, and duty lines are confirmed in the RFQ. The matrix structure is fixed; values remain PENDING except the computed base case at 0.12 USD/kWh × 1,350 kWh/kWp.
9. Compliance & Certifications — Sungrow SG25CX
- IEC 62109-1 / IEC 62109-2 (Safety of power converters for use in photovoltaic power systems) — certified via IECEE CB Scheme (TÜV Rheinland / TÜV SÜD); certificate ID PENDING — confirm from OEM datasheet at RFQ.
- IEC 61727 (PV utility-interface characteristics) — declared by Sungrow on SG25CX product page; confirm test record on IECEE database at RFQ.
- IEEE 1547 (where project requires) — PENDING — confirm.
- CE conformity (where same SKU is sold into EU) — PENDING — confirm.
- Myanmar utility pre-approval / grid code — PENDING — confirm with local utility (e.g. YESB, MEPE).
Tradvolt does not claim specific certificate numbers on this page; cert IDs must come from the Sungrow SG25CX datasheet / IECEE CB test certificate for the exact production batch supplied. Logos are not displayed unless sourced from the cert body's official records.
10. FAQ
10.1 What HS code applies to a Sungrow SG25CX 25kW on-grid solar inverter imported into Myanmar?
Power conversion equipment typically falls under HS heading 8504.40 (static converters). Verify the exact national line and applicable rates via the Myanmar Customs tariff portal at the time of shipment. Tradvolt marks all duty/CT rates as PENDING — lookup and never hardcodes a rate.
10.2 Which certifications does the Sungrow SG25CX carry?
The SG25CX family carries IEC 62109-1/-2 safety certification (TÜV Rheinland / TÜV SÜD, IECEE CB Scheme) and complies with IEC 61727 / IEEE 1547 grid-interface characteristics as listed on the Sungrow product page. Final certificate IDs must come from the OEM datasheet / IECEE CB test certificate for the exact unit supplied.
10.3 Is the TCO figure on this page a final quote?
No. The headline NPV (USD 20,546.89), IRR (37.84%), simple payback (2.59 yr), discounted payback (3.01 yr), and LCOE (USD 0.0450/kWh) are SCENARIO OUTPUTS outputs of the scenario TCO model under the bounded input set listed in Section 7 (30 kWp DC, 1,350 kWh/kWp/yr specific yield, 0.80 PR, 90% self-consumption, 0.12 USD/kWh tariff with 1.5%/yr escalation, 0.5%/yr linear module degradation, 8% discount rate, 10-year horizon, zero fixed opex, zero residual value, zero replacements reserve, single CapEx line of USD 12,000 at Year 0). The EXW unit price, freight, and Myanmar duty stack remain PENDING — lookup / RFQ; substituting those will change the figures. Request a formal RFQ from Tradvolt for binding numbers.
10.4 What is the typical response time for a Tradvolt RFQ?
Replies are sent within 48 hours of a complete RFQ submission, per Tradvolt's stated SLA.
10.5 Which documents do I receive with the shipment?
Commercial invoice, packing list, bill of lading, certificate of origin, Sungrow SG25CX datasheet and IECEE CB test certificate, plus Tradvolt TCO summary. PSI reports from SGS or Bureau Veritas are available on request.
10.6 Why are duty rates not published on this page?
Myanmar duty and Commercial Tax rates can change and depend on the exact national HS line, the declared CIF value, and any applicable exemptions or concession orders. Tradvolt always sources duty rates from the official Myanmar Customs portal at the time of shipment and marks every figure as PENDING — lookup until then.
11. RFQ & Next Step
Tradvolt SLA: written reply within 48 hours of a complete RFQ submission.
12. Claim & Source Audit
| Claim | Src: NAME | URL | Accessed |
|---|---|---|---|
| Sungrow SG25CX is a real, currently marketed 25 kW three-phase on-grid string inverter with the listed topology, protection class, and safety certifications. | Sungrow Power Supply Co., Ltd. — SG25CX product page & datasheet | https://en.sungrowpower.com/product-detail/sg25cx | 2026-09-21 |
| Sungrow SG25CX carries IEC 62109-1 / IEC 62109-2 safety certification under the IECEE CB Scheme (TÜV Rheinland / TÜV SÜD). | IECEE CB Scheme — CB Test Certificate listing for Sungrow SG25CX | https://www.iecee.org/cbscheme/ | 2026-09-21 |
| IEC 62109-1 / IEC 62109-2 are the harmonised safety standards for PV power converters. | IEC Webstore — IEC 62109-1 and IEC 62109-2 publication records | https://webstore.iec.ch/publication/6397 (IEC 62109-1) and https://webstore.iec.ch/publication/6398 (IEC 62109-2) | 2026-09-21 |
| IEC 61727 covers PV utility-interface characteristics. | IEC Webstore — IEC 61727 publication record | https://webstore.iec.ch/publication/6015 | 2026-09-21 |
| 25 kW on-grid inverters are power converters typically classified under HS heading 8504.40 (static converters). | WCO Harmonized System 2022 edition — Section XVI, Chapter 85, heading 85.04 | https://www.wcoomd.org/en/topics/nomenclature/instrument-and-tools/hs-nomenclature-2022-edition.aspx | 2026-09-21 |
| Myanmar Customs tariff is the computed source for the national HS line under 8504.40 and the applicable duty / Commercial Tax rate at shipment date. | Myanmar Customs Department — official portal / ASYCUDA World tariff viewer | https://www.customs.gov.mm/ | 2026-09-21 |
| ISPM-15 (IPPC) governs wood packaging used in international shipments. | IPPC — ISPM 15 standard page | https://www.ippc.int/en/core-activities/standards-setting/ispms/ | 2026-09-21 |
| ICC (A) marine cargo clauses are standard marine insurance terms used in CIF shipments. | Lloyd's Market Association — LMA/JCC standard wording references | https://www.lmalloyds.com/ | 2026-09-21 |
| CE marking framework (EU conformity assessment), relevant only if same SKU is shipped into the EU. | European Commission — Single Market and Standards, CE marking page | https://single-market-economy.ec.europa.eu/single-market/ce-marking_en | 2026-09-21 |
| UN Manual of Tests and Criteria governs lithium-battery transport classification (referenced for any BESS shipped alongside the inverter). | United Nations — Recommendations on the Transport of Dangerous Goods, Manual of Tests and Criteria | https://unece.org/transport/dangerous-goods/un-manual-tests-and-criteria | 2026-09-21 |
All headline financial figures on this page (NPV USD 20,546.89; IRR 37.84%; simple payback 2.59 yr; discounted payback 3.01 yr; LCOE USD 0.0450/kWh; year-by-year cash flow) are SCENARIO OUTPUTS outputs of the computed Tradvolt TCO model under the bounded inputs in Section 7. All other numbers (EXW price, freight, Myanmar duty stack, Commercial Tax, fixed OpEx, residual value, replacements, second CapEx line) are PENDING — lookup / RFQ and will be confirmed against OEM datasheets and the Myanmar Customs tariff at the RFQ stage.