Sungrow SG100CX 100kW On-Grid Inverter — China → Papua New Guinea · Factory Rooftop TCO
Verdict (inverter-line only). Under the scenario on this page, the Sungrow SG100CX 100kW three-phase on-grid inverter, exported from China and landed at a Papua New Guinea factory rooftop, returns NPV = USD 181,170.86, simple payback 0.1883 yr (~2.3 months), discounted payback 0.2033 yr, IRR 5.32 (annualised internal rate of return over the 10-year horizon), and LCOE USD 0.0072/kWh over a 10-year horizon at 8.00% discount. Equipment: Sungrow SG100CX. Location: PNG (POM or LAE). Horizon: 10 yr. Evidence date: 2026-09-21. Limitation: this is the inverter-line-only payback; full-system payback (modules + racking + BoS + duty/VAT) is materially longer.
Decision table — Sungrow SG100CX, CN→PNG factory rooftop (inverter line only)
| Metric | Value | Scope / note |
|---|
| Equipment | Sungrow SG100CX, 3-phase 100kW on-grid | Single OEM model |
| Location | PNG factory rooftop (POM or LAE) | Tropical lowland |
| Horizon | 10 yr | Discount rate 8.00% |
| NPV (USD) | 181,170.86 | Discounted, USD |
| IRR | 5.32 | Annualised, from §4.2 TCO summary |
| Simple payback (yr) | 0.1882859281437126 | Inverter line only |
| Discounted payback (yr) | 0.2033488023952096 | Inverter line only |
| LCOE (USD/kWh) | 0.0072 | Inverter-attributed |
| CapEx Yr 0 (USD) | 5,031.00 | FOB + freight + install |
| Yr-1 benefit (USD) | 27,000.00 | 150,000 kWh × USD 0.18/kWh |
Disclaimer. All headline figures are from the scenario model on this page (see §4.2 / §4.3). Figures accessed 2026-09-21. PNG import duty and VAT are PENDING — lookup on the PNG Customs portal and excluded from the CapEx Yr 0 figure above. Tradvolt does not invoice on the figures shown.
1 · Use-Case Definition
| Item | Value | Source |
|---|
| Application | Factory rooftop PV, 100 kWp DC | Use-case defined by buyer |
| Inverter model | Sungrow SG100CX (3-phase 100kW on-grid) | [Claim | Src: Sungrow SG100CX product page | URL: https://en.sungrowpower.com/Commercial-PV-Inverter/SG100CX | accessed 2026-09-21] |
| Inverter topology | Transformerless 3-phase string inverter | [Claim | Src: Sungrow SG100CX datasheet | URL: https://en.sungrowpower.com/uploads/SG100CX-Datasheet.pdf | accessed 2026-09-21] |
| DC / AC ratio | ~1.0–1.2 (100 kWp modules into 100 kW AC) | Sizing convention |
| MPPT inputs | 9 MPPTs (per SG100CX datasheet) | [Claim | Src: Sungrow SG100CX datasheet | URL: https://en.sungrowpower.com/uploads/SG100CX-Datasheet.pdf | accessed 2026-09-21] |
| Max. efficiency / EU efficiency | 98.7% / 98.5% | [Claim | Src: Sungrow SG100CX datasheet | URL: https://en.sungrowpower.com/uploads/SG100CX-Datasheet.pdf | accessed 2026-09-21] |
| Grid interface | 400 V AC 3-phase, 50 Hz | [Claim | Src: Sungrow SG100CX datasheet | URL: https://en.sungrowpower.com/uploads/SG100CX-Datasheet.pdf | accessed 2026-09-21] |
| Operating temp. | −25 °C to +60 °C (derating above 45 °C) | [Claim | Src: Sungrow SG100CX datasheet | URL: https://en.sungrowpower.com/uploads/SG100CX-Datasheet.pdf | accessed 2026-09-21] |
| PPL acceptance | PNG Power Ltd grid-code acceptance — case-by-case | [Claim | Src: PPL Grid Code | URL: https://www.pngpower.com.pg/grid-code | accessed 2026-09-21] |
2 · CapEx — China → PNG (SG100CX line item + freight; duty/VAT PENDING)
Figures in USD. CapEx is the inverter line-item landed cost only; PV modules, racking, DC/AC cabling and BoS balance-of-system are out of scope of this page.
| Line item | Unit | Qty | Low (USD) | High (USD) | Source |
|---|
| SG100CX 100kW on-grid, FOB China | unit | 1 | 1,800 | 3,500 | [Claim | Src: Indicative FOB band for SG100CX-class CN exports | URL: https://en.sungrowpower.com/uploads/SG100CX-Datasheet.pdf | accessed 2026-09-21] |
| Export packing (ISPM 15 wooden crate) | lot | 1 | 60 | 120 | [Claim | Src: IPPC ISPM 15 — wood packaging standard | URL: https://www.ippc.int/en/core-activities/standards-setting/ispms/ | accessed 2026-09-21] |
| Ocean freight FOB → POM or LAE | 20-ft / 40-ft | 1 | 450 | 1,400 | [Claim | Src: Indicative CN→POM/LAE LCL/FCL band | URL: PENDING — RFQ confirmation | accessed 2026-09-21] |
| Marine insurance (0.3% of CIF) | % of CIF | — | 0.30% | 0.30% | [Claim | Src: Institute Cargo Clauses (A), Lloyd's Market Association | URL: https://www.lmalloyds.com/cargo-clauses | accessed 2026-09-21] |
| PNG import duty (ad valorem, HS 8504.40) | line | — | PENDING — lookup | PENDING — lookup | [Claim | Src: PNG Customs — national tariff schedule | URL: https://www.customs.gov.pg/Tariff-Schedule | accessed 2026-09-21] |
| PNG VAT / GST on imported goods | line | — | PENDING — lookup | PENDING — lookup | [Claim | Src: IRC PNG — GST schedule | URL: https://www.irc.gov.pg/goods-and-services-tax | accessed 2026-09-21] |
| Customs broker + THC + DO fees | lot | 1 | 150 | 350 | [Claim | Src: Indicative POM/LAE THC + broker band | URL: PENDING — RFQ confirmation | accessed 2026-09-21] |
| Inland transport POM/LAE → site | lot | 1 | 200 | 700 | [Claim | Src: Indicative PNG domestic trucking band | URL: PENDING — RFQ confirmation | accessed 2026-09-21] |
| Install, AC/DC cabling, commissioning (inverter share) | lot | 1 | 400 | 900 | [Claim | Src: Indicative C&I rooftop install rate, PNG labour band | URL: PENDING — RFQ confirmation | accessed 2026-09-21] |
| CapEx band (excluding PENDING duty/VAT) | ≈ 3,060 | ≈ 6,970 | USD per SG100CX, landed & commissioned |
|---|
3 · OpEx — Annual (SG100CX share, 10-year horizon)
| Item | Assumption | Annual (USD) | Source |
|---|
| Routine O&M (inverter share of C&I service contract) | ~0.5% of inverter CapEx / yr | 15 – 35 | [Claim | Src: Industry convention, C&I PV service-contract band | URL: PENDING — RFQ confirmation | accessed 2026-09-21] |
| Spare parts reserve (fans, SPD, DC fuses) | ~0.3% / yr | 10 – 20 | [Claim | Src: Industry convention | URL: PENDING — RFQ confirmation | accessed 2026-09-21] |
| Insurance (PV asset, inverter share) | ~0.2% of asset / yr | 6 – 14 | [Claim | Src: Industry convention | URL: PENDING — RFQ confirmation | accessed 2026-09-21] |
| Monitoring / SCADA comms (cellular/Eth) | Data SIM + cloud | 60 – 120 | [Claim | Src: Sungrow iSolarCloud service | URL: https://en.sungrowpower.com/Service/iSolarCloud | accessed 2026-09-21] |
| Downtime / production loss reserve | 1–2% energy at risk | 40 – 90 | [Claim | Src: Industry convention | URL: PENDING — RFQ confirmation | accessed 2026-09-21] |
| Extended warranty (years 6–10) | Amortised | 40 – 120 | [Claim | Src: Sungrow SG100CX warranty terms | URL: https://en.sungrowpower.com/Service/Warranty | accessed 2026-09-21] |
| OpEx band (annual, inverter share) | ≈ 171 – 399 | USD/yr · ILLUSTRATIVE — NOT A QUOTE |
|---|
4 · Payback & Sensitivity (scenario model — INVERTER LINE ONLY)
Arithmetic is computed (see §4.2 / §4.3). Replace inputs via RFQ for a system-level TCO. Scope: the SG100CX inverter line + freight + install; PNG duty/VAT are PENDING — lookup and excluded from Yr 0.
| Input | Value | Unit | Source / note |
|---|
| PV system size | 100 | kWp | Use-case |
| Specific yield (PNG tropical lowland) | 1,500 | kWh/kWp/yr | [Claim | Src: PVGIS typical for lowland tropical sites | URL: https://re.jrc.ec.europa.eu/pvg_tools/en/ | accessed 2026-09-21] |
| PV degradation | 0.50 | %/yr | Model assumption — bounded (industry convention 0.3–0.7%/yr) |
| System performance ratio | 0.80 | — | Industry convention |
| Annual generation Yr 1 | 150,000 | kWh/yr | 100 × 1,500 × 1.00 (PR × degradation) |
| Self-consumption share | 100% | — | Factory daytime load; export tariff set to 0 in scenario (ZERO-AS-MISSING default) |
| Grid tariff (blended, factory) | 0.18 | USD/kWh | [Claim | Src: PPL C&I tariff band — confirm at order | URL: https://www.pngpower.com.pg/tariffs | accessed 2026-09-21] |
| Tariff escalation | 1.00 | %/yr | Model assumption — bounded (industry convention 1–3%/yr) |
| Export tariff | 0.00 | USD/kWh | Model assumption — ZERO-AS-MISSING default (no meaningful FiT in PNG) |
| CapEx Yr 0 (USD) | 5,031.00 | USD | Scenario model output |
| Annual OpEx Yr 1 (USD) | 280.00 | USD/yr | Scenario model output (+2%/yr escalation) |
| Residual value (Yr 10) | 0 | USD | Model assumption — bounded (terminal value set to nil for conservatism) |
4.2 · Computed TCO summary (verbatim from scenario model)
TCO summary
| Metric | Value |
|---|
| Currency | USD |
| Horizon (years) | 10 |
| Discount rate | 8.00 % |
| Total undiscounted cost (USD) | 8,096.92 |
| Total discounted cost / PV of costs (USD) | 7,062.73 |
| Total undiscounted benefit (USD) | 282,256.22 |
| Total discounted benefit (USD) | 188,233.58 |
| NPV (USD) | 181,170.86 |
| IRR | 5.32 |
| Simple payback (year) | 0.1883 |
| Discounted payback (year) | 0.2033 |
| LCOE (USD/kWh) | 0.0072 |
4.3 · Year-by-year cash flow (verbatim from scenario model)
Year-by-year cash flow
| Year | Cost (USD) | Benefit (USD) | Net (USD) | Discount factor | Discounted net (USD) | Energy (kWh) |
|---|
| 0 | 5,031.00 | 0.0000 | -5,031.00 | 1.00 | -5,031.00 | 0.0000 |
| 1 | 280.00 | 27,000.00 | 26,720.00 | 0.9259 | 24,740.74 | 150,000.00 |
| 2 | 285.60 | 27,265.29 | 26,979.69 | 0.8573 | 23,130.73 | 149,250.00 |
| 3 | 291.31 | 27,533.18 | 27,241.87 | 0.7938 | 21,625.48 | 148,503.75 |
| 4 | 297.14 | 27,803.71 | 27,506.57 | 0.7350 | 20,218.15 | 147,761.23 |
| 5 | 303.08 | 28,076.90 | 27,773.82 | 0.6806 | 18,902.39 | 147,022.43 |
| 6 | 309.14 | 28,352.77 | 28,043.62 | 0.6302 | 17,672.24 | 146,287.31 |
| 7 | 315.33 | 28,631.35 | 28,316.02 | 0.5835 | 16,522.13 | 145,555.88 |
| 8 | 321.63 | 28,912.66 | 28,591.03 | 0.5403 | 15,446.84 | 144,828.10 |
| 9 | 328.06 | 29,196.74 | 28,868.68 | 0.5002 | 14,441.53 | 144,103.96 |
| 10 | 334.63 | 29,483.62 | 29,148.99 | 0.4632 | 13,501.62 | 143,383.44 |
4.4 · Sensitivity (simple payback, years — inverter line only)
| Grid tariff ↓ / Specific yield → | 1,200 kWh/kWp | 1,500 kWh/kWp | 1,800 kWh/kWp |
|---|
| USD 0.12 / kWh | 0.49 | 0.39 | 0.33 |
|---|
| USD 0.18 / kWh | 0.33 | 0.26 | 0.22 |
|---|
| USD 0.25 / kWh | 0.24 | 0.19 | 0.16 |
|---|
| Years · ILLUSTRATIVE · CapEx USD 4,500, OpEx USD 280/yr, PR 0.80, SC 80% (illustrative, not the scenario) |
|---|
The 4×3 sensitivity grid is an illustrative side-grid. The computed payback is §4.2: simple 0.1883 yr, discounted 0.2033 yr.
5 · Compliance & Certifications
Confirm every line against the Sungrow SG100CX datasheet and against PNG Power Ltd (PPL) interconnection requirements before order.
| Standard / mark | Scope | Issuer / portal | Status |
|---|
| IEC 62109-1:2010 | Safety of power converters for use in PV — Part 1: General requirements (TC 82) | IEC / IECEE | Declared on datasheet [Src: Sungrow SG100CX datasheet | URL: https://en.sungrowpower.com/uploads/SG100CX-Datasheet.pdf | accessed 2026-09-21] · [Standard | URL: https://webstore.iec.ch/en/publication/6470 | accessed 2026-09-21] |
| IEC 62109-2:2011 | Safety of power converters for use in PV — Part 2: Particular requirements for inverters; use jointly with IEC 62109-1 (TC 82) | IEC / IECEE | Declared on datasheet [Src: Sungrow SG100CX datasheet | URL: https://en.sungrowpower.com/uploads/SG100CX-Datasheet.pdf | accessed 2026-09-21] · [Standard | URL: https://webstore.iec.ch/en/publication/6471 | accessed 2026-09-21] |
| IEC 61727 | Utility-interface characteristics of PV inverters | IEC | Declared on datasheet [Src: Sungrow SG100CX datasheet | URL: https://en.sungrowpower.com/uploads/SG100CX-Datasheet.pdf | accessed 2026-09-21] |
| IEC 61683 | Photovoltaic systems — Power conditioners — Procedure for measuring efficiency | IEC | Declared on datasheet [Src: Sungrow SG100CX datasheet | URL: https://en.sungrowpower.com/uploads/SG100CX-Datasheet.pdf | accessed 2026-09-21] |
| IEC 61000-6-2 / -6-4 | EMC immunity / emission (industrial) | IEC | Declared on datasheet [Src: Sungrow SG100CX datasheet | URL: https://en.sungrowpower.com/uploads/SG100CX-Datasheet.pdf | accessed 2026-09-21] |
| CE (LVD 2014/35/EU + EMC 2014/30/EU) | EU market access; commonly carried by CN exporters | European Commission / Notified Body | Declared on datasheet [Src: EUR-Lex Directive 2014/35/EU | URL: https://eur-lex.europa.eu/legal-content/EN/TXT/?uri=CELEX:32014L0035 | accessed 2026-09-21] |
| PPL interconnection acceptance | Grid connection in PNG | PNG Power Ltd (PPL) | PENDING — confirm with PPL [Src: PPL Grid Code | URL: https://www.pngpower.com.pg/grid-code | accessed 2026-09-21] |
6 · Duty / HS Code Block (PNG Customs)
| HS national line | Program | As-of | SoT |
|---|
| 8504.40 (static converters; PV inverters typically classified here) — PENDING — confirm exact national line on PNG Customs | PNG import duty + GST + any IPA / renewable-energy concession | 2026-09-21 | PENDING |
6.1 · Rate rows (every value PENDING — lookup)
No PNG customs rate is hardcoded. All rates must be re-verified on the day of quote issuance.
7 · RFQ — Request Quote (replies in 48h)
- Fill the form below with SKU, qty, incoterm and destination.
- Tradvolt sourcing desk issues a written quotation (FOB / CIF / DDP) within 48 working hours.
- On order confirmation, the sealed SG100CX datasheet and a PNG-customs-friendly commercial invoice are attached to the shipping file.
8 · FAQ
- What is the typical CapEx for a Sungrow SG100CX imported from China to PNG?
- Indicative FOB China unit price for the SG100CX is roughly USD 1,800–3,500; landed + commissioned (excluding PENDING PNG duty/VAT) is USD 3,060–6,970. See §2.
- How many SG100CX units for a 100kW factory rooftop in PNG?
- One SG100CX is the single-unit match. Alternatives: 2× SG50CX or 4× SG25CX in parallel.
- Which compliance marks does the SG100CX carry?
- IEC 62109-1:2010, IEC 62109-2:2011, IEC 61727, IEC 61683, IEC 61000-6-2/-6-4, CE (LVD 2014/35/EU + EMC 2014/30/EU). PPL acceptance is case-by-case.
- What is the payback range for the inverter line?
- Simple payback 0.1883 yr, discounted payback 0.2033 yr — INVERTER LINE ONLY. Full-system payback is materially longer; request via RFQ.
- Which PNG customs HS code applies?
- HS 8504.40 (static converters). Duty and VAT rates are PENDING — re-verify on PNG Customs portal.
- Does Tradvolt provide DDP pricing to POM or LAE?
- Yes. FOB / CIF / DDP builds to POM or LAE on request; replies in 48 hours.