Use case · TCO reference

Import 620 W Solar Panels from China to South Africa — Villa Rooftop TCO & Payback

Verdict (illustrative, scenario model): For an 8-module, 4.96 kWp DC villa rooftop using the Longi Hi-MO 7 LR7-72HGD-620M module with a Sungrow SG5K-D string inverter, imported CN→Durban for a Johannesburg homeowner, over a 25-year horizon at an 8.00% discount rate, the scenario TCO model returns NPV = USD 10,509, IRR = 29.43%, simple payback = 3.74 years, discounted payback = 4.56 years, and LCOE = USD 0.0855 / kWh. Customs duty and VAT are excluded from the CapEx above (status: PENDING — SARS lookup required for HS 8541.43). Evidence date: 21 September 2026.

1 · Use case at a glance

[Claim | Src: Longi Green Energy Technology Co., Ltd. — product page for Hi-MO 7 LR7-72HGD-620M | URL: https://www.longi.com/en/products/modules/hi-mo-7/ | accessed 2026-09-21]
[Claim | Src: Sungrow Power Supply Co., Ltd. — product page for SG5K-D | URL: https://en.sungrowpower.com/product-detail/sg5k-d | accessed 2026-09-21]
[Claim | Src: Eskom — Tariff & Customer Notice publications (Eskom Distribution, state power utility, South Africa) | URL: https://www.eskom.co.za/distribution/wp-content/uploads/2024/03/Tariff-booklet-2024.pdf | accessed 2026-09-21]

2 · CapEx (capital cost, landed)

All values are illustrative unit prices in USD; convert at the buyer's booked FX rate. Landed CapEx below covers goods, freight, insurance, customs clearance and installation. Customs duty and VAT are excluded — see §6.

Goods pricing reflects reference FOB China levels for tier-1 spec modules in the 610–630 W class. Final pricing depends on OEM, frame colour, bifacial vs monofacial, glass thickness, and pallet configuration.

3 · OpEx (annual operating cost)

OpEx inflates at +2% / yr in the scenario model. A larger inverter replacement capex in the model defaults is currently set to 0 (inverter replacement cost is treated as a recurring OpEx stream above, not a discrete mid-horizon capex).

4 · scenario TCO summary

5 · Year-by-year cash flow

Benefit stream assumes 100% self-consumption with no export income (bounded assumption). Switching any share of generation to export at a lower ZAR/kWh rate will lengthen payback; see sensitivity in §7.

6 · Bounded model assumptions (explicit)

7 · Sensitivity (illustrative)

The headline numbers assume 1,500 kWh/kWp/yr and 100% self-consumption at the tariff trajectory baked into the scenario model. The table below applies bounded ± shocks to a single variable, holding the rest of the computed inputs constant.

Sensitivity values are approximate; rerun the scenario model for procurement-grade ranges.

8 · Compliance, certifications & BoS

• Module certifications (typical for this class): IEC 61215 (design qualification) and IEC 61730 (safety). The certificate number and validity must be confirmed against the issuing accredited body's public certificate register before procurement. IEC standards are published and sold by IEC Webstore; the standard record pages are linked below.
• Inverter certifications (typical): NRS 097-2-1 (South African grid code) plus IEC 62109-1/-2 (safety). Confirm the certificate number with the issuing body.
• Balance of system: mounting structure should be wind-load rated to SANS 10160 / SANS 10162 for the site; DC cabling to SANS 10142-1.
• Importer of record: the South African buyer is responsible for SARS registration, VAT, and any SABS / NRCS lot verification applicable at the time of import.

[Claim | Src: IEC 61215 — International Electrotechnical Commission (standards body), standard record page | URL: https://webstore.iec.ch/en/publication/29375 | accessed 2026-09-21]
[Claim | Src: IEC 61730 — International Electrotechnical Commission (standards body), standard record page | URL: https://webstore.iec.ch/en/publication/60690 | accessed 2026-09-21]
[Claim | Src: IEC 62109-1 — International Electrotechnical Commission (standards body), standard record page | URL: https://webstore.iec.ch/en/publication/6452 | accessed 2026-09-21]
[Claim | Src: TÜV Rheinland — accredited certification body, certificate register | URL: https://www.tuv.com/world/en/certificates.html | accessed 2026-09-21]
[Claim | Src: TÜV Süd — accredited certification body, certificate register | URL: https://www.tuvsud.com/en/services/certification | accessed 2026-09-21]
[Claim | Src: UL LLC — accredited certification body, product iQ | URL: https://productiq.ulprospector.com/ | accessed 2026-09-21]
[Claim | Src: NRS 097-2-1 — South African grid-interconnection standard, hosted by Eskom Distribution | URL: https://www.eskom.co.za/distribution/wp-content/uploads/2021/06/NRS097-2-1-2017.pdf | accessed 2026-09-21]
[Claim | Src: Sungrow SG5K-D user manual — Sungrow Power Supply Co., Ltd. (inverter manufacturer), product manual revision cited for inverter-side torque, SOC and DC voltage limits | URL: https://en.sungrowpower.com/product-detail/sg5k-d | accessed 2026-09-21]

9 · Duty stack — South Africa (PENDING lookup)

• Customs duty rate: PENDING — lookup on the South African Revenue Service (SARS) Tariff Portal for HS 8541.43.
• VAT rate: PENDING — lookup (current standard VAT on imported goods is published by SARS).
• Possible rebate: PENDING — check whether solar PV components qualify under any active Industrial Tariff Rebate or environmental goods schedule published by SARS / ITAC at the time of import.
• EU reference (for cross-check only, not directly applicable to ZA): EU TARIC measure for HS 8541.43 historically includes a zero-duty treatment for photovoltaic modules — see the EUR-Lex TARIC article for context: Implementing Regulation (EU) 2018/2017, TARIC record (EUR-Lex).
• Official ZA portal: SARS Customs Tariff.

[Claim | Src: South African Revenue Service (SARS) — official customs & tariff portal | URL: https://www.sars.gov.za/customs-and-excise/customs-tariff/ | accessed 2026-09-21]
[Claim | Src: EUR-Lex — EU TARIC / Implementing Regulation (EU) 2018/2017 (reference only, not the ZA tariff line of truth) | URL: https://eur-lex.europa.eu/legal-content/EN/TXT/?uri=CELEX%3A02018R2017-20240101 | accessed 2026-09-21]

10 · Request a quote

Submit the form below; our export team replies within 48 hours with a line-item offer valid for 7 days. Required fields marked with *.

11 · Spec & datasheet

Reference datasheets are hosted by the OEMs:

• Longi Hi-MO 7 LR7-72HGD-620M — product page: https://www.longi.com/en/products/modules/hi-mo-7/
• Sungrow SG5K-D — product page (manual revision cited for inverter-side torque, DC voltage and SOC limits): https://en.sungrowpower.com/product-detail/sg5k-d

Tradvolt republishes OEM datasheets only with written permission. The internal path /datasheets/TV-PV-620W-MONO.pdf from the previous draft is not served on tradvolt.com at the evidence date and is therefore not linked as a download. Use the OEM URLs above for the computed documents.

12 · FAQ

How many 620 W panels are needed for a typical South African villa?

A reference 5 kWp rooftop uses 8 panels × 620 W (4.96 kWp DC). Final sizing depends on usable roof area, tilt, azimuth, shading and the owner's self-consumption profile.

What is the typical payback for a villa rooftop PV system in South Africa?

With the computed inputs (4.96 kWp, 1,500 kWh/kWp/yr, 100% self-consumption, +5%/yr tariff drift, 8% discount rate, 25-year horizon, USD-denominated cash flows), simple payback is 3.74 years and discounted payback is 4.56 years. Real outcomes depend on the SARS-confirmed duty/VAT ruling for HS 8541.43, actual self-consumption share, and Eskom tariff escalation.

Are 620 W modules compliant for South African grid-tie installation?

Grid-tie compliance requires an IEC 61215 and IEC 61730 certified module from an accredited body (e.g., TÜV Rheinland, TÜV Süd, UL LLC). Always verify the certificate number and validity against the issuing body's public register before procurement.

Which HS code applies to solar PV panels imported into South Africa?

South African customs (SARS) uses HS 8541.43 for photovoltaic cells assembled into modules or panels. The exact national tariff line and applicable duty/VAT must be confirmed on the SARS Tariff Portal before each shipment.

Does this page include shipping, customs duty and VAT?

Sea freight (CIF Durban reference) and clearance fees are included as separate CapEx line items in §2. Customs duty and VAT are intentionally marked PENDING — lookup; SARS is the single source of truth, and rates change.

Can Tradvolt ship DDP to a South African address?

Yes, on request, with a nominated clearing agent. DDP pricing requires the SARS-confirmed duty/VAT ruling for HS 8541.43 at the time of quote.

© Tradvolt — CN→world green-tech export. This page is a reference TCO model; numbers shown are illustrative and must be confirmed against an OEM offer and a current SARS duty/VAT ruling before any commercial decision. Evidence date: 21 September 2026.