Verdict (Steps 1–10): This SOP passes the CN→SN export batch when the fall-of-potential earth-electrode resistance Ra is ≤ 10 Ω (target ≤ 5 Ω) and every measured bonding path — array frame, module frame, inverter PE, EVSE cabinet PE, dispenser head and cable screen — reads ≤ 0.1 Ω against the equipment listed below. Equipment: LONGi Hi-MO 6 LR5-72HTH-580M PV array, Sungrow SG125HX 3-phase string inverter, Star Charge DC 120 kW vertical EVSE cabinet (Type-2 outlet, Mode 4). Location / horizon: workshop pre-shipment, export corridor CN → Port Autonome de Dakar, single-day procedure (6 h 30 min on-site, 1 day handover). Evidence date: 2026-09-21. Limitation: tariff duty/VAT/excise rates for HS 8541.43 / 8504.40 / 8537.10 / 8536.90 are pending broker confirmation; electrical limits stated here are from the OEM manuals cited in Annex A.
| Item | Decision / value | Source class |
|---|---|---|
| Earth-electrode resistance Ra | ≤ 10 Ω — pass; ≤ 5 Ω — target for Senegal site | IEC 60364-5-54 |
| Frame / module bonding (LONGi Hi-MO 6) | ≤ 0.1 Ω, 100 % of frames | IEC 62548 + LONGi manual |
| Inverter PE (Sungrow SG125HX) | ≤ 0.1 Ω, 100 % of terminations | IEC 62548 + Sungrow UM |
| EVSE PE (Star Charge DC 120 kW) | ≤ 0.1 Ω, 100 % of terminations | IEC 61851-1 + Star Charge ISM |
| Cable screen bonding | Bonded at one end only — AQL 2.5, Level II | ISO 2859-1 |
| Duty / VAT / excise (HS 8541.43, 8504.40, 8537.10, 8536.90) | Pending broker lookup against Senegal & China live tariffs | Model assumption |
This SOP defines the step sequence, the acceptance limits, the test equipment and the record set used when an array-to-EVSE protective-earth continuity is proved on a Star Charge DC 120 kW vertical EVSE cabinet (≥ 60 kW DC) fed by a Sungrow SG125HX inverter and a LONGi Hi-MO 6 LR5-72HTH-580M PV array, before it leaves the workshop and enters the CN→SN logistics flow.
LR5-72HTH-580M (580 W mono-crystalline, half-cut, 1500 V DC max system voltage). Reference: LONGi Hi-MO 6 product page https://www.longi.com/en/products/modules/hi-mo-6/ and datasheet PDF Hi-MO_6_LR5-72HTH-580M_DS_EN_2408.pdf. Installation manual: LONGi Installation Manual LR5-72HTH Rev. 04, frame-earthing lug torque 2.5 N·m.| Reference | Title / scope |
|---|---|
| IEC 62548 | Photovoltaic (PV) arrays — Design requirements |
| IEC 60364-5-54 | Low-voltage electrical installations — Earthing arrangements and protective conductors |
| IEC 61851-1 | EV conductive charging system — General requirements |
| UL 467 | Grounding and Bonding Equipment (where UL is contractually required) |
| ISO 2859-1 | Sampling procedures for inspection by attributes — AQL reference for record acceptance |
| Step # | Action | Owner | Input doc | Output doc | Done-when |
|---|---|---|---|---|---|
| 1 | Confirm PPE class 2+, apply lock-out tag-out at Sungrow SG125HX DC isolator, AC breaker and inverter switch per UM-SG125HX Rev. 1.6 shutdown sequence | Lead Site Engineer | Project Permit-to-Work | Signed LOTO register entry | All three isolators locked; tags photographed |
| 2 | Open the BoM, single-line diagram and installer commissioning checklist; cross-check against the Star Charge DC 120 kW cabinet nameplate | Commissioning Engineer | BoM / SLD / Installer Commissioning Checklist | Filled Section-A of TV-F-GC-01 | Each line item matched to a physical asset |
| 3 | Visual inspection of LONGi Hi-MO 6 (LR5-72HTH-580M) modules, earthing lugs, bonding jumpers and DC cabling (damage, loose terminations, corrosion) | Commissioning Engineer | Visual Inspection Sheet TV-F-GC-02 | Completed Section-A & photos ≥ 12 | No open defects OR defect list raised |
| 4 | Set up the 4-wire tester (Megger DET2/2 or Chauvin Arnoux CA6460); verify the source loop against the manufacturer calibration card dated within the last 12 months | QC Technician | Tester Calibration Card | Loop-verify entry on TV-F-GC-01 | Loop reading within ± 2 % of card value |
| 5 | Measure earth-electrode resistance using the fall-of-potential method (62 % rule), driving auxiliary stakes ≥ 30 m apart | QC Technician | Site layout plan | Reading Ra, Ω, on TV-F-GC-01 §B | Ra ≤ 10 Ω (target ≤ 5 Ω for Senegal site) |
| 6 | Continuity of main bonding and LONGi Hi-MO 6 frame bonding — clamp on main earthing bar, probe each frame; lug torque verified at 2.5 N·m per LONGi Installation Manual LR5-72HTH Rev. 04 | QC Technician | Module layout plan | Row-by-row Ω table on TV-F-GC-01 §C | Each reading ≤ 0.1 Ω per IEC 62548 |
| 7 | Continuity from PV string PE to Sungrow SG125HX PE terminal (PE busbar torque 6 N·m per UM-SG125HX Rev. 1.6) and to the Star Charge DC 120 kW PE bar | Commissioning Engineer | Inverter terminal diagram | Ω readings on TV-F-GC-01 §D | Each reading ≤ 0.1 Ω; no open continuity |
| 8 | Star Charge DC 120 kW PE verification — enclosure, dispenser head (PE stud torque 8 N·m per ISM-DC120kW Rev. 2.1), cable screen | Commissioning Engineer | EVSE wiring diagram | Ω readings on TV-F-GC-01 §E | Continuity ≤ 0.1 Ω; screen bonded at one end only |
| 9 | Records, photographs and pass/fail tagging — apply green "PE OK" or red "RETEST" label | QC Technician | Photo log TV-F-GC-03 | Completed TV-F-GC-01 with photos attached | Form signed by Lead Engineer and QC Technician |
| 10 | Re-energise Sungrow SG125HX, confirm AC grid connection and DC bus (if a Sungrow SBR battery bank is fitted, hold SOC 30–50 % per SBR User Manual Rev. 3.2 during energise), attach Star Charge DC 120 kW EVSE and hand the folder to the CN→SN logistics cell | Lead Site Engineer | Logistics Gate Pass (template) | Signed Handover Note TV-F-GC-04 | EVSE first-power-on logged; folder filed |
Step count: 10. Estimated effort at site (Step 1 → Step 10): 6 h 30 min.
| Measurement | Limit | Method | Sample (ISO 2859-1) |
|---|---|---|---|
| Earth-electrode resistance Ra | ≤ 10 Ω (target ≤ 5 Ω) | Fall-of-potential, 62 % rule | 100 % of electrodes |
| LONGi Hi-MO 6 frame / module bonding | ≤ 0.1 Ω | 4-wire continuity (Megger DET2/2 or CA6460) | 100 % of frames |
| Sungrow SG125HX PE & Star Charge DC 120 kW PE | ≤ 0.1 Ω | 4-wire continuity | 100 % of terminations |
| Cable screen bonding | Bonded one end only | Visual + continuity | AQL 2.5, General Inspection Level II |
| Phase | Activity | Dependency | Slot |
|---|---|---|---|
| D-3 | Calibration of 4-wire tester confirmed | Calibration card valid | Pre-test (indicative 0.5 day) |
| D-1 | LOTO kit and PPE delivered to site | Permit-to-Work issued | Pre-test (indicative 0.5 day) |
| D-Day | Steps 1–10 executed | All pre-test slots closed | On-site 6 h 30 min |
| D-Day + 1 | Folder handed to CN→SN logistics cell | TV-F-GC-04 signed | Indicative 0.5 day |
| Slot | Description | Status |
|---|---|---|
| S-1 | Site-engineer day rate, CN origin | indicative |
| S-2 | QC technician day rate, CN origin | indicative |
| S-3 | Tester re-calibration, if expired | indicative |
| S-4 | Spare lugs, crimps, labels | indicative |
| S-5 | Re-test allowance if a fail is raised | UNCERTAIN — depends on defect |
HS classification — equipment covered by this SOP
8541.43 (photovoltaic cells assembled into modules or panels). Source: GACC tariff search, heading 8541 https://english.customs.gov.cn/service-list/online-search/tariff-search?hsCode=854143.8504.40 (static converters). Source: GACC tariff search, heading 8504 https://english.customs.gov.cn/service-list/online-search/tariff-search?hsCode=850440.8537.10 (boards, panels, consoles for electric control, ≤ 1 000 V). Source: GACC tariff search, heading 8537 https://english.customs.gov.cn/service-list/online-search/tariff-search?hsCode=853710.8536.90 (apparatus for switching/protecting/connecting of electrical circuits, other). Source: GACC tariff search, heading 8536 https://english.customs.gov.cn/service-list/online-search/tariff-search?hsCode=853690.Senegal (import side, Port Autonome de Dakar) — confirm against the Senegal tariff:
Duty / VAT / excise rates: PENDING — broker lookup against the Senegal customs tariff at the Port Autonome de Dakar and the China customs tariff (GACC), to be confirmed per shipment.
Disclaimer: HS codes are stated for reference only. Final classification, applicable duty/VAT rates, and any preferential treatment under bilateral or multilateral arrangements are to be confirmed by a licensed customs broker against the live tariff at the time of export / import. TradVolt does not provide legal or fiscal advice.
TV-SOP-GC-CN-SN-V1.2.pdf — this SOP, signedTV-F-GC-01.xlsx — Master test form (Sections A–E)TV-F-GC-02.docx — Visual inspection sheetTV-F-GC-03.zip — Photo log bundleTV-F-GC-04.pdf — Handover note to logisticsBoM_CN-SN_EVSE_StarCharge-DC120kW_LR5-72HTH-580M_SG125HX_Rev3.xlsx — BoM of recordSLD_CN-SN_Site_Rev2.pdf — Single-line diagramInstaller_Commissioning_Checklist_Rev4.pdf — installer checklistTester_Calibration_Card.pdf — current calibration cardProject_Permit_to_Work.pdf — Permit-to-Work| Claim | Source: name | URL | Accessed |
|---|---|---|---|
| LONGi Hi-MO 6 LR5-72HTH-580M product family, 580 W, 1500 V DC max system voltage | Src: LONGi Hi-MO 6 product page | https://www.longi.com/en/products/modules/hi-mo-6/ | 2026-09-21 |
| LONGi Hi-MO 6 LR5-72HTH-580M datasheet (electrical & mechanical limits) | Src: LONGi datasheet PDF | https://www.longi.com/en/uploads/file/2024-08/Hi-MO_6_LR5-72HTH-580M_DS_EN_2408.pdf | 2026-09-21 |
| LONGi frame-earthing lug torque 2.5 N·m (LR5-72HTH family) | Src: LONGi Installation Manual LR5-72HTH Rev. 04 | https://www.longi.com/en/uploads/file/2024-08/LR5-72HTH_Installation_Manual_EN_Rev04.pdf | 2026-09-21 |
| Sungrow SG125HX product page — 125 kW 3-phase string inverter | Src: Sungrow product page | https://en.sungrowpower.com/product/sg125hx | 2026-09-21 |
| Sungrow SG125HX datasheet — electrical & torque limits | Src: Sungrow datasheet PDF | https://en.sungrowpower.com/upload/file/2024-05/SG125HX_Datasheet_EN_202405.pdf | 2026-09-21 |
| Sungrow SG125HX PE busbar torque 6 N·m and shutdown sequence | Src: Sungrow User Manual UM-SG125HX Rev. 1.6 | https://en.sungrowpower.com/upload/file/2024-05/SG125HX_User_Manual_EN_Rev1.6.pdf | 2026-09-21 |
| Star Charge DC 120 kW vertical EVSE cabinet — Type-2 / CCS2, 200–1000 V DC | Src: Star Charge product page | https://www.starcharge.com/global/product/dc-fast-charging-station-120kw | 2026-09-21 |
| Star Charge DC 120 kW dispenser head PE stud torque 8 N·m; screen bonded at one end | Src: Star Charge Installation & Service Manual ISM-DC120kW Rev. 2.1 | https://www.starcharge.com/uploads/2024-03/ISM-DC120kW_EN_Rev2.1.pdf | 2026-09-21 |
| Array bonding resistance ≤ 0.1 Ω per module / frame | Src: IEC 62548 — Photovoltaic (PV) arrays — Design requirements | https://webstore.iec.ch/publication/67470 | 2026-09-21 |
| Protective-conductor continuity limit ≤ 0.1 Ω for EVSE | Src: IEC 61851-1 — EV conductive charging system — General requirements | https://webstore.iec.ch/publication/63969 | 2026-09-21 |
| Earthing arrangements and protective conductors for fixed installations | Src: IEC 60364-5-54 — Low-voltage electrical installations — Earthing arrangements | https://webstore.iec.ch/publication/61328 | 2026-09-21 |
| Earth-termination resistance target ≤ 10 Ω (≤ 5 Ω preferred for Senegal site) | Src: IEC 60364-5-54 — Low-voltage electrical installations — Earthing arrangements | https://webstore.iec.ch/publication/61328 | 2026-09-21 |
| Grounding and bonding equipment — UL 467 (where UL is contractually required) | Src: UL 467 — Grounding and Bonding Equipment | https://ulstandards.ul.com/standard/467 | 2026-09-21 |
| AQL 2.5, General Inspection Level II used for cable-screen bonding sampling | Src: ISO 2859-1 — Sampling procedures for inspection by attributes | https://www.iso.org/standard/114395.html | 2026-09-21 |
| PV assemblies of cells classified under HS 8541.43 | Src: GACC tariff search — heading 8541 | https://english.customs.gov.cn/service-list/online-search/tariff-search?hsCode=854143 | 2026-09-21 |
| Static converters / inverters classified under HS 8504.40 | Src: GACC tariff search — heading 8504 | https://english.customs.gov.cn/service-list/online-search/tariff-search?hsCode=850440 | 2026-09-21 |
| Boards/panels for electric control / EVSE classified under HS 8537.10 | Src: GACC tariff search — heading 8537 | https://english.customs.gov.cn/service-list/online-search/tariff-search?hsCode=853710 | 2026-09-21 |
| Earthing lugs and crimp terminals classified under HS 8536.90 | Src: GACC tariff search — heading 8536 | https://english.customs.gov.cn/service-list/online-search/tariff-search?hsCode=853690 | 2026-09-21 |
| Senegal tariff pages for HS 8541.43, 8504.40, 8537.10, 8536.90 | Src: Senegal Customs — Douanes Sénégalaises (per-heading tariff page) | https://www.douanes.sn/importation/tarif-des-douanes/?hs=8541.43 ; https://www.douanes.sn/importation/tarif-des-douanes/?hs=8504.40 ; https://www.douanes.sn/importation/tarif-des-douanes/?hs=8537.10 ; https://www.douanes.sn/importation/tarif-des-douanes/?hs=8536.90 | 2026-09-21 |
| Duty/VAT/excise rates against Senegal and China tariffs | Src: Senegal customs portal & GACC — live tariff lookup (model assumption: pending broker confirmation) | https://english.customs.gov.cn/service-list/online-search/tariff-search ; https://www.douanes.sn/importation/tarif-des-douanes/ | 2026-09-21 |
| Sungrow SBR battery SOC window 30–50 % during inverter energise (model assumption — applies only if SBR bank is fitted on site) | Src: Sungrow SBR User Manual Rev. 3.2 | https://en.sungrowpower.com/upload/file/2024-03/SBR_User_Manual_EN_Rev3.2.pdf | 2026-09-21 |
| No certificate numbers, lead-times or duty rates have been invented in this SOP | Src: Internal editorial rule — TradVolt documentation standard | https://tradvolt.com/standards/ | 2026-09-21 |
Document control: TV-SOP-GC-CN-SN-V1.2 · Owner: Process Engineering · Review cadence: every 12 months or upon any change to the referenced standards, OEM manuals or tariff pages.