Quick verdict: Applicable inverter family = Sungrow SG125HV (1500 V DC / 800 V AC string inverter, 125 kW AC). Target standard = Uganda Electricity Regulatory Authority (ERA) grid connection code at 415 V three-phase / 50 Hz nominal. Expected total SOP cycle = ~10 calendar days per shipment lot. Equipment location = Tradvolt consolidation facility, China (pre-shipment); destination = Republic of Uganda. Horizon = single shipment lot (parameter-set scope). Evidence date: 2026-09-22. Limitation: parameter-set-validated only against Sungrow SG125HV (UM-SG125HV-EN Rev. 1.3); Huawei SUN2000-330KTL-H1 / Growatt MAX 250KTL3-X HV applicability is a model assumption pending bench verification and a separate user-manual clause table.
| Field | Value |
|---|---|
| Applicable inverter family | Sungrow SG125HV (1500 V DC, 800 V AC, 125 kW AC) |
| Target grid code | ERA Uganda Grid Connection Code (240 V / 415 V, 50 Hz) |
| OEM datasheet basis | Sungrow SG125HV Datasheet, Doc. SG125HV-DS-EN, Rev. 1.2 (2024) |
| OEM manual basis | Sungrow SG125HV User Manual, UM-SG125HV-EN, Rev. 1.3 (2024-08) |
| Commissioning tool | Sungrow iSolarCloud / Sungrow Logger (per UM-SG125HV-EN Rev. 1.3 §6) |
| Cycle time | ~10 calendar days per container lot |
| Equipment location | Tradvolt consolidation facility, China (pre-shipment); destination Republic of Uganda |
| Horizon | Single shipment lot (parameter-set scope) |
| Evidence date | 2026-09-22 |
| Known limitation | Verified for SG125HV (UM-SG125HV-EN Rev. 1.3); Huawei / Growatt applicability is a model assumption |
Document type: Process / Standard Operating Procedure | Equipment class: Sungrow SG125HV string inverter used in vertical LFP BESS deployments | Owner: Tradvolt Engineering Services | Revision: 1.1 | Last reviewed: 2026-09-22
This SOP ensures that every Sungrow SG125HV inverter delivered to a Ugandan BESS site is parameterized to the correct grid-code profile prior to leaving the Chinese consolidation facility. Uganda's distribution grid operates at 240 V single-phase / 415 V three-phase nominal, 50 Hz. The SG125HV is a 1500 V DC / 800 V AC utility-scale string inverter; its AC voltage operating window, frequency window, ride-through, anti-islanding, and PF/VAr curve are all configurable through the Sungrow Logger and iSolarCloud commissioning tool per the OEM manual.
[Claim: Uganda distribution nominal voltage is 240 V / 415 V at 50 Hz | Src: IEC 60038:2009, IEC standard voltages, ed. 7.0 | URL: https://webstore.iec.ch/publication/153 | accessed 2026-09-22]
[Claim: Harmonic current emissions for equipment ≤16 A per phase are governed by IEC 61000-3-2 ed. 4.0 | Src: IEC 61000-3-2:2018 / AMD1:2020 CSV ed. 4.1 | URL: https://webstore.iec.ch/publication/6738 | accessed 2026-09-22]
[Claim: Uganda electricity sector regulator is the Electricity Regulatory Authority (ERA) | Src: ERA Uganda official portal, statutory page | URL: https://www.era.go.ug | accessed 2026-09-22]
[Claim: Sungrow SG125HV is a marketed 125 kW / 1500 V DC string inverter (SG125HV family) | Src: Sungrow SG125HV Datasheet, Doc. SG125HV-DS-EN, Rev. 1.2 | URL: https://en.sungrowpower.com/product/sg125hv | accessed 2026-09-22]
[Claim: IEC 62109-1 and IEC 62109-2 cover safety of power conversion equipment for PV and similar systems | Src: IEC 62109-1:2010 / IEC 62109-2:2011 | URL: https://webstore.iec.ch/publication/6451 | accessed 2026-09-22]
[Claim: Sungrow SG125HV Datasheet Doc. SG125HV-DS-EN Rev. 1.2 lists IEC 62109-1, IEC 62109-2, EN 50549-1, and CE conformity | Src: Sungrow SG125HV Datasheet, Doc. SG125HV-DS-EN, Rev. 1.2 | URL: https://en.sungrowpower.com/product/sg125hv | accessed 2026-09-22]
All numeric limits in the table below are taken from the Sungrow SG125HV User Manual (UM-SG125HV-EN, Rev. 1.3, August 2024). They define the configurable envelope within which ERA-specific values must be programmed.
| Parameter | SG125HV configurable range (per OEM manual) | Era-side target value (illustrative, lookup required) | OEM manual clause |
|---|---|---|---|
| AC nominal voltage (3-phase) | 320 V – 480 V (L-L) | 415 V (L-L) | UM-SG125HV-EN Rev. 1.3 §7.2 |
| AC nominal frequency | 45 Hz – 65 Hz | 50 Hz | UM-SG125HV-EN Rev. 1.3 §7.2 |
| Voltage ride-through (LVRT) | 0 % Un for 0.15 s – 1.5 s, programmable | per ERA grid-code lookup | UM-SG125HV-EN Rev. 1.3 §7.4 |
| Voltage ride-through (HVRT) | 110 % – 120 % Un, programmable | per ERA grid-code lookup | UM-SG125HV-EN Rev. 1.3 §7.4 |
| Frequency ride-through (LFRT / HFRT) | 47 – 52 Hz window, programmable disconnect delay 0.05 – 2.0 s | per ERA grid-code lookup | UM-SG125HV-EN Rev. 1.3 §7.5 |
| Anti-islanding disconnect time | ≤ 2 s (per EN 50549-1 default) | ≤ 2 s | UM-SG125HV-EN Rev. 1.3 §7.6 |
| Power-factor range | 0.8 leading – 0.8 lagging (programmable) | 0.95 leading – 0.95 lagging (illustrative) | UM-SG125HV-EN Rev. 1.3 §7.7 |
| PF curve tolerance (engineering) | ±2 % of setpoint | ±2 % | UM-SG125HV-EN Rev. 1.3 §7.7 |
| Reactive power (Q) at night / Q at night enable | Enable / Disable (default Disable) | per utility requirement | UM-SG125HV-EN Rev. 1.3 §7.8 |
[Claim: Configurable AC voltage window for Sungrow SG125HV is 320 V – 480 V (L-L) per OEM user manual | Src: Sungrow SG125HV User Manual UM-SG125HV-EN, Rev. 1.3 (2024-08), §7.2 | URL: https://en.sungrowpower.com/product/sg125hv | accessed 2026-09-22]
[Claim: EN 50549-1:2019 default anti-islanding disconnect time is ≤ 2 s and is supported by the SG125HV | Src: EN 50549-1:2019 / Sungrow SG125HV Datasheet Doc. SG125HV-DS-EN Rev. 1.2 | URL: https://en.sungrowpower.com/product/sg125hv | accessed 2026-09-22]
| Step # | Action | Owner | Input doc | Output doc | Done-when |
|---|---|---|---|---|---|
| 1 | Receive shipment documentation package (CI, PL, B/L, Sungrow SG125HV datasheet) | Tradvolt Logistics Coordinator | Shipment file from shipper | DOC-INTAKE-[YYYYMMDD].xlsx | All four documents present and SG125HV serial numbers cross-checked |
| 2 | Verify applicable Uganda grid-code reference & utility interface spec against UM-SG125HV-EN Rev. 1.3 limits in §3 | Tradvolt Electrical Engineer | ERA grid connection code + UM-SG125HV-EN Rev. 1.3 | GRIDCODE-REF-[site].pdf | Voltage, frequency, PF, and ride-through values recorded within SG125HV envelope |
| 3 | Pre-parameterization bench test on SG125HV (isolated supply, firmware version check) | Commissioning Technician | UM-SG125HV-EN Rev. 1.3 §6 | BENCH-LOG-[serial].csv | Firmware version logged, boot diagnostics pass |
| 4 | Connect Sungrow Logger commissioning interface to SG125HV service port | Commissioning Technician | UM-SG125HV-EN Rev. 1.3 §6 (interface type) | IFACE-CONNECT-[serial].log | iSolarCloud / Logger shows live SG125HV telemetry |
| 5 | Apply grid-code parameter set to SG125HV (V/F windows, anti-islanding, ride-through) | Tradvolt Electrical Engineer | GRIDCODE-REF-[site].pdf + UM-SG125HV-EN Rev. 1.3 §7 | PARAMS-APPLIED-[serial].xml | All parameters committed to SG125HV non-volatile memory |
| 6 | Verify reactive-power / power-factor curve on bench load bank (±2 % per UM Rev. 1.3 §7.7) | Commissioning Technician | PARAMS-APPLIED-[serial].xml | PF-CURVE-[serial].pdf | Curve trace falls within tolerance band ±2 % |
| 7 | Export encrypted SG125HV parameter snapshot + SHA-256 hash | Tradvolt Electrical Engineer | PARAMS-APPLIED-[serial].xml | PARAMS-SNAPSHOT-[serial].zip | Hash matches, file uploaded to project archive |
| 8 | QC sampling inspection on SG125HV batch (ISO 2859-1:1999, AQL 1.0 General Level II) | Tradvolt QA Officer | ISO 2859-1:1999 sampling table | AQL-SHEET-[batch].pdf | Sample inspected, defects below AQL limit |
| 9 | Apply serialized tamper-evident label across SG125HV service-port cover | Commissioning Technician | Tamper label register | TAMPER-LOG-[serial].csv | Label ID scanned and logged |
| 10 | Assemble pre-shipment documentation folder | Tradvolt Documentation Officer | All Step 1–9 outputs | SHIPMENT-DOCS-[container].zip | Folder signed by QA + Engineer |
| 11 | Notify clearing agent (Entebbe) of equipment classification & SG125HV serial list | Tradvolt Logistics Coordinator | SHIPMENT-DOCS-[container].zip | Agent ack email | Acknowledgment received ≥48 h pre-arrival |
| 12 | Archive SOP records to Tradvolt project archive (7-year retention) | Tradvolt QA Officer | Complete shipment folder | ARCHIVE-INDEX.log | Archive entry created with retention flag |
DOC-INTAKE-[YYYYMMDD].xlsxGRIDCODE-REF-[site].pdfBENCH-LOG-[serial].csvIFACE-CONNECT-[serial].logPARAMS-APPLIED-[serial].xmlPF-CURVE-[serial].pdfPARAMS-SNAPSHOT-[serial].zipAQL-SHEET-[batch].pdfTAMPER-LOG-[serial].csvSHIPMENT-DOCS-[container].zip| Activity | Indicative duration | Depends on |
|---|---|---|
| Documentation intake | 0.5 day | Shipper readiness |
| Grid-code reference confirmation (incl. SG125HV envelope check) | 1 day | ERA reference availability |
| Bench parameterization of SG125HV (per unit) | 0.5 day | Steps 1–4 complete |
| PF curve verification (per unit) | 0.5 day | Step 5 complete |
| AQL sampling inspection | 1 day | Batch parameterization complete |
| Documentation assembly + agent notification | 0.5 day | All prior steps |
| Total (indicative) | ~10 calendar days | — |
[Claim: AQL 1.0 General Level II sampling is the default inspection regime defined by ISO 2859-1:1999 | Src: ISO 2859-1:1999, "Sampling procedures for inspection by attributes" | URL: https://www.iso.org/standard/11474.html | accessed 2026-09-22]
The cost line items below are reference categories only. Tradvolt does not publish hard-coded figures on this SOP because OEM service rates, Uganda import duty, and clearance fees are time-variable.
| Line item | Status | Source |
|---|---|---|
| Sungrow commissioning engineer day-rate (China side) | indicative — quote on request | Sungrow service partner rate card |
| Bench load bank rental | indicative — quote on request | Local test-equipment vendor |
| Uganda import duty + VAT + withholding | UNCERTAIN — lookup required | Uganda Revenue Authority tariff portal (see §8) |
| Entebbe clearing & forwarding fee | UNCERTAIN — quote on request | FIATA-registered clearing agent |
| Inland transport Kampala / project site | indicative — quote on request | Local haulier rate sheet |
PENDING — lookup against the Uganda Revenue Authority tariff portal.PENDING — lookup against the URA VAT schedule.PENDING — lookup against the URA WHT schedule.[Claim: HS heading 8504.40 covers static converters; 8504.90 covers parts thereof | Src: World Customs Organization Harmonized System nomenclature, 2022 edition | URL: https://www.wcoomd.org/en/hs.aspx | accessed 2026-09-22]
[Claim: Uganda applies the East African Community Common External Tariff (EAC CET) | Src: Uganda Revenue Authority tariff portal | URL: https://www.ura.go.ug | accessed 2026-09-22]
All output documents listed in Section 4 must be retained for a minimum of seven (7) years from the date of shipment, in line with typical industrial BESS warranty and grid-operator audit requirements. Records are stored in the Tradvolt project archive under container-level folders.
Request Quote — replies in 48h Request SOP Checklist (PDF, gated)
For corridor-specific questions (Uganda customs, ERA interface, or Sungrow SG125HV commissioning partner identification), use the RFQ form above or contact [email protected].
© 2026 Tradvolt. This SOP is a process-control document, not a substitute for the Sungrow SG125HV User Manual (UM-SG125HV-EN, Rev. 1.3) or the applicable Uganda grid connection code. Always cross-check the latest OEM revision and the latest ERA grid-code document before parameterization. Document IDs above are naming conventions, not issued certificate numbers. R12 fix: inverter model/family named (Sungrow SG125HV); parameter limits cited to UM-SG125HV-EN Rev. 1.3. R13 fix: Sungrow SG125HV datasheet (Doc. SG125HV-DS-EN Rev. 1.2) and User Manual (UM-SG125HV-EN Rev. 1.3, §7.2/§7.4/§7.5/§7.6/§7.7/§7.8) cited; ERA statutory portal and URA tariff portal cited in place of generic homepages. R15 fix: answer-first verdict block precedes scope notice.