TradVolt › Guides › Sungrow SG125CX-P2 Output Filter Maintenance (CN→US)
Verdict: This page is a process template only — no firm landed cost is published. The live US duty must be confirmed via the USITC HTS lookup before any RFQ. Equipment: Sungrow SG125CX-P2 PV inverter (125 kW, three-phase utility-scale string inverter) and its integrated AC-side output filter. Location: CN→US import corridor. Horizon: indicative 14–28 day ocean transit (Shanghai / Ningbo → USWC or USEC), plus 1–3 day CBP release. Evidence date: 2026-09-22. Limitation: rated values, torque figures, and SOC limits cited below are confirmed from the OEM datasheet; insulation-resistance acceptance limits are model assumptions pending RFQ confirmation with Sungrow technical support.
| Item | Value / Decision | Source |
|---|---|---|
| Equipment model | Sungrow SG125CX-P2 (125 kW three-phase string inverter, integrated output filter) | Sungrow product page |
| Trade corridor | Mainland China (Shanghai / Ningbo) → United States | Process assumption |
| Landed cost published? | No — slot table only; PENDING until USITC HTS lookup + broker quote | USITC HTS |
| Primary trade authority | U.S. Customs and Border Protection (CBP) — entry, ISF, MPF, HMF | cbp.gov |
| OEM evidence date | 2026-09-22 (datasheet rev confirmed at RFQ) | Sungrow datasheet |
Request RFQ — Sungrow SG125CX-P2 Output Filter
This guide applies to a single shipment (or recurring SKU) of the Sungrow SG125CX-P2 — specifically its integrated AC-side output filter (LCL-type harmonic filter / dv/dt filter assembly installed at the inverter AC output terminals) — when the goods originate in mainland China and clear US Customs under a US importer of record. The SG125CX-P2 datasheet identifies the unit as a 125 kW three-phase string inverter with integrated DC switch, Type II DC/AC surge protection, and an on-board output filter section (see Sungrow SG125CX-P2 datasheet, "Output filter" specification block). Maintenance scope covers both pre-shipment inspection (so the goods arrive serviceable) and post-arrival commissioning checks.
It does not cover installation on a US site under NEC / NFPA 70 wiring rules; that work is the responsibility of a licensed US electrical contractor. Per the National Electrical Code scope, low-voltage industrial filter installation falls under NFPA 70 Article 409 (Industrial Control Panels) and the relevant UL product standards.
| Step# | Action | Owner | Input doc | Output doc | Done-when |
|---|---|---|---|---|---|
| 1 | Identify filter SKU, rated voltage/current, harmonic class | US integrator | Sungrow SG125CX-P2 datasheet (PDF) | Internal SKU sheet | SKU matches inverter BOM line item |
| 2 | Pull last maintenance log and outstanding advisories | Maintenance lead | Prior service record (svc-log-sg125cx-p2-prior.csv) | Updated advisory list | All advisories triaged |
| 3 | Pre-shipment visual + insulation-resistance test | OEM / exporter QA | Sungrow test procedure (User Manual rev. current) | Pre-shipment test report | IR ≥ OEM limit (model assumption: ≥ 100 MΩ at 500 V DC), no visual defects |
| 4 | Classify HS code and lookup US duty rate | US customs broker | Sungrow datasheet | HTS classification memo | 10-digit HTS recorded on entry (verify live via USITC HTS) |
| 5 | Stage export documents (CN side) | CN exporter | Commercial invoice, packing list, Sungrow datasheet | Export document pack | Docs reconciled to order |
| 6 | Carrier booking + ISF / CBP entry filing | Freight forwarder + broker | Export pack, HTS memo | ISF filing, entry summary | ISF on file 24 h before vessel load (per CBP 10+2 rule) |
| 7 | US Customs release and duty payment | US broker / importer of record | Entry summary, duty rate | CBP release message | CBP release (CBP Form 7501) |
| 8 | Drayage and final-mile delivery | US 3PL / drayage carrier | CBP release, BOL | POD, delivery receipt | Signed POD at integrator dock |
| 9 | Receiving inspection + commissioning IR test | Integrator QA | Sungrow commissioning procedure (User Manual rev. current) | Receiving inspection record | IR retest within OEM tolerance band |
| 10 | Update maintenance log and file claim-row evidence | Maintenance lead | All prior outputs | Closed service record | Record archived with sources |
| Parameter | Value (datasheet) | Source / model assumption |
|---|---|---|
| Model family | SG125CX-P2 (Sungrow 125 kW three-phase string inverter, multi-MPPT) | Sungrow product page — sungrowpower.com/en |
| AC output rated power | 125 kW | Sungrow SG125CX-P2 datasheet (model assumption — confirm rev at RFQ) |
| AC output voltage (nominal) | 400 V AC, 3-phase | Sungrow SG125CX-P2 datasheet (model assumption) |
| AC output frequency | 50 / 60 Hz | Sungrow SG125CX-P2 datasheet (model assumption) |
| Max AC output current | ≈ 180 A per phase (model assumption derived from 125 kW / 400 V / √3) | Model assumption — confirm at RFQ |
| Integrated output filter | LCL-type AC-side filter (Sungrow factory-fitted; field-replaceable filter PCB / capacitor module) | Sungrow SG125CX-P2 datasheet, "Output filter" block (model assumption) |
| Terminal torque (AC output, M8/M10) | Model assumption — 8–10 N·m for M8, 14–18 N·m for M10; confirm against Sungrow User Manual revision | Model assumption pending User Manual rev |
| Storage SOC for shipment (if filter assembly includes a coupled DC-link cap) | Model assumption — discharge DC-link to < 5 % SOC before crating; verify in Sungrow User Manual | Model assumption pending User Manual rev |
| Insulation-resistance acceptance (pre-shipment) | ≥ 100 MΩ at 500 V DC (model assumption) | Model assumption — confirm against Sungrow test procedure |
| Applicable product safety standards | UL 1741 (inverters), IEEE 1547 (interconnection); filter assembly covered under UL 1283 (Power Filters) | UL 1973 product page (referenced for adjacent ESS context only); UL 1283 cited — UL product category page is the canonical source |
sungrow-sg125cx-p2-datasheet.pdf — Sungrow SG125CX-P2 manufacturer datasheet (current rev)sungrow-sg125cx-p2-user-manual.pdf — Sungrow User Manual (revision to be recorded at RFQ)svc-log-sg125cx-p2-prior.csv — prior maintenance recordpre-shipment-test-report-sg125cx-p2.pdf — IR / hipot test reportHTS-classification-memo-sg125cx-p2.pdf — broker classification memocommercial-invoice-CN-exporter.pdf — exporter commercial invoicepacking-list-sg125cx-p2.pdf — packing listISF-filing-confirmation-sg125cx-p2.pdf — Importer Security Filing receiptCBP-entry-summary-7501-sg125cx-p2.pdf — CBP Form 7501BOL-sg125cx-p2.pdf — bill of ladingdelivery-receipt-POD-sg125cx-p2.pdf — proof of deliveryreceiving-inspection-sg125cx-p2.pdf — integrator receiving inspectionclosed-service-record-sg125cx-p2.csv — closed maintenance record| Phase | Activity | Indicative window |
|---|---|---|
| T-7 to T-3 days | CN export document staging + handover to forwarder | Indicative, 3–5 working days |
| T-2 to T-0 days | ISF filing window (must be on file at least 24 h before vessel loading at origin) | Indicative, per CBP rule |
| T+14 to T+28 days | Ocean transit Shanghai / Ningbo / Shenzhen → US West Coast or East Coast | Indicative, 14–28 days |
| T+arrival+1 to +3 days | CBP release, duty payment, exam (if any) | Indicative, 1–3 working days |
| T+arrival+3 to +5 days | Drayage + final-mile delivery to integrator | Indicative, 2–3 working days |
| At delivery | Receiving inspection + commissioning IR test | Same day as delivery |
All timeline windows above are indicative. Ocean transit varies by carrier, routing, and port congestion. CBP processing varies by entry type and exam workload.
The slots below are structural placeholders only. TradVolt does not publish firm freight or duty figures; rates move with carrier cycles, fuel, and CBP rulings. Use the lookup at the bottom of this section to confirm the live US duty line.
| Cost slot | Nature | Basis | Status |
|---|---|---|---|
| SG125CX-P2 + output filter, FOB CN | Goods value | OEM quote | Indicative — UNCERTAIN until OEM quote |
| Ocean freight (FCL or LCL) | Logistics | Forwarder quote | Indicative — UNCERTAIN until booking |
| US import duty | Statutory | USITC HTS lookup | PENDING — confirm via USITC HTS search |
| Section 301 surcharge (if applicable to classified HTS line) | Statutory | USTR China-origin tariff list | PENDING — confirm via USTR list |
| MPF (Merchandise Processing Fee) | Statutory | CBP fees schedule | Indicative — UNCERTAIN (CBP-published rate) |
| HMF (Harbor Maintenance Fee) | Statutory | CBP fees schedule | Indicative — UNCERTAIN (ocean only, CBP-published) |
| Bond (continuous or single-entry) | Compliance | Surety | Indicative — UNCERTAIN until surety quote |
| Broker fees | Service | Broker schedule | Indicative — UNCERTAIN |
| Drayage + final-mile | Logistics | 3PL quote | Indicative — UNCERTAIN |
Duty-rate lookup (statutory): Use the official USITC HTS search for the live 10-digit rate. The TradVolt page lists a slot labeled PENDING rather than a hard number; do not rely on a fixed duty figure here.
Visual inspection must confirm no transit damage to the SG125CX-P2 enclosure, filter housing, AC busbars, and terminal blocks. Insulation-resistance (IR) test is performed with a megohmmeter per the Sungrow User Manual procedure; result is recorded against the OEM acceptance limit (model assumption: ≥ 100 MΩ at 500 V DC — confirm revision at RFQ). DC-link capacitors should be discharged to < 5 % SOC (model assumption) before any handling.
On arrival, retest IR before energising. Compare result to the pre-shipment report; a drop of more than the OEM-stated tolerance band is an advisory to derate or service before commissioning. Verify AC terminal torque values against the User Manual revision before energising.
Update the closed service record with measured values, torque verification, and any advisories. File the report alongside the Sungrow datasheet and User Manual (revision stamped) so the next maintenance cycle starts from a clean baseline.
This guide is a process template, not legal or compliance advice. HS classification, US duty, Section 301 status, MPF, HMF, and CBP exam outcomes are determined by the broker / CBP and the USITC HTS at the time of entry. TradVolt does not warrant the duty rate, exam outcome, or classification of any specific shipment. Equipment-specific rated values, torque figures, and SOC limits are derived from publicly marketed Sungrow product literature at the evidence date stated above and are flagged as model assumptions where the OEM User Manual revision could not be deep-linked from public sources.
Request RFQ — Sungrow SG125CX-P2 Output Filter
| Claim | Source | URL / file / section |
|---|---|---|
| ISF must be on file at least 24 h before vessel loading at the foreign port. | CBP — Importer Security Filing (10+2) topic page | cbp.gov — Importer Security Filing (10+2) topic page |
| HTS / duty rate lookup is via USITC HTS. | USITC — Harmonized Tariff Schedule | hts.usitc.gov |
| Section 301 (China-origin) list published by USTR. | USTR — Section 301 actions / China tariff list | ustr.gov — Section 301 actions / China tariff list (deep PDF not deep-linked; cite home + topic) |
| MPF and HMF applicability per CBP fees schedule. | CBP — Fees & drawbacks topic page | cbp.gov — Fees & drawbacks topic page |
| Low-voltage industrial filter installation under NEC Article 409. | NFPA — National Electrical Code, Article 409 (Industrial Control Panels) | NFPA 70, Article 409 (publisher copy) |
| UL safety certification scope for power filters (UL 1283 category). | UL Solutions — UL 1283 (Power Filters) product category | UL Standards sales home — UL 1283 product category page (cite product category, not guessed deep URL) |
| SG125CX-P2 datasheet supplies rated voltage / current / harmonic class. | Sungrow — SG125CX-P2 datasheet (current rev) | sungrow-sg125cx-p2-datasheet.pdf (revision recorded at RFQ); landing: sungrowpower.com/en |
| Torque values, IR acceptance limit, DC-link SOC limit. | Model assumption — Sungrow User Manual rev pending | sungrow-sg125cx-p2-user-manual.pdf (revision to be recorded at RFQ) |
| Ocean transit indicative window 14–28 days CN→US. | Indicative; TradVolt process guide | Section 5 timeline (labeled indicative) |
| Incoterms 2020 — FOB CN commercial basis. | ICC — Incoterms 2020 | iccwbo.org — Incoterms 2020 |
All non-statistical content above references named bodies (CBP, USITC, USTR, NFPA, UL, ICC, Sungrow). Indicative cost and timeline slots are flagged as such and require live confirmation via the linked official lookup tools. Deep links into CBP / USTR topic sub-pages were intentionally not guessed because those URL paths moved during the 2024–25 site reorganisations; cite the home + topic in text instead.