CROSS-STANDARD public interest · Solar PV inverter

China-to-Uzbekistan Solar PV Inverter Compliance Gap Matrix

AI-compiled from official public sources — cross-checked by multiple AI models, not human-verified. Informational only; see disclaimer. Public-interest, source-linked comparison of common China solar PV inverter documentation against Uzbekistan O'zstandart conformity certification, O'z DSt / GOST / IEC evidence, national grid-operator (Uzenergo) connection requirements, IFC/EBRD lender technical specifications for internationally-financed projects, and 50 Hz grid expectations.

Dataset 2026-06-11 Last verified 2026-06-14 7 rows

GAP MATRIX

Compliance Gap Matrix

Gap matrix
Compliance item Common China baseline Uzbekistan (O'zstandart / Uzenergo) Gap / action Source + verification date
50 Hz Grid Frequency and Uzbekistan Parameter Settings China also uses 220/380 V, 50 Hz, so the nominal voltage and frequency label aligns. The difference is in protection bands, ride-through curves, active-power frequency response, reconnection logic, and operator-specific commissioning evidence under GB/T 19964-2024 and GB/T 37408-2021 versus Uzbekistan network-operator requirements.GB/T 19964-2024
GB/T 37408-2021
China 220/380 V, 50 Hz grid settings		 Uzbekistan's national power system operates on a nominal 220/380 V, 50 Hz frequency (CIS legacy, same nominal voltage class as China). PV inverter firmware, protection thresholds, ride-through settings, frequency-watt behavior, reconnection timing, and commissioning records should be configured to the Uzbekistan project and the relevant grid-operator's technical conditions (National Electric Grid of Uzbekistan / regional energy companies) rather than left at China factory defaults.Uzbekistan national power-system nominal: 220/380 V, 50 Hz
National Electric Grid of Uzbekistan / regional energy company technical conditions for project-specific protection and frequency settings
O'z DSt / GOST grid-protection standards where applicable
Project commissioning and acceptance records		 The voltage and frequency labels align, but grid-code settings may not. Exporters should provide Uzbekistan-specific parameter profiles, locked settings evidence where required, commissioning screenshots or logs, and a method for verifying settings after firmware updates. Internationally-financed projects may additionally require IEC 62116 anti-islanding test evidence regardless of local minimums.[INFORMATIONAL] China and Uzbekistan both use 220/380 V, 50 Hz, but Uzbekistan grid-connection acceptance still requires local protection and operating-parameter confirmation with the relevant network operator. Ministry of Energy of the Republic of Uzbekistan2026-06-14 · unverified
China GB/T 37408 and GB/T 19964-2024 Evidence Versus Uzbekistan Acceptance GB/T 37408-2021 is the common China product technical requirement for PV grid-connected inverters, and GB/T 19964-2024 is the common China technical regulation for PV power stations connected to the power system. Together they are a strong China-side dossier, but they do not create O'zstandart certification rights, Uzbekistan project-auction eligibility, or Uzenergo grid approval.GB/T 37408-2021
GB/T 19964-2024		 Uzbekistan import, market-access, and grid-connection decisions are based on O'zstandart conformity certification, O'z DSt national standards (many derived from GOST or IEC), and project/network-operator approvals. Chinese GB/T reports are best treated as capability evidence to be mapped against Uzbekistan O'zstandart and O'z DSt/GOST/IEC requirements, not as automatically recognized conformity documents. O'zstandart mandatory certification is the market-access gate for regulated electrical products.O'zstandart mandatory conformity certification for regulated electrical products
O'z DSt national standards (many derived from GOST / IEC) for PV inverters
National Electric Grid of Uzbekistan / regional energy company connection technical conditions		 The key gap is recognition and mapping. Exporters should prepare a clause-by-clause bridge from GB/T 37408 and GB/T 19964-2024 to O'z DSt/GOST/IEC 62109 requirements, O'zstandart conformity certification, project grid-code settings, Uzbek-language user and installation documentation, and any lender technical specifications demanded by IFC/EBRD or project financiers.[INFORMATIONAL] GB/T 37408 and GB/T 19964-2024 are useful starting evidence, but Uzbekistan compliance requires separate O'zstandart certification, O'z DSt/GOST/IEC standards mapping, grid approval, and project-specific documentation. National Public Service Platform for Standards Information, State Administration for Market Regulation of China2026-06-14 · unverified
O'zstandart Mandatory Conformity Certification for PV Inverters China-side PV inverter conformity commonly relies on GB/T 37408-2021, manufacturer safety testing, and IEC 62109 CB scheme reports for export. These are useful due-diligence inputs for building an O'zstandart technical file but do not substitute for the mandatory Uzbekistan conformity certificate, accredited-body testing, or O'zstandart marking obligations.GB/T 37408-2021
IEC 62109-1
IEC 62109-2
IECEE CB Scheme reports where available		 Uzbekistan's Agency for Technical Regulation (O'zstandart) operates mandatory conformity certification for regulated electrical products placed on the Uzbekistan market. Solar PV inverters in the regulated product scope require an O'zstandart certificate of conformity before import or sale. The applicant (local importer, representative, or authorized manufacturer) must engage an accredited Uzbekistan conformity body, provide technical documentation and test reports based on O'z DSt or GOST standards (often IEC-aligned), and mark the product accordingly. O'zstandart publishes the list of products subject to mandatory certification.O'z DSt national standards for PV inverters and electrical safety
GOST / IEC-aligned standards adopted by O'zstandart
O'zstandart mandatory product certification list and procedures
Uzbekistan technical regulation on product conformity assessment		 A Chinese GB/T or IEC safety report does not by itself authorize import or sale in Uzbekistan. The gap is O'zstandart procedure, accredited-body engagement, certificate of conformity, Uzbek/Russian-language technical documentation, and product marking. Exporters should verify whether the inverter model is in the current mandatory certification scope and identify a local applicant or authorized representative.[INFORMATIONAL] Treat O'zstandart mandatory conformity certification as the primary Uzbekistan market-access gate; GB/T 37408 or IEC 62109 reports support the technical file but do not replace the certificate. Agency for Technical Regulation (O'zstandart), Republic of Uzbekistan2026-06-14 · unverified
EMC Conformity for Grid-Connected Inverters in Uzbekistan China-side packages often include GB/T 37408-2021, GB/T 19964-2024, and EMC test evidence generated for IEC/CISPR or other export markets. Those reports may help build an O'zstandart technical file but must be checked against the O'z DSt / GOST EMC standards required by the Uzbekistan conformity body and whether test conditions, model scope, and firmware version are consistent.GB/T 37408-2021
GB/T 19964-2024
CISPR 11 / IEC 61000 series test evidence where available		 PV inverters with electronic power-conversion circuits and grid interfaces may require EMC conformity evidence under Uzbekistan O'z DSt / GOST EMC standards as part of O'zstandart conformity certification. Relevant O'z DSt or GOST standards are often derived from IEC 61000 / CISPR series. The technical file should address emissions, immunity, installation conditions, cabling, filters, and operating modes relevant to grid-connected inverter use.O'z DSt / GOST EMC standards for electrical equipment (IEC 61000 / CISPR series-derived)
O'zstandart mandatory conformity certification technical-file requirements for EMC-relevant products
IEC 62109 EMC provisions where referenced by O'zstandart or project specifications		 The practical gap is not only test limits. The O'zstandart file must match the exact model, firmware, filters, manuals, and intended installation. EMC reports prepared for China or another export market may need delta review, standard-mapping, or retesting against O'z DSt / GOST requirements specified by the accredited Uzbekistan conformity body.[INFORMATIONAL] EMC reports from China or other markets should be treated as input evidence, not as automatic O'z DSt / GOST EMC compliance for Uzbekistan O'zstandart certification. Agency for Technical Regulation (O'zstandart), Republic of Uzbekistan2026-06-14 · unverified
O'z DSt / GOST / IEC 62109 Safety Evidence Chinese manufacturers often hold IEC 62109 CB scheme reports alongside GB/T 37408-2021 product documentation. For Uzbekistan export, particularly internationally-financed projects, IEC 62109 CB evidence is stronger than a China-only GB/T declaration. However, it still needs model-scope, factory, firmware, and national-deviation review for O'zstandart certification use, and must be supplemented by IEC 62116 anti-islanding evidence where lenders require it.GB/T 37408-2021
IEC 62109-1
IEC 62109-2
IECEE CB Scheme reports where available		 Uzbekistan standards practice uses O'z DSt national standards, GOST interstate standards, and IEC-aligned standards through O'zstandart conformity routes. For PV inverters, IEC 62109-1 and IEC 62109-2 safety reports (Safety of power converters for use in photovoltaic power systems) are commonly relevant technical evidence, especially when a purchaser, bank, EPC contractor, or conformity body asks for internationally recognized inverter safety documentation. Internationally-financed projects (ACWA Power, Masdar, IFC/EBRD-backed) routinely specify IEC 62109 test reports as a minimum lender technical requirement regardless of local minimums.O'z DSt national standards and Uzbekistan national standardization procedures
GOST interstate standards where adopted or referenced
IEC 62109-1 / IEC 62109-2 — Safety of power converters for use in photovoltaic power systems
IEC 62116 — Test procedure of islanding prevention measures for utility-interconnected inverters
IEC 61727 — Photovoltaic (PV) systems — Characteristics of the utility interface
IFC/EBRD lender technical specifications for internationally-financed PV projects		 Uzbekistan buyers and O'zstandart conformity bodies may accept IEC 62109 as persuasive technical evidence, but the acceptance path is contractual or body-specific. For IFC/EBRD lender-financed projects IEC 62109 (and often IEC 62116) is a firm requirement. Exporters should not assume IEC 62109 automatically resolves O'z DSt, GOST, O'zstandart certification, language, marking, or grid-connection requirements.[INFORMATIONAL] IEC 62109 and CB reports are useful — and for IFC/EBRD-financed projects often mandatory — but should be mapped into the O'zstandart / O'z DSt / GOST file and not treated as a standalone Uzbekistan approval. International Electrotechnical Commission (IEC)2026-06-14 · unverified
Uzenergo / Network Grid-Connection Review China-side grid documentation usually references GB/T 19964-2024 for PV power-station grid connection and GB/T 37408-2021 for inverter technical requirements. These documents are useful for explaining inverter capability and design basis but do not substitute for Uzbekistan network studies, Uzenergo or regional-company technical conditions, or commissioning acceptance.GB/T 19964-2024
GB/T 37408-2021		 Utility-scale PV projects connected to Uzbekistan's national or regional electricity networks require project-specific grid-connection review, technical conditions, protection settings, power-quality evidence, dispatch or telemetry interfaces, and commissioning documentation. The National Electric Grid of Uzbekistan (Uzenergo) and regional energy companies set connection technical conditions for their respective networks. Grid-connection requirements are issued as technical conditions (teknicheskie usloviya) specific to the project, capacity, and connection point.National Electric Grid of Uzbekistan (Uzenergo) technical conditions for grid connection
Regional energy company connection requirements for distribution-level projects
Uzbekistan electricity grid regulations and power-system connection procedures
Project-specific dispatch, protection, metering, and telemetry requirements
O'z DSt / GOST power-quality and grid-protection standards		 The gap is project engineering: Uzbekistan protection, voltage/reactive-power, frequency, SCADA, metering, fault-ride-through, and commissioning settings must be agreed with the relevant network operator and documented in project-specific technical conditions. A China grid-code test certificate is not sufficient for energization. For internationally-financed projects, lender independent engineers (IFC/EBRD) will additionally review grid-connection documentation against IEC standards.[INFORMATIONAL] GB/T 19964-2024 and GB/T 37408 help describe inverter capability, but Uzbekistan energization depends on Uzenergo or regional-company technical conditions, project-specific commissioning evidence, and, for financed projects, lender independent-engineer acceptance. Ministry of Energy of the Republic of Uzbekistan2026-06-14 · unverified
IFC / EBRD Lender Technical Specifications for Internationally-Financed PV Projects Chinese domestic PV project documents usually focus on local grid approval, GB/T 19964-2024 connection evidence, equipment type-test reports under GB/T 37408-2021, and domestic project acceptance. For internationally-financed Uzbekistan projects, the China-side dossier must be supplemented with IEC-scheme test evidence to satisfy lender independent-engineer review. A manufacturer holding both IEC 62109 CB and IEC 62116 reports is in a stronger position for Uzbekistan internationally-financed project qualification.GB/T 37408-2021
GB/T 19964-2024
China domestic project acceptance documents		 Uzbekistan's large-scale PV build-out (ACWA Power, Masdar, and other internationally-financed projects) frequently involves IFC, EBRD, ADB, or similar development-finance lenders who appoint independent engineers and set lender technical specifications. These specifications typically demand IEC test evidence for inverters regardless of local O'zstandart minimums: IEC 62109-1/2 (safety), IEC 62116 (anti-islanding), and IEC 61727 (grid characteristics) are commonly required. Lender technical specs may also set minimum performance ratio requirements, SCADA standards, and operational warranties that exceed Uzbekistan domestic regulatory minimums.IFC / EBRD / ADB lender technical specifications for PV projects in Uzbekistan
IEC 62109-1 / IEC 62109-2 — Safety of power converters for use in photovoltaic power systems
IEC 62116 — Test procedure of islanding prevention measures for utility-interconnected inverters
IEC 61727 — Photovoltaic (PV) systems — Characteristics of the utility interface
IFC Performance Standards on Environmental and Social Sustainability (project-level)
EBRD Environmental and Social Policy (project-level)		 For internationally-financed Uzbekistan projects, inverter documentation must satisfy both O'zstandart national certification and lender independent-engineer IEC-based technical review. The gap between a China-only GB/T dossier and lender requirements is significant: missing IEC 62109, IEC 62116, or IEC 61727 test evidence, or inverter models not listed in a lender-approved equipment list, can block project financial close or commissioning sign-off.[INFORMATIONAL] For internationally-financed Uzbekistan PV projects, IEC 62109, IEC 62116, and IEC 61727 test evidence is typically a lender hard requirement; GB/T-only dossiers should be supplemented before project financial close. International Finance Corporation (IFC), World Bank Group2026-06-14 · unverified

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