China-to-EU Solar Inverter Compliance Gap Matrix

CE marking is a necessary but not sufficient condition. It demonstrates conformity with the applicable EU directives (primarily the Low Voltage Directive 2014/35/EU and EMC Directive 2014/30/EU), but it does not address national grid-connection approval. Each EU member state sets its own technical connection rules for generators connecting to its grid under Commission Regulation (EU) 2016/631 (the NC RfG). An inverter may carry a valid CE mark and still require separate national certification or registration before it can be physically connected to the local distribution network.

At EU level, Commission Regulation (EU) 2016/631 (NC RfG — Network Code on Requirements for Generators) is directly binding law across all member states. CENELEC EN 50549-1 (low-voltage, <=1000 V AC) and EN 50549-2 (medium-voltage, 1-35 kV) are European technical standards commonly used to demonstrate conformity with NC RfG-related DSO requirements for Type A and Type B generating units, but the mandatory obligation is the Regulation and the applicable national/DSO connection approval, not the EN standard itself. At national level, member states or GB overlay additional technical connection rules: Germany uses VDE-AR-N 4105 (LV) and VDE-AR-N 4110 (MV); Great Britain uses Engineering Recommendation G98 (LV, <=16 A) and G99 (larger units); Italy uses CEI 0-21. These national codes can impose requirements beyond EN 50549 — for example specific protection relay settings, reactive power profiles, or anti-islanding methods — meaning EU-level evidence alone does not guarantee acceptance by a national distribution network operator.

No. GB/T 19964 is a Chinese national standard governing technical requirements for photovoltaic power station connections to the power system. While it addresses similar topics — voltage and frequency operating ranges, fault ride-through, reactive power, and power quality — its specific parameter thresholds, grid-protection settings, and test methodologies differ from those in EU Regulation 2016/631 (NC RfG) and common European evidence routes such as EN 50549-1/-2. Compliance with GB/T 19964 does not constitute evidence of conformity under any EU directive or automatically satisfy an EU/DSO grid-connection process. Manufacturers seeking EU market access for grid-tied inverters must satisfy the applicable Regulation and the grid-connection notification or certification procedures required by the relevant national distribution network operator.

A grid-tied PV inverter is typically subject to at least the following EU legislative instruments, each requiring its own conformity assessment route and contributing to the CE marking Declaration of Conformity: (1) Low Voltage Directive (LVD) 2014/35/EU — covers electrical safety of equipment operating between 50 V and 1000 V AC; harmonised standards EN 62109-1 and EN 62109-2 provide a specific safety route for PV power converters. (2) EMC Directive 2014/30/EU — covers electromagnetic emissions and immunity; relevant EN 61000 series standards apply. (3) Radio Equipment Directive (RED) 2014/53/EU — applies if the inverter incorporates any wireless communication interface (e.g. Wi-Fi, Bluetooth, cellular); see also cybersecurity obligations under Delegated Regulation (EU) 2022/30. (4) RoHS Directive 2011/65/EU (recast) — restricts hazardous substances in electrical and electronic equipment. (5) WEEE Directive 2012/19/EU — imposes producer registration and take-back obligations for waste electrical and electronic equipment. Depending on product characteristics, additional instruments such as the Ecodesign Regulation or the Construction Products Regulation may also be relevant.

Delegated Regulation (EU) 2022/30 supplements the Radio Equipment Directive (RED) 2014/53/EU by making Articles 3.3(d), (e), and (f) of RED mandatory for certain categories of wireless devices. These articles cover network protection, privacy safeguards, and fraud prevention. The regulation applies to any radio equipment capable of communicating over the internet — either directly or via another device — which includes grid-tied PV inverters with Wi-Fi, Bluetooth, cellular, or similar wireless interfaces. After a one-year extension of the original deadline, the requirements became mandatory from 1 August 2025. Manufacturers placing such inverters on the EU market on or after that date are required to demonstrate conformity with RED; the harmonised EN 18031 standard series (EN 18031-1, -2, and -3) provides a voluntary route to presumption of conformity.

Under Regulation (EU) 2019/1020 on market surveillance and compliance of products (which came into full effect in July 2021), products covered by EU harmonisation legislation may only be placed on the EU market if there is an identified 'economic operator' established in the Union. For a manufacturer not established in the EU, that obligation is fulfilled by either: (a) an EU-based importer who takes responsibility for placing the product on the market, or (b) an authorised representative who holds a written mandate from the manufacturer and is explicitly designated for the purposes of Article 4 of Regulation 2019/1020. The economic operator must ensure that: the EU Declaration of Conformity and technical documentation are available; their name and address appear on the product or its packaging; and they cooperate with market surveillance authorities if a product presents a risk. This requirement is separate from and additional to the product-specific directive obligations (LVD, EMC, RED, etc.).

In many cases, yes — with important conditions. The EU harmonised standards EN 62109-1:2010 and EN 62109-2:2011 (safety of power converters for use in photovoltaic power systems, under LVD) are technically identical to IEC 62109-1 and IEC 62109-2 respectively. Similarly, the EN 61000 series used for EMC compliance is technically aligned with the corresponding IEC 61000 parts. Where an existing test report was issued against the IEC version and the EN adoption is technically identical with no additional national deviations, a notified body or the manufacturer's internal technical team may be able to rely on those test results when preparing the EU Declaration of Conformity. However, several conditions must be verified: (1) the test report must cover the specific model being placed on the EU market; (2) the report must have been issued by an accredited laboratory with traceability to the relevant standard edition in force; (3) the manufacturer remains solely responsible for the EU DoC — test reports support it but do not replace it; and (4) where a national grid-connection standard (e.g. VDE-AR-N 4105, G98, CEI 0-21) requires additional type-testing beyond the harmonised EN standards, separate testing will be needed regardless of the IEC report. Always verify which edition of the EN standard is currently listed in the Official Journal of the EU as conferring presumption of conformity.

In the EU framework, these terms describe instruments with different legal force and origins. A Directive (e.g. LVD 2014/35/EU, EMC 2014/30/EU) is EU law that member states must transpose into their national legal systems; it sets essential requirements but does not prescribe specific technical solutions. A Regulation (e.g. NC RfG 2016/631, Market Surveillance Regulation 2019/1020) is EU law directly binding in all member states without requiring national transposition; it takes effect as written. A harmonised Standard (e.g. EN 62109-1, EN 50549-1) is a technical document produced by a European Standards Organisation (CEN, CENELEC, or ETSI) under a mandate from the European Commission. When a harmonised standard is referenced in the Official Journal of the EU, products made in accordance with it benefit from a 'presumption of conformity' with the essential requirements of the relevant directive — but use of harmonised standards is voluntary. A manufacturer may choose an alternative technical solution provided they can demonstrate it meets the essential requirements by other means. Understanding this distinction matters because satisfying a standard is evidence of conformity, not a legal obligation in itself, and a product may be legally compliant without following any particular standard.