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The IEC 62109 standard mainly consists of two parts: IEC 62109-1 and IEC 62109-2. Among them, IEC 62109-1 stipulates the general safety requirements for solar inverters, covering aspects such as electrical safety, mechanical safety, electromagnetic compatibility, and environmental adaptability. Meanwhile, IEC 62109-2 puts forward special requirements for inverters under specific application environments or with specific functions, such as the reliability requirements under harsh environments like high temperature, high humidity, and high altitude, as well as the performance requirements for the special functions equipped with the inverters (such as DC circuit breakers, partial failure detection, etc.).

The inverter certification test items in IEC 62109-1:2010 include:

1. Electrical Safety Tests:

Insulation Resistance Test

Dielectric Strength Test

Ground Continuity Test

Leakage Current Test

Overcurrent and Short-circuit Protection Test

Overvoltage and Undervoltage Protection Test

Overtemperature Protection Test

2. Mechanical Safety Tests:

Enclosure Protection Level Test

Impact and Vibration Resistance Test

Structural Integrity Test

3. Environmental Tests:

Temperature Cycling Test

Humidity Test

Salt Spray Corrosion Test

Dustproof Test

4. Functional Tests:

Output Voltage and Frequency Accuracy Test

Harmonic Distortion Test

Efficiency Test

Load Transient Response Test

5. Other Tests:

Electromagnetic Compatibility (EMC) Test

Acoustic Emission Test

Fire Resistance Test (for certain applications)

The specific test items may vary depending on the type and application of the inverter. For example, inverters used in photovoltaic systems may require additional tests, such as islanding protection and lightning protection tests.

The documents required for inverter certification in IEC 62109-1:2010 are:

1. Product Manual

2. Circuit Diagrams and Schematic Diagrams

3. Bill of Materials

4. Risk Assessment Report

5. EMC Test Report (if applicable)

6. Any Other Relevant Technical Documents

The inverter certification process in IEC 62109-1:2010 is as follows:

1. Select a Certification Body: The manufacturer needs to select an accredited certification body to conduct the certification.

2. Submit an Application: The manufacturer submits a certification application to the certification body and provides the necessary technical documents.

3. Factory Inspection: The certification body will inspect the manufacturer's factory to verify its quality management system and production process.

4. Product Testing: The certification body will test the product to verify its compliance with the requirements of IEC 62109-1:2010.

5. Certification Decision: If the product passes the test, the certification body will issue a certification certificate to the manufacturer.

Suggestions:

Manufacturers should start the certification process as early as possible to allow sufficient time for testing and resolving any potential issues.

Manufacturers should cooperate closely with the certification body to ensure that all necessary information and support are provided.

Manufacturers should maintain the continuous compliance of their products and quality management systems to retain the certification.

The following certifications are required for inverters exported abroad under IEC 62109-1:2010:

1. Europe: CE Marking (based on IEC 62109-1:2010)

2. United States: UL1741

3. Canada: CSA C22.2 No. 107.1

4. Australia: AS/NZS 4777.2

5. Japan: JIS C8343-1

Suggestions:

Exporters should consult the importers in the target country/region or the local certification bodies to determine the specific certifications required.

Inverters that have passed the relevant certifications can be labeled with the corresponding marks, indicating that the products meet the safety requirements of that country/region. This will help with smooth customs clearance and avoid product delays or refusals of entry.

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