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Updated: Mar 3

EMC compliance

Power conversion equipment (PCE) is indispensable for photovoltaic power energy systems to convert the DC electric power generated by solar photovoltaic panels (PV) into AC electric power to feed the network load.

As the solar PV market and the electric power converters continue to increase worldwide with commercial, industrial, and residential installations, this system must comply with the safety and EMC relevant rules and standards before being marketed.

EMC in photovoltaic power conversion equipment

Like any other electrical equipment, PV systems must function correctly in their electromagnetic environment and not be affected by external interference emissions.

Almost all electronic equipment used in photovoltaic systems is digital. However, the most concerning component in photovoltaic systems is the inverter equipment. In the inverter circuit, square waves are a composite of a sine wave plus all peculiar harmonics of the original sine wave. These harmonics cause undesirable interference that could introduce in the photovoltaic system power or other electronic systems.

A specific standard exists regarding limiting emissions and immunity disturbances (150 kHz to 30 MHz).

IEC/EN 62920 EMC Standard

This Standard specifies EMC requirements for DC to AC power conversion equipment used in photovoltaic power systems.

List of EMC tests for compliance

IEC61000-4-2 ESD

IEC61000-4-3 Radiated disturbances

IEC61000-4-4 Electrical fast transient/burst

IEC61000-4-5 Surge

IEC61000-4-6 Conducted disturbance

IEC61000-4-11 Voltage dips and interruption

IEC61000-3-2 Harmonics

IEC61000-3-3 Voltage fluctuations and flicker

Do you need assistance with Safety or EMC compliance, contact ExpertEMC at

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