New Testing Standard for Electronics Components and Micro-Inverters

A new comprehensive standard covering test requirements for electronic components and micro-inverters on photovoltaic modules has been released by TÜV Rheinland.

The application scope of the new 2 PfG 2305 standard applies to devices with a system voltage of up to 1,500 V DC, including connector sockets with integrated electronics for the monitoring or power management of solar modules.

“With these new test requirements, we go further than the existing standards for connector sockets and electronic components alike. This is because micro-inverters and monitoring elements are exposed to much harsher environmental loads when they are installed in the module,” Ralf-Martin Müller, head of the solar energy division at TÜV Rheinland, said.

According to the company, the new test requirements now take into account all applicable requirements for photovoltaic connector sockets arising from EN 50548 and combine them with requirements from IEC 62109 and other additional loads to which the electronics are exposed.

For example, says the company, the test requirements cover component tests in the climate chamber during temperature change tests from -40°C to +85°C that last 1,000 hours. Further mechanical load tests, insulation tests and tests with UV radiation are performed in the laboratory in order to monitor risks associated with overheating, corrosion or electric shock. The components must also satisfy the requirements of protection rating IP 55 so that they are protected against dirt, dust and moisture.

The new test standard also applies to inverters in accordance with the IEC 62109 series, components like the Maximum Power Point Tracker and equipment for monitoring in accordance with IEC 61010 with the applicable safety standards for measuring equipment.


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