Damp Heat Testing

We all know that one of the major issues faced during PV or tropical solar installation is the combination of humidity and heat. But things can work with the help of Damp Heat testing!

Wait, are you not aware of what Damp Heat Testing is all about? Or, you want to know how the Damp heat test procedure takes place? In any case, read the blog completely.

What Is a Damp Heat Test?

Damp Heat Testing

To begin with the basic understanding, the Damp Heat test assesses the effect of heat and humidity on the reliability of PV modules. The test takes place to check moisture intrusion, delamination, and corrosion.

To put it in other words, since PVC cells are laminated with both glass and back sheet, a well-executed Damp Heat can detect poor back sheet and frame insulation caused by water ingress, which causes power degradation. PV modules with high DH performance are required for projects in hot, humid environments.

Why Is Damp Heat Testing Significant?

The Damp Heat Test is used to evaluate the suitability of elements, equipment, or other products for use, shipping, and storage under humid conditions and cyclic temperature changes.

The test replicates long-term degradation and failure modes that are common in high-temperature, high-humidity environments. Moisture and heat can deteriorate the materials that hold the PV module together. Moisture can enter the laminate and corrode internal materials when the adhesiveness of these materials weakens due to low-quality components and/or substandard lamination processes. As a result, performance suffers, and safety concerns arise.

But with this testing, you get an assurance that nothing will mess up in the overall procedure! Now that you know why this testing holds great value, let’s read about some basic standards to keep in mind while performing this Damp Heat Test.

What are the standards for Damp Heat Test?

The Damp heat test includes many Damp heat test standards, and the application range of each standard varies greatly. For example, Constant damp heat is widely used to assess the suitability of products for use, storage, and shipping in high-humidity environments.

Similarly, Cyclic damp heat is used to assess the suitability of products for use, shipping, and storage under strong humidity conditions combined with cyclic temperature changes, resulting in condensation on the specimen’s surface.

Then the Composite temperature cyclic test is mainly intended for component-type specimens to ascertain the opposition of specimens to the deteriorative impacts of high temperature/humidity and cold conditions in an enhanced manner.

The test standards often used are:

  • GB/T 2423.3
  • GB/T 2423.4
  • GB/T 2423.34
  • IEC 60068-2-38
  • IEC 60068-2-78
  • IEC 60068-2-30

How Does a Damp Heat Test Take Place?

Now that you are familiar with a damp heat test and its standards let us now have a look at how a damp heat test takes place. The damp heat test is carried out by applying 85°C + 2°C with a relative humidity of 85% for a continuous cycle of 1,000 hours or more than 1 month.

You need to keep in mind that one thousand hours of wet heat testing at 85 °C and 85% relative humidity is equivalent to many years of exposure to the elements. And the testing panel is put into a damp, hot test chamber where it is subjected to these circumstances.

What Are Some Challenges That Take Place During The Test?

Just like every other testing procedure, the damp heat testing process also faces some problems or challenges during the test. So, let us have a look at what are some of the main challenges for it.

The PV module’s lamination technique and its border sealing against humidity are particularly put to the assessment in this test. Determining factors include the peel power of PV modules laminated using the conventional lamination procedure.

This test can identify problems with the solar module’s border sealing and lamination procedure. Humidity infiltration can be seen as the delamination and rusting of various cell components.

Numerous flaws, including delamination, degradation of the glass surface (AR coating), frame oxidation, metal grid discoloration, and junction box installation and connection problems, can be found by damp heat testing.

Why Choose Our Lab For Damp Heat Testing?

Overall, Damp Heat testing is a type of intensified environmental longevity test that determines a solar module’s potential to withstand long-term exposure to high temperatures and humidity penetration.

Therefore, it is an important part of quality control that is usually performed during product development to ensure product safety and quality. And to get this testing done keeping in mind the relevant industry standards, it’s crucial to look for the best testing labs in India.

So, if you’re someone who wants to get this damp heat testing done for your products, we are the right solution in front of you.

We at Pride Testing Services have built a world-class testing facility to ensure the quality and dependability of various mechanical, electronic, and electromechanical products.

Additionally, we provide a variety of thermal cycling test services such as humidity testing, damp heat testing, tropical exposure testing, dew testing, and moisture resistance testing in accordance with industry standards.

Visit our website to check out our Damp testing services in India!




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