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solar module testing with testing machine from Hegewald and Peschke
Universal testing machine inspekt solo 2.5 kN for solar module testing

Determination of the mechanical properties of solar panels

Universal testing machine inspekt solo 2.5 kN

Test system and equipment

The inspekt solo 2.5 kN tensile testing machine, in combination with a special testing device, enables the mechanical testing of solar modules as part of quality control. The system is particularly suitable for thin-film solar modules made of laminated glass without a frame. It can be used, for example, to carry out tests in accordance with DIN EN ISO 527-3 (determination of the tensile properties of films and sheets).

Components of the solar modules:

  • Backrails: Mechanical fixation on the rear side
  • Junction box: With cables & connectors for current output

Test method & objective

Two central mechanical tests are carried out:

Pulling off the junction box (tensile test) 

Objective: Checking the durability of the adhesive connection between the junction box & solar panel under installation loads

  • The solar module is removed from ongoing production and transported to the test site on a mobile roller table.
  • The module is pushed onto the grooved plate of the test table and fixed in place using clamping elements.
  • The associated junction box cable is clamped in the vice grip.
  • The automatic test sequence starts and ends when the junction box is completely removed.
  • Result: Determination of the maximum tensile force (Fmax) required to release the connection.

Adhesive test on the backrail (tensile test)

Objective: Testing the adhesive surfaces & connecting parts of the backrails under environmental influences (e.g. wind)

  • Adhesive strips are applied to the backrails by a robot.
  • The sample pieces are added manually and then placed on the grooved plate of the test table.
  • The backrails are fixed in place with clamps.
  • The movable tensile fixture pulls the specimens until the specimen detaches from the adhesive.
  • Result: Analysis of the adhesive strength and mechanical properties of the bonded joint under simulated environmental conditions.

With this high-precision test method, assembly and environmental loads can be realistically simulated to ensure the quality and durability of solar modules.

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