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.