The Push Test is a procedure designed to assess the ability of a solar module, particularly the solar module glass, to withstand pressure from sharp objects like stones and metal.
Why is a push test necessary?
This test is essential to ensuring the durability of the solar module and its glass, which serves as a protective layer, preventing dirt, water, vapours, and other environmental factors from damaging the PV cells—the core of the solar module.
By conducting the push test, we can determine if the solar panel glass can endure damage from sharp objects, which is more likely to occur during the handling and installation processes.
How is Push Test conducted?
The push test involves applying a point load of 9kg to any point on the module for 1 minute. The specific load amount and test duration are determined by the IEC.
Pass criteria for the push test
To pass the push test, three main criteria must be met:
· No evidence of mechanical damage
· Maximum output power degradation ≤ 5% (of the value measured before the test)
· Insulation resistance should meet the same requirements as the initial measurement