During the environmental test of solar cells, the wet freezing, Temperature cycling, damp heat, high and low temperature damp heat aging and other tests mentioned in the specification must be carried out. Confirm whether the solar cell has malfunctioned or failed during the testing process. The failure of solar cells can be judged through Open-circuit test.

1、 Test types: general inspection, click hazard, fire hazard, mechanical stress and environmental stress

2、 Processing tests: thermal cycling, wet freezing test, wet heat test, UV test

3、 Test equipment: constant temperature and humidity test chamber, constant temperature and humidity test machine, cold and hot shock test chamber, high and low temperature test chamber

4、 Test conditions:

（1）. Test conditions: 85 ℃/85 ± 5% (20h) ←→ -40 ℃ (0.5-4h), cycle: 10 cycles;

（2）. -40 ± 2 ℃ ←→ 85 ± 2 ℃, cycles: 50, 200 cycles

5、 Temperature cycling test:

（1）. Test purpose: To confirm the thermal non-uniformity and fatigue resistance of solar cell modules to repeated temperature changes.

（2）. Control method of constant temperature and humidity experimental box:

Material setting for microcomputer constant temperature and humidity test chamber: In the form of a touch controlled dialog box, the operation is simple and clear, and a built-in directory data processing system is built in.

Curve making: When the temperature, humidity, and time material settings are completed, they can be immediately converted into set curves, and practical work curve making can also be obtained during work.

Time signal: 3 sets of temporal control output interfaces, equipped with 10 different forms of temporal control, facilitating the timing planning of external drive components start/stop.

Final temperature: At the end of the test, you can choose to return to a normal temperature to facilitate the removal of the test item.

Safety detection: A fully functional system with 15 functions ensures the safety of container operations, and can proactively identify problem moments, projects, and cleaning strategies.

Abnormal tracing: It can display historical materials before recording the problem, such as the factors causing the problem and the calculation records of the time of the attack.

External maintenance of this product: an electronic overtemperature maintenance device independent of the main controller, which can set the temperature upper limit maintenance for the tested target.

6、 How to solve the problem of the controller of the constant temperature and humidity test box not displaying?

（1）. The controller of the constant temperature and humidity test box does not display. We need to consider whether the motherboard is damaged and use a universal meter to test if there is current passing through;

（2）. Check if the electrical components connected to the controller are damaged, such as relays;

（3）. The above two checks are correct in order to determine that the controller is faulty, so it is necessary to find a professional manufacturer to provide a quotation for controller maintenance.