PV wet freezing test chamber wet freezing test process

The photovoltaic wet test chamber, as outlined in the IEC 61215 standard, includes specific requirements for the wet freeze test. This test is designed to evaluate a solar module's ability to withstand extreme environmental conditions, including high temperature, humidity, and subzero temperatures. Here’s a detailed breakdown of the process: **Purpose:** The primary goal of the wet freeze test is to assess the durability and reliability of photovoltaic modules under harsh environmental conditions. It ensures that the components can function properly after exposure to alternating cycles of high humidity and low temperatures. **Procedure:** 1. Place the solar modules on the test bench at room temperature. 2. Connect the temperature sensor to the module and link it to the monitoring equipment. 3. Perform 10 complete cycles, where each cycle involves: - Temperature range: -40°C (±2°C) to +85°C (±2°C) - Relative humidity: 85% ± 5% - Each cycle is followed by a recovery period of 2 to 4 hours. **Post-Test Measurements:** After completing the test, the following evaluations are conducted: - Insulation resistance test to ensure electrical safety. - Visual inspection to check for any physical damage or defects. - IV curve testing to measure the electrical performance of the module. **Requirements:** - No major defects should be observed after the test. - The maximum power output must not decrease by more than 5% compared to the initial measurement. - The insulation resistance must meet the same standards as the initial test. This rigorous procedure helps manufacturers ensure the long-term performance and reliability of their solar panels under real-world conditions.

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