Thermal Cycling Damp Heat and Freeze Test Chamber

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Thermal Cycling Damp Heat and Freeze Test Chamber is an environmental reliability testing system designed to evaluate photovoltaic modules under extreme temperature variation and high-humidity freezing conditions. By repeatedly cycling between high temperature, low temperature, and damp heat environments, the chamber simulates day–night temperature differences, seasonal transitions, and freeze–thaw stresses encountered during long-term outdoor operation. The system is used to verify structural integrity, electrical performance stability, and encapsulation durability of photovoltaic modules, serving as a critical test platform for design validation, type testing, and quality control.

Application

This chamber is widely used in photovoltaic and related renewable energy fields, including but not limited to:

Thermal cycling and damp heat freeze reliability testing of crystalline silicon photovoltaic modules (monocrystalline and polycrystalline)

Environmental durability evaluation of thin-film photovoltaic modules such as CdTe, CIGS, and amorphous silicon

Temperature and humidity resistance verification of photovoltaic encapsulation materials including EVA, backsheets, glass, and encapsulants

Design verification (DV) and type testing (TT) during photovoltaic module development

Factory inspection and consistency quality control of photovoltaic modules

Standardized photovoltaic module testing in third-party inspection and certification laboratories

Environmental reliability research of new energy materials and devices in universities and research institutes

Standards

(1)GB/T 9535 Crystalline Silicon Terrestrial Photovoltaic (PV) Modules – Design Qualification and Type Approval

(2)GB/T 18911 Photovoltaic Modules – Environmental Test Methods

(3)GB/T 2423.1 Environmental Testing for Electric and Electronic Products – Part 2: Test Methods – Test A: Cold

(4)GB/T 2423.2 Environmental Testing for Electric and Electronic Products – Part 2: Test Methods – Test B: Dry Heat

(5)GB/T 2423.3 Environmental Testing for Electric and Electronic Products – Part 2: Test Methods – Test Ca: Damp Heat, Steady State

(6)IEC 61215 Terrestrial Photovoltaic (PV) Modules – Design Qualification and Type Approval

(7)IEC 61730 Photovoltaic (PV) Module Safety Qualification

(8)IEC 60068-2-1 / IEC 60068-2-2 / IEC 60068-2-30 Environmental Testing – Cold, Dry Heat, Damp Heat

(9)UL 1703 Standard for Flat-Plate Photovoltaic Modules and Panels

(10)JIS C 8918 Environmental Test Methods for Photovoltaic Modules (partially applicable)

Parameters

Item	Technical Specification
Temperature range	-40 ℃ to 85 ℃
Temperature fluctuation	≤ ±1 ℃
Temperature deviation	≤ ±1 ℃
Temperature uniformity	≤ ±2 ℃
Heating and cooling rate	Compliant with IEC 61215 requirements
Humidity range	30 %RH to 98 %RH
Relative humidity deviation	±3 %FS; 85 ±2 %RH; 90 ±2 %RH
Humidity fluctuation	±2 %RH
Humidity uniformity	≤ 2 %RH
Temperature change rate	≤ 100 ℃/h
Extreme temperature dwell time	≥ 10 min
Test cycle count	200 cycles or 50 cycles
Maximum sample capacity	12 photovoltaic modules
Inner chamber dimensions	Approx. 1.5 × 2.5 × 1.5 m (L × W × H)
Outer chamber dimensions	Approx. 2.5 × 3.0 × 2.5 m (L × W × H)
Power supply	AC 380 V / 60 Hz

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