IEC Standard Damp Heat and Freeze Testing Equipment
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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.
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 |
Features
High-precision temperature and humidity control system meeting stringent photovoltaic testing requirements
Supports both thermal cycling and damp heat freeze test modes, covering all relevant IEC 61215 clauses
Independent closed-loop control of temperature and humidity ensures fast response and stable operation
Large chamber volume enables simultaneous testing of multiple large-size photovoltaic modules
Touchscreen programmable control supports multi-step program editing and cyclic operation
Real-time display of setpoint and actual curves ensures intuitive monitoring and data traceability
Power failure memory and automatic recovery functions maintain test continuity
Environmentally friendly refrigeration system with reliable operation and low maintenance cost
Accessories
(1)Programmable control system with touchscreen interface
(2)High-precision industrial-grade temperature and humidity sensors
(3)Refrigeration compressor unit using environmentally friendly refrigerant
(4)Photovoltaic module sample racks compatible with multiple module sizes
(5)Drainage and condensation management system
(6)Optional data acquisition and management software for PC connection and data export
(7)Optional remote monitoring module for operation status viewing
(8)Consumable sealing strips for periodic replacement
(9)Humidity water filtration components to ensure humidification water quality
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