A solar panel sits on a roof for 25 years, and a car dashboard bakes in a closed car for 15. Both face heat and wet air every single day. Will
they still work after 1000 hours of damp heat? One test can answer that before the product ships.
One German electronics company shared its experience with LIB Industry after using the chamber: "Everything is fine, thank you. The chamber has been working well and we have not experienced any issues with it."- Dipl.-Ing. Soltane, Germany. The customer also appreciated LIB Industry's maintenance reminder and manual, confirming that the chamber continues to support their testing needs.
This article explains what an 85°C 85%RH Constant Humidity Chamberdoes, how LIB Industry supports automotive and PV customers, how BYD tests panels with it, and how to choose between it and a walk-in model.
What the Equipment Is Used For
What the Equipment Is Used For
An 85°C 85%RH Constant Humidity Chamber holds a stable 85°C and 85% relative humidity for hundreds or thousands of hours.
Moisture is forced into materials, seals, solder joints and coatings. Weak products show corrosion, delamination, insulation loss or power drop within weeks instead of years. PV makers use it for damp heat tests. Auto suppliers use it for sensors, control units, lamps and connectors. Electronics labs use it for the THB test under JESD22 A101.
LIB Industry as a Reliable Supplier
LIB Industry builds this equipment with PT100 Class A sensors, ±0.5°C temperature stability and ±2.5% RH humidity consistency. Temperature variation inside the workspace stays under ±1.5°C. The interior is SUS304 stainless steel with 100 mm polyurethane insulation. The controller stores 120 programs of 100 steps each. Noise stays under 65 dB(A). The equipment ships fully assembled and runs in under two hours. LIB Industry has delivered [number] units to [number] countries and works with [partner names], including BYD. Every unit carries a 3 year warranty and lifetime service.
Standards the Equipment Meets
| Standard | Applicable To |
|---|---|
| IEC 61215 MQT 13 | PV module damp heat, 85°C, 85%RH, 1000 h |
| IEC 61730 | PV module safety qualification |
| GB/T 9535 | Crystalline silicon PV module design qualification |
| IEC 60068-2-78 | Steady state damp heat for components |
| IEC 60068-2-30 | Cyclic damp heat for automotive parts |
| ISO 16750-4 | Climatic loads on automotive electrical equipment |
| JESD22 A101 | Temperature humidity bias test for chips |
BYD Praises LIB Industry's Full Test Solution for PV Panels
BYD bought the LIB Industry 85°C 85%RH Constant Humidity Chamber for PV panels. They praised its temperature and humidity stability
and the complete solution that adds UV preconditioning. Their tests follow IEC 61215 and IEC 61730.
Here is the damp heat method under IEC 61215 MQT 13:
① Measure initial power, insulation resistance and wet leakage current, and inspect the panel.
② Mount the panel and connect the temperature probe.
③ Ramp to 85°C ±2°C and 85% RH ±5%.
④ Hold for 1000 hours.
⑤ Cool to room temperature and recover for 2 to 4 hours.
⑥ Repeat the electrical and visual checks. Maximum power loss must not exceed 5%.
The UV preconditioning step is MQT 10. It applies 15 kWh/m² of UV in the 280 to 400 nm band, with at least 5 kWh/m² in the 280 to 320
nm band. Panel temperature is held at 60°C ±5°C and irradiance stays at or below 250 W/m². After that, humidity freeze runs 10 cycles between 85°C at 85%RH and minus 40°C. Thermal cycling MQT 11 runs 200 cycles between minus 40°C and 85°C.
BYD gave these reasons for the choice:
Safety: over temperature, low water, door open and power failure protection, plus CE and IEC compliance.
Accuracy: uniform airflow from multi direction centrifugal fans removes hot and wet spots.
Free customization: racks, cable holes, rails and fixtures made to your sample.
Long service: 3 year warranty, lifetime support, patient and skilled technicians, and free on site training.
Durable materials: SUS304 interior resists corrosion, and the powder coated A3 steel exterior resists impact.
Good value: water recycling cuts water use by up to 70%, and energy smart design lowers power bills by 20% to 30%.
Popular thermal humidity test chambers
85°C 85%RH Constant Humidity Chamber vs Walk-in Constant Humidity Chamber
|
|
|
|
|---|---|---|
 |
|
|
| Item | 85°C 85%RH Constant Humidity Chamber | Walk-in Constant Humidity Chamber |
| Sample size | Small parts and mini modules | Full size PV panels and large assemblies |
| Typical standards | IEC 61215 MQT 13, IEC 60068-2-78, JESD22 A101 | IEC 61215, IEC 61730, ISO 16750-4 |
| UV irradiance | Preconditioning done on separate UV equipment | Up to 250 W/m², 15 kWh/m² total dose |
| Simulated sunlight | Not applicable | 1000 W/m² at AM1.5 for STC checks under IEC 60904-3 |
| Floor space | Small, fits a normal lab | Needs a dedicated room |
| Cost | Lower | Higher |
Choose the standard model for parts, coupons and small modules. Choose the walk-in model when you must test full size panels or load many samples at once. Tell LIB Industry your sample size, standard and test hours, and the team will recommend the right size.
FAQs on the 85°C 85%RH Constant Humidity Chamber
Q1: What is the temperature and humidity range?
Damp heat tests run at 85°C and 85%RH. The wider range covers minus 40°C to 85°C.
Q2: How fast does it heat and cool?
It heats at 3°C per minute and cools at 1°C per minute.
Q3: How long does installation take?
Under two hours, with no special tools.
Q4: Can I customize the racks and holes?
Yes. Size, shape, load and quantity are free to customize.
Q5: What is the warranty?
3 years, plus lifetime technical service.
Q6: Do you offer training?
Yes. Free on site training is available, and online training is also offered.
Q8: How is the equipment shipped?
It ships in a strong wooden crate by sea, air or land. Lead time is [number] days, and LIB Industry arranges FOB or CIF terms.
Q9: What if the equipment is damaged in transit?
It is fully insured, and LIB Industry replaces damaged parts quickly.
Need Help Choosing an 85°C 85%RH Constant Humidity Chamber?
Looking for an 85°C 85%RH Constant Humidity Chamber for damp heat, PV module, automotive, or electronic component testing? LIB Industry provides controlled temperature and humidity testing solutions for PV panels, automotive electronics, sensors, connectors,
batteries, and other components. Options include Benchtop Thermal Humidity Test Chambers, Reach-In Thermal Humidity Test Chambers, andDrive In Thermal Humidity Test Chambers for different sample sizes and testing capacities.
The right chamber depends on your test standard, sample dimensions, test duration, loading capacity, and laboratory space. Share your testing requirements with LIB Industry, and our technical team can help you select or customize a suitable humidity testing solution.
References
LIB Industry Technical Team - Technical information, damp heat testing methods, product specifications, and application guidance.
