Recently, Sunpro successfully passed the rigorous tests conducted by the internationally recognized testing institution TÜV SÜD . This is more than just a certificate — it is strong proof of the long-term reliability of Sunpro modules under extreme conditions.
01 Thresher Test : Beyond Compliance, Far Exceeding Standards
Standard PV module certification is based on the basic framework of IEC 61215 (performance) and IEC 61730 (safety). The Thresher Test that Sunpro has now passed, however, increases the severity of all core test items to 2–3 times the standard requirements.
02 Data Speaks: Every Test is in “Extreme Mode”
| Test Item | Sunpro Test Standard | Standard IEC Requirement | Severity Multiple |
| Thermal Cycling (TC) | 600 cycles | 200 cycles | 3x |
| Damp Heat (DH) | 3,000 hours | 1,000 hours | 3x |
| UV Preconditioning (UV) | 45 kWh/m² | ~15 kWh/m² | 3x |
| PID Test | 288 hours | 96 hours | 3x |
| Sequential Aging (DML+TC+HF) | 3 complete cycles | 1 cycle | 3x |
| Safety Sequence A/B | 2–3 repetitions | 1 cycle | 2–3x |
03 What This Means: Usable, and Durable
Modules that pass the Thresher Test demonstrate:
◾ Longer service life — Remaining stable and reliable in extreme climates such as deserts, extreme cold, high altitudes, strong UV, and coastal humidity, with a service life of over 30 years
◾ Lower degradation rate — Excellent resistance to aging and PID ensures greater power generation revenue throughout the lifecycle
◾ Higher safety margin — Electrical safety, mechanical load, fire resistance, and other properties have been validated at multiples of standard levels
04 Sunpro’s Commitment: Delivering Quality Through Hardcore Testing
Reliability is not claimed — it is proven through testing. Sunpro always develops its products to standards higher than industry requirements. Sunpro Passes TÜV Thresher Test confirms our industry-leading position in material selection, process control, and quality management systems. Whether your project is in a desert, on snowy plains, by the sea, or in an industrial area, Sunpro modules are trustworthy.
Proven quality through hardcore testing.
Protecting every kilowatt-hour of green energy with reliable products.