Key takeaways:
halm introduces LED-based sun simulation while continuing to offer xenon-based systems for IV testing
Both platforms support advanced measurement modes, including multi-level IV and SunsVoc, with high accuracy and repeatability
The systems operate with similar throughput and cycle time, while the LED variant enables additional characterization capabilities
halm elektronik, one of the leading IV tester suppliers from Germany, responded to the TaiyangNews survey on Solar Module Production Equipment 2026 with 2 sun simulator models. The newer cetisPV-IUCT-QD, introduced in 2025, is particularly noteworthy, featuring an LED-based light source, marking halm’s entry into LED-based sun simulation. While halm has traditionally been a strong proponent of xenon lamp- based systems, this product reflects a broadening of its technology portfolio. The second model, cetisPV-IUCT-Q2, launched in 2024, represents the company’s xenon-based platform, highlighting the continued relevance of this light-source technology within halm’s product lineup.
Both products are designed for pulsed illumination, and the LED-based product also supports steady-state characterization. Interestingly, neither supports bifacial module characterization. Despite being the latest, IUCT-Q2’s maximum illumination area of 2,700 × 1,400 mm is smaller compared to IUCT-QD’s 2,800 × 1,600 mm. These simulators use active 3-quadrant loads. The illumination intensity ranges from 200 to 1,300 W/m² for the LED-based product, while the xenon variant has a slightly wider range, starting from 100 W/m². Both models are rated A+A+A+ under IEC 60904-9.
Both cetisPV-IUCT-Q2 and cetisPV-IUCT-QD have an integrated wavelength control feature. The tools support IV measurements in both light and dark conditions, under forward and reverse bias, and at low and high current. They support SunsVoc, advanced hysteresis in 1 or 2 flashes, and multi- level IV measurements. IUCT-QD can also perform additional characterizations, such as EL, PL, spectral response, and external quantum efficiency. As an option, both models can be equipped with an automatic transportation system for module loading and unloading.
During the operation, both models use a single-level flash profile for standard IV measurements, double- or triple-level flashes for series-resistance evaluation, and a ramp or progressive flashing method for SunsVoc.
The measurement cycle time for both models is 14.5 seconds per panel with a measurement resolution of 16 bits. Measurement tolerances for current and voltage are less than a 0.05% deviation, and repeatability for power measurement has a deviation of less than 0.1%. Both models have a maximum throughput of 240 modules/h and a total system uptime of over 99%.
The text is an edited excerpt from TaiyangNews’ Market Survey on Solar Module Production Equipment 2026, which can be downloaded for free here.