High-accuracy
measurement
for the world’s photovoltaics.
Long-pulse, full-LED solar simulators and electroluminescence systems certified for class A+A+A+, deployed in 40+ countries, trusted by the labs that calibrate the rest.
We’ll be there
Catch us at the major PV shows. Book a slot for a demo or just a coffee.
Measuring technology you can trust.
For three decades, first as Pasan, now together with Avalon ST, we've been the metrology partner of the photovoltaic industry. Leading certification bodies rely on our systems to set the standard.
High accuracy
Class A+++ traceability with sub-0.5% uniformity, suited for high-capacitance HJT and TOPCon cells.
Full LED. No consumables.
37-wavelength LED arrays replace xenon lamps, no lamp ageing, no spectral drift, lower TCO.
Uniformity robot
Automated robotic scan of the full active area calibrates spatial non-uniformity at every cell position, TÜV-verified, no manual passes, repeatable in minutes.
Customisation
From 600×600 mm research benches to 4000×4000 mm Pro Max systems, every Nexun is tailored to the modules it has to measure.
Nine systems. One physics-grade platform.
From production-line throughput to research-grade uncertainty, every Nexun shares the same long-pulse LED engine, the same calibration chain, and the same Avalon software.
Nexun Mobile Lab
Self-contained van, trailer or container lab. Flash testing and 150 Mpx EL imaging in the field.
- 60 panels/h throughput
- 150 Mpx EL imaging
- Van, trailer or container configurations
Nexun PRO MAX
The next-generation laboratory simulator. 1300 W/m² peak, 0.2% LTI, class A++ A+ A++ per IEC 60904-9.
- 500 ms pulse · 22 wavelengths · <1% uniformity
- Up to 1.8 × 3 m active area
- Perovskite + thin-film (CIGS) ready with precon add-on
Nexun ULTRA
37 wavelengths, sub-0.5% uniformity. The reference instrument.
Specs
Nexun PRO
1100 W/m², 35% spectral deviation. Cost-effective workhorse for HJT lines.
Specs
Nexun EVO
High-throughput production line flash testing. 100 ms pulse.
Specs
Perovskite
500 ms pulse + integrated steady-state preconditioning.
Specs
Cosmo · AM0
300–1900 nm for triple/quadruple junction.
Specs
MiniLab
600×600 mm bench platform for cell-level R&D.
Specs
Nexun Steady
Full-LED steady-state simulator. Reduced 300–1000 nm spectrum or full 300–1200 nm, low footprint, large active area, ideal for long-soak measurements and perovskite preconditioning.
SpecsFind your simulator.
Pick the technology, throughput and active area that match your line or lab. We'll point you at the right Nexun and get you a quote within two business days.
Tell us what you measure.
PROA++ A+ A++
Mid-range and cost-effective for labs and production
Trusted where measurement is the product.
Avalon and Pasan systems are installed in the world's leading PV laboratories, certification bodies and gigafactories, wherever a tenth of a percent decides a contract.
Setting the standard.
From product launches to fundamental measurement research, what we're working on.
Meet us at SNEC, Intersolar Europe and EU PVSEC 2026
Three PV shows, one busy season. The Nexun Mobile Lab is going on tour, and we'll be talking long-pulse LED, xenon-grade calibration and what's next for the Nexun line.
Read article
Avalon ST acquires PASAN SA, uniting two leaders in PV metrology
The acquisition combines Avalon's LED leadership with Pasan's xenon heritage. Two product lines, one group, headquartered in Neuchâtel.
Read article
LED solar simulator en route to UNSW Sydney
A Nexun PRO ships to the University of New South Wales for next-generation cell research. Australia's leading PV institute joins the LED-class adopters.
Read articleLet's measure something precisely.
Tell us about your panels, throughput targets and lab footprint. An Avalon application engineer, based in Switzerland or your region, will scope a system in two business days.
- Application-engineering call within 48 h
- Full quote with delivery and integration timeline
- Reference visits to operating Nexun installations
- Trade-in path for legacy xenon simulators