A pure-LED steady-state simulator. Reduced 300–1000 nm spectrum for perovskite work, or full 300–1200 nm for silicon. No hybrid, no halogen, no consumables. Stability better than 0.5% over one hour, with an optional thermal-chamber companion sized for the heat load of continuous illumination.
Other steady-state simulators reach for a tungsten-halogen or xenon arc bolt-on the moment the spectrum gets demanding. That is where the consumables come from, the spectral drift, the lamp-replacement downtimes, the maintenance schedule. Nexun Steady is 100% LED. Every photon is generated by a solid-state engine that is rated for the lifetime of the simulator, so the spectrum does not drift between shifts and the only maintenance is the auto-cal cycle.
Steady is configurable to the spectral range your devices actually respond to. Pick the perovskite-optimised 300–1000 nm spectrum, or extend to the full 300–1200 nm silicon range. The IR you don't need is the IR you don't pay for, in capex or in cell heat.
Perovskites are insensitive beyond 1000 nm. Generating IR you cannot use is electricity wasted as heat directly into the device under test, which makes the measurement harder and the cell hotter for no reason. The 300–1000 nm reduced spectrum drops the IR you don't need, lowers the heat load on the cell, and keeps the build cost of the simulator down.
Specify the 1200 nm extension and Steady covers the full crystalline-silicon response, including the deep-red and near-IR contribution that determines accurate Isc on c-Si. Same engine, same software, same stability budget, just the wavelengths added back in.
Some measurements need a flash. Steady is for everything else, the standards and characterisations that demand continuous illumination, with the spectral and temporal stability to survive a long soak.
Bring perovskite devices to their stabilised operating point under realistic illumination before the IV measurement. Steady-state output, the right spectral coverage, no metastability artefacts in the result.
Hotspot, partial-shading, reverse-bias and similar IEC tests require a continuous light source, not a flash. Nexun Steady is built to sit under those tests for the durations the standard demands without drifting.
Sweep cell or module temperature under stable illumination, or characterise low-light response down to the irradiances that matter for real deployment. Stability < 0.5% over 1 hour means the data you collect over a long sweep is the data you intended to collect.
Validate inverter MPP-tracking algorithms against a known, repeatable, programmable steady-state input. Drive irradiance steps, holds, transients, then read what the tracker did against ground truth.
Continuous illumination heats the device under test. A standard temperature chamber cannot keep up with the energy that a steady-state simulator dumps into a module over a long soak, the temperature drifts, and the test data drifts with it. The Avalon thermal-chamber companion is sized specifically for the steady-state heat load: more cooling capacity, more headroom, the device stays on its setpoint through a full IEC hotspot or preconditioning cycle.
Higher-capacity HVAC, four-zone PID, panel uniformity better than ±1.7 °C. Anti-reflection substrate facing the simulator.
Steady-state delivers more total energy into the module than any pulsed test, so the chamber is sized for that load specifically, no thermal drift over a multi-hour soak.
Steady is the right answer when the test takes seconds to minutes to hours, not milliseconds; when standards demand continuous light; when perovskite needs preconditioning; when the question is not "what does this module do at one moment" but "what does this module do under realistic, sustained light".
Active-area variants, irradiance trim, the 1200 nm extension and the thermal-chamber companion are detailed in the full datasheet. Request access below.
Perovskite, silicon, hotspot, MPP, share what you need to measure and our application engineers will reply within a working day with a configuration.
