Solar Simulator Evaluator

Evaluate classification per IEC 60904-9 / ASTM E927, and calculate spectral mismatch correction factors.

Solar simulators used in photovoltaic testing are classified by spectral match, spatial non-uniformity (SNU), and temporal instability (TIE) per IEC 60904-9:2020 or ASTM E927-19, yielding grades from A+ to C in each category. This tool supports two workflows. In classification mode, it computes the spectral match ratio for each wavelength bin against the AM1.5G, AM1.5D, or AM0 reference spectrum and classifies SNU and TIE from measured irradiance arrays, producing the composite classification code. In mismatch correction mode, it calculates the spectral mismatch factor M from preset spectral responsivity curves for common PV technologies (Si, GaAs, CdTe, perovskite, organic) and corrects a measured short-circuit current I_sc to its reference-spectrum equivalent. Enter bin irradiance fractions as percentages and spatial or temporal irradiance measurements as comma-separated values.

Classification Inputs
Bin irradiance fractions (%)
400–1100 nm — 6 bins
400–500
500–600
600–700
700–800
800–900
900–1100
Spectral Match
Bin 1 (400–500 nm)
Class A+
0.9674
Bin 2 (500–600 nm)
Class A+
1.030
Bin 3 (600–700 nm)
Class A+
1.038
Bin 4 (700–800 nm)
Class A+
0.9060
Bin 5 (800–900 nm)
Class A
1.136
Bin 6 (900–1100 nm)
Class A+
0.9371
Overall Spectral Match
A
Spatial Non-Uniformity
SNU
Class A
1.898%
Temporal Instability
TIE
Class A
0.3000%
Overall Classification
Classification
AAA
Abridged Optics — Solar Simulator Evaluator v1.0Classification per IEC 60904-9:2020 and ASTM E927-19. Mismatch uses simplified preset spectral profiles.

All information, equations, and calculations have been compiled and verified to the best of our ability. For mission-critical applications, we recommend independent verification of all values. If you find an error, please let us know.