Five-busbar industrial c-Si wafer cell undergoing Kelvin probe measurement of short circuit current.

NREL's photovoltaic (PV) device performance services include high-precision performance testing, certification, and calibration of PV cells and modules, governed by rigorous global standards and decades of experience and expertise.

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Nondestructive and Fast Spectral Response Measurements for PV Modules

This LED-based pulse quantum efficiency (QE) system enables NREL to measure the spectral response of PV modules quickly and reliably, without the need to individually tab cells. And it offers a custom map of spectral response at different locations. To learn more, read our blog.

A solar module sits underneath a square shade that covers several cells around the measured cell. A bundle of black fibers runs from LEDs to the center of this shade to measure the desired cell.

Capabilities and Accreditations

Expertise, precision, and fast turnaround times from a globally recognized PV testing team


Testing and certification for cell and module measurements and primary reference cell calibrations

PV Calibrations Blog

Check out the latest updates from the PV Cell and Device Performance Group! Questions and feedback are always welcome

Efficiency Charts

We have a long history of accurately measuring and tracking the efficiencies and performance of photovoltaic devices.

Technology-Specific Cell Efficiency Charts

Crystalline silicon cells

Single-junction gallium arsenide cells

Multijunction cells

Thin films

Emerging PV.


Nikos Kopidakis

Principal Investigator, Cell and Module Performance Measurement