UV Fluorescence

UVF Kit

Quickly see cell cracks in fielded modules at night

Looking for a diagnostic tool to see cracks and other
defects in aged panels?

BrightSpot’s UV Fluorescence Kit is a tool every O&M technician should have.

Quickly see defects

UVF imaging is the only module testing technique which directly examines a panel’s polymer components and can reveal cell cracks, hot spots and encapsulant yellowing, gridline corrosion/delamination, Bill of Material differences in backsheets, encapsulants and metallization pastes, and sealing problems at panel edges and J-boxes

“

The UV Fluorescence Kit is easy and intuitive to use and lets our trainees take a quick look at modules for damage. It is very useful for both troubleshooting panels and as a diagnostic tool in the PV O&M classes we teach.

– Joseph Inman, Lab Manager

Components

UV Flashlight with
a filter to exclude light

Compact travel case

Batteries & Protection Glases

The UV Fluorescence kit can scan small accessible systems or be used to demonstrate the potential for higher throughput UVF imaging tools on larger systems.

UVF Kit Includes

UV Flashlight with a filter to exclude light
The visible spectrum
Protective pouch for flashlight
Four rechargeable batteries
Dual battery charger
Two UV protection goggles
Foam-lined carrying case
BrightSpot expertise & support

UVF can reveal a wide range of panel problems and non-uniformities

The UV Fluorescence technique works with panels that have polymer backsheets. Fluorophores are contained in panel encapsulants and backsheets – leading to fluorescence in the visible spectrum when exposed to UV light.

Encapsulant BOM Variations

Backsheet BOM Variations

Gridline
Corrosion

Edge Seal Failure

Non-uniform Lamination

Cell Cracking
Dating

Hotspots and Yellowing

J-Box Seal Failure

Download Product Brochure

Download the product brochure to get all the info and specs

Publications

Here you’ll find white papers, case studies, and expert commentary designed to provide practical takeaways for professionals and decision-makers

Non-contact Photoluminescence Imaging for Quality Control of Satellite Solar Panels

Customized Defect Imaging Solutions for Perovskite and Tandem Cell/Panel Architectures

UV Fluorescence Imaging Of Defects And Bill Of Materials Variations In Bifacial Solar Panels

EUPVSEC – Bilbao, Spain – Sep 22, 2025

Ultraviolet Fluorescence Imaging for Photovoltaic Module Metrology: Best Practices and Survey of Features Observed in Fielded Modules

IEEE Journal of Photovoltaics ( Volume: 15, Issue: 3, May 2025)

Low-Cost Daytime Electroluminescence Imaging

NREL PV Reliability Workshop – Lakewood, CO USA – Mar 6, 2025

UV Fluorescence Imaging for Solar Panel Product Development and Durability Testing

NREL PV Reliability Workshop – Lakewood, CO USA – Feb 28, 2024

Unveiling the Unseen: Harnessing UV Fluorescence for Comprehensive Rooftop PV System Assessment and Successful Insurance Claims Process