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DISCOVER WHAT THE EYE CANʻT SEE
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Product Information
LumiSolarOutdoor System
Electroluminescence (EL) Inspection of
Solar Modules directly on-site
The award-winning1) greateyes LumiSolarOutdoor system allows to investigate the
quality of solar modules directly on-site by utilising the electroluminescence (EL)
phenomenon. Defects will clearly show up and can therefore be identified quickly. As a
highlight of this innovative greateyes product, EL tests can be performed with the
modules still being mounted to their substructure.
In contrast to other systems the LumiSolarOutdoor system does not require a dark box
or enclosure. Measurements have to be made at twilight or overnight. It is the first
system which is capable of performing measurements in the open air. That saves cost
and time as the modules can stay in its place. Moreover damages due to assembly
work and/or transport are prevented.
left image: solar module mounted on a tracker
right image: EL image of the same solar module, still mounted
There are two versions of the system available. A battery-powered equipment allows to
measure single solar modules without the need of an external power source. If threephase electric power is accessible at the facility, a complete string of solar modules can
be measured in a stepwise procedure using the mains-operated version of the
LumiSolarOutdoor system.
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The LumiSolarOutdoor system has been awarded with the 3rd prize - Innovation Award 2012 at the
prestigious Bad Staffelstein Photovoltaics Symposium.
greateyes GmbH • LumiSolarOutdoor Information • copyright © 2006-2014 • info@greateyes.de • V06/2014
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Inspection Capabilities
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Micro-Crack Identification
Shunt Detection
Potential Induced Degradation (PID)
Finger Defects
Dead Cells
Broken Cells
Hotspots (partially)
Inhomogeneities and Impurities
Areas of Application
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Direct Inspection of Solar Modules at the PV Power Plant
Inspection of Rooftop PV Installations
Incoming Goods Inspection
Failure Analysis of the PV Power Plant
Pre-delivery Inspection at the Manufacturer or Trading Company
Final Inspection before Installation
Documentation Purposes
Acceptance Tests
System's Benefits
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No need to demount the Solar Module (save time/cost)
Direct outdoor Measurements possible
Excellent Sensitivity and Image Quality
Quick Measurements (~2sec for c-Si Solar Modules)
No dark Box or Cover needed
Mobile Solution, no Transport Vehicles needed
Battery based System allows independent Operation
Successfully tested on various Solar Cell/ Module Types
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Monocrystalline Silicon (mono-Si)
Polycrystalline Silicon (poly-Si)
Amorphous Silicon (a-Si)
Copper Indium Sulfide (CIS)
Copper Indium Gallium Selenide (CIGS)
Cadmium Telluride (CdTe)
Heterojunction with Intrinsic Thin Layer (HIT)
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Battery-powered LumiSolarOutdoor System
The battery based version of the LumiSolarOutdoor system does not need any external
power source. A powerful battery generates the electricity for both, camera and the solar
module being measured. It is possible to apply up to 100V and 7.5A to the module.
Specifications
Application
Electroluminescence Inspection of Single Modules
directly on-site
EL Image Size
1024 × 1024 Pixels
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2048 × 2048 Pixels
Resolution (for Modules sized 1.7m × 1m)
1.6mm/Pixel
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850µm/Pixel
Dynamic Range
16 bit
Image Output Data
BMP, JPEG, raw data or TXT file
Measurement time
~2 sec for c-Si Solar Modules
Min. Distance Camera ↔ Module
0.25m
Typ. Distance Camera ↔ Module
3m-5m
Outdoor light conditions
night sky, late twilight time
Module Power Supply from Battery
max. 100V / 7.5A / 750W
Number of Measurements with single battery
charge
200-500 modules. Independent of the battery, the
system can be powered separately through a standard
100-240V~ socket
Dimensions of Trolley (Wheels included),
height × width × depth
75cm × 57cm × 38cm
Total System Weight
37kg
Schematic measurement set-up:
Imaging System
Central Control Unit /
Data Analysis
Battery powered
750W Power Supply
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Line-powered LumiSolarOutdoor System
The mains operated LumiSolarOutdoor system is capable of powering a whole string of
modules at once. In a step-wise procedure the operator will still take an image of each
module individually in order to increase image quality and resolution. The 10kW power
supply of the line-powered version needs to be fed by 32A-three-phase electric power.
Specifications
Application
Electroluminescence Inspection of complete strings
directly on-site
EL Image Size
1024 × 1024 Pixels
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2048 × 2048 Pixels
Resolution (for Modules sized 1.7m × 1m)
1.6mm/Pixel
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850µm/Pixel
Dynamic Range
16 bit
Image Output Data
BMP, JPEG, raw data or TXT file
Measurement time
~2 sec for c-Si Solar modules
Min. Distance Camera ↔ Module
0.25m
Typ. Distance Camera ↔ Module
3m-5m
Outdoor Light Conditions
night sky, late twilight time
Power Supply for String
max. 1000V / 30A / 10kW
Number of Measurements
not limited, line powered operation
Dimensions of Trolley (Wheels included),
length × width × height
100cm × 72cm × 64cm
Total System Weight
65kg
Schematic measurement set-up:
EL Overview Image
of a String
10kW Power Supply
for Module Strings
Imaging System
Control Unit / Image
Acquisition and Analysis
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High Performance greateyes Cameras GE 1024 1024 BI MID | GE 2048 2048 BI MID
Both versions of the LumiSolarOutsoor systems make use of a scientific high
performance camera which was developed especially for low light detection in the near
infrared region. In order to obtain perfect image quality when working outside in the field
it is essential to keep disturbing influences like wind, ambient radiation, etc. to a
minimum. Short exposures are key here. This is realised by big pixel sizes, a backilluminted sensor with NIR coating (→ high quantum efficiency), high-end lenses, and
state of the art low noise electronics. Two camera models are available – a one
megapixel solution respectively a 4 magapixel solution.
Image of the camera (similar model)
CCD Sensor Specifications
Architecture:
Type:
Sensor Coating:
Pixel Format:
Sensor Array:
Pixel Size:
Full-Well Capacity:
Max. Dynamic Range:
Full-Frame CCD, Advanced Inverted Mode (AIMO)
Back-illuminated
Midband Coating for high QE in the NIR
1024 × 1024
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2048 × 2048
13.3mm × 13.3mm
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27.6mm × 27.6mm
13µm × 13µm
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13.5µm × 13.5µm
100,000e|
100,000e50,000:1
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33,333:1
Camera Specifications
Flange:
Objective Adapter:
Objective:
Readout Speed:
ADC Resolution:
Sensor Cooling:
Interface:
Power Supply:
Standard Camera Flange
M42
NIR coated 25mm Objective
250; 500kHz, 1,0; 1,8; 2,3; 2.8Mhz
16 bit
-20°C – 20°C, Forced Air
USB 2.0
100-240V~, 1A
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LumiSolarOutdoor Software
The LumiSolarOutdoor software controls the camera as well as the power supply. It is
furthermore used to capture and visualise electroluminescence images. Additionally,
intensity profiles of the 16 bit high dynamic range image data can be displayed. Besides
some image manipulation functions the software also offers image and data analysis
features. Some of the main software functions are listed below.
Screenshot LumiSolarOutdoor Software
Software Functions
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Save, Quicksave, Load Images
Supported File Formats: BMP, JPEG, TXT and Raw Data
Single Image Mode, Video Mode
Automatic Background Subtraction
False-Color-Representation of Images
Intensity Slices in x and y Direction
Linear/Logarithmic Scaling
Zoom functions / Image Viewer
Remote Control of Power Supply
Dimension Measurements of Artefacts following initial Calibration
Mean Intensity
Soft- and Hardware Requirements
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PC or Notebook with Windows XP / Windows Vista / Windows 7 (32 bit)
USB 2.0 Interface / serial Port
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Other Common System Components
Computer System
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Notebook with pre-installed LumiSolarOutdoor Software
Intel CPU Core i5, 4 GB DDR3 RAM, 320 GB Hard Disk
15.6″ TFT Screen
DVD Writer
Windows 7, 32 bit
Tripod
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Stable Tripod for solid positioning of the Camera (see Image below)
Fully flexible 360° Fixation of the Camera
Maximum Height: 4m
Image of tripod and battery-powered LumiSolarOutdoor system
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Appendix
EL image of a polycrystalline solar module captured by the LumiSolarOutdoor system:
© greateyes GmbH
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