News Article

DuPont Publishes 2020 Global PV Reliability Report


Data analyzed on 3 gigawatts of solar installations, 9 million panels and 551 installations

DuPont today released its latest Global Photovoltaic Reliability Report, with results from its highly developed field inspection and analysis program that monitors material degradation and its impact on module performance.

This unique and innovative program features a multi-step inspection protocol conducted by DuPont scientists and engineers in North America, Europe, Asia and the Middle East. A number of variables were analyzed in the course of the inspections including component, material, mounting, time in service and climate.

The 2020 field report was compiled from inspection and analysis of nearly 3 gigawatts (GW) of photovoltaic (PV) installations around the globe, spanning 9 million panels.

Key findings (compared to 2019):

  • Total module defects:30 percent
  • Total backsheet defects:16 percent
  • The overall outer layer cracking rate of polyvinylidene fluoride (PVDF) backsheets increased by more than three times

Emerging trends in backsheet failures include:

  • Rapid increase in cracking in PVDF backsheets
  • Cracking of inner layers
  • Delamination in double glass modules.

Four-fold increase in PVDF backsheet defects in arrays between 4 and 9 years' old.

“As we begin a new decade, DuPont continues to work on assessing how panels and materials are aging in the field, often with sobering results,” said Dr. Kaushik Roy Choudhury, senior scientist and global technology leader, DuPont Photovoltaic Solutions. “As materials scientists we apply our skills on diagnosing and analyzing degradation in actual outdoor conditions, of both traditional glass/backsheet panels, as well as newer dual glass bifacial modules. The learnings and insights we collect from the field continue to point to the vital importance of selecting the appropriate Bill of Materials for solar panels, to help protect investments for the long-term.”

The DuPont team has observed nearly a four-fold cumulative increase in PVDF outer-layer cracking defect rates, from 5 to 23 percent between year four and year nine after installation in China, Europe, India and North America. Deeper backsheet cracks have led to backsheet delamination, exposing the core layer to elements and leading in some instances to inverter tripping and ground faults.

Inner layer cracking has been frequently encountered in fluoroethylene vinyl ether (FEVE) and polyethylene terephthalate (PET) backsheets. This can directly impact power through delayed inverter starts, ground faults and fires.

“Delamination and cracking were observed in multiple double glass module installations,” Choudhury said. “Delamination appears to originate near edges of a module or at individual cells, while cracks likely originate at scratches or chips on glass surfaces and edges or at stress risers introduced by the racking system”.

The comprehensive report is intended to help buyers and investors understand the breadth of component degradation issues and module failures that can occur in the field. The report can be downloaded free of charge at

Ingeteam Supplies Solar Inverters For PV Project Of More Than 100MW In Chile
EnBW Chooses Delta Inverters For 2.62 MWp Solar Farm In Kenzingen
Luxcara Acquires Largest Independent PV Project In Germany From BELECTRIC
Azelio And JET ENERGY In MoU To Develop Storage Projects With Solar PV In Africa
Sonnedix Named ESG Global Solar Power Generation Sector Leader By GRESB
A Promising Boost To Kesterite Solar Cells
BayWa R.e. Sells Subsidy-free Solar Farm In Spain To Commerz Real’s Impact Fund Klimavest
Everoze Creates Skyray To Design And Engineer Great Solar PV Projects
Dr Armin Froitzheim Becomes SOLARWATT Chief Technology Officer
New Energy Scout GmbH Becomes Part Of Basler & Hofmann AG
New Innovation Set To Change Renewable Energy Market
Midsummer’s Solar Cells Can Reduce Truck Fuel Emissions By Up To 20 Percent
EnergyLink3 And C4V Lead Tesla In Race To Less Toxic Mobile Battery Solution
Solar Power As Rental Offer Launched By Aggreko
BISOL Supreme Facing Exceptional Sales
Faber Infrastructure Launches Container-based Power Supply
SunBrush Mobil Delivers Its New Cleaning Device For PV Tracking Systems To Chile
Researchers Pinpoint Way To Improve CIGS Solar Cells
What Role Can Solar Energy Play In Enabling A Better Future And Meeting The UN Sustainable Development Goals?
NextEnergy Capital Acquires Its First Asset In Portugal 17.4MWp Solar PV Project
Midsummer And Rollgum Corp Team Up To Bring Solar Roofs To The Iberian Peninsula
Sunstore Solar Launches WattGrid, A New Range Of Turnkey Off-grid Power Systems
ENGIE And Kiwi Power Enter Netherlands’ Grid Flexibility Market
UK'S Largest Battery Ready To Balance The Grid

Search the news archive

To close this popup you can press escape or click the close icon.
Register - Step 1

You may choose to subscribe to the Solar + Power Magazine, the Solar + Power Newsletter, or both. You may also request additional information if required, before submitting your application.

Please subscribe me to:


You chose the industry type of "Other"

Please enter the industry that you work in:
Please enter the industry that you work in: