Types of solar panel backsheet defects.
Backsheet of solar panel material.
Tedlar is the brand name of the american chemical company dupont and refers to polyvinyl fluoride pvf a thermoplastic fluoropolymer material.
The backsheet is typically a laminate of different polymer materials.
A reliable backsheet should be able to provide protection from moisture physical damage and uv rays while also minimizing the occurrence of electrical discharge and thermal.
Tpt and solar panels.
To date dupont has surveyed over 4 2 million panels from 275 solar fields and 79 module manufacturers accounting for over 1 04 gw.
For solar pv module backsheets.
The solar backsheet is the outermost layer in the module and protects the pv cells from environmental and other external conditions that can damage the delicate pv cells.
Most solar panel manufacturers use tpt for a solar backsheet.
The pv backsheet material you choose for your solar panel will have a considerable impact on how it withstands the elements and performs over the course of its lifetime.
Additionally the solar backsheet has dielectric properties to act as an insulator for the power generating modules.
Its primary purpose is to protect the solar panel components specifically the solar cells and wires from environmental elements such as stress or moisture which can degrade the 20 year life of solar panels.
It is followed by cell side yellowing and cell side cracking.
A backsheet is a required insulating film in all solar photovoltaic panels.
Pvdf and polyamide backsheet defects increased by 51 and 18 since last year.
Tedlar pvf backsheets maintain low 0 05 defect rates despite being the oldest installations dating back 35 years.
To insulate and protect the user from shock and provide the most reliable and efficient electrical conductivity possible.
A complete list of solar material companies involved in backsheet production for the crystalline panel process.
Tpt is the acronym of tedlar film pet tedlar film.
Tpt is one of the mostly applied polymer multi laminates for solar panels as there are only very few materials with comparably material qualities.
The panel s backsheet serves the same function that wire insulation serves in household wiring.
Most backsheets are made from petroleum based plastics.
More than half the world s 900 million solar panels have dupont materials in them and dupont materials have been time tested in more than 11 trillion panel hours of outdoor solar field installations globally since 1975.
Company directory 53 100 solar panels solar components solar materials production equipment.
The tedlar polyester tedlar material combination strengthens the material qualities of tedlar and is therefore used as backsheet of solar panels to enhance the longevity of the panels.
The illustrations from the report below show the 5 different categories of backsheet defects and their frequency.
