Importance of Backsheet

Solar modules have to go through harsh environmental conditions like extreme heat & sunlight, and also excessive rain and humidity. They are expected to withstand such environmental stresses for 25 years without excessive degradation (<20%) in power for them to qualify for most applications.

Backsheet plays a key role in protecting the solar panel and giving it the required longevity.

Backsheet is a critical component in the construction of a PV Solar module. It is the outermost layer of the module which is designed to protect the inner components of the module. It not only acts like a shield against external stresses but also performs the important function of electric insulation. The major purpose of backsheet is to protect PV module from UV radiations, moisture penetration, electrical insulation of the system, and to offer durability to the PV module. The mechanical, electrical, optical and chemical properties and durability of backsheets are critical to the long-term reliability, durability and safety of the PV Solar modules.