Photovoltaic modules comprising a backsheet and electrical insulating layer(s) which are highly permeable to corrosive degradation by-products

摘要

The invention addresses the problem of generation and trapping of (acetic) acid within crystalline PV modules where such modules comprise encapsulant material at least partly on base of EVA or on at least partly on base of other acid generating material. To solve the object of the invention, one provides:- An insulating film (7) to electrically separate (insulate) conductive ribbons (6) from other conductive parts of the PV modules, like PV cells (4), such a film having a high permeability to acids, avoiding them to be locally trapped,- Encapsulants (2 and 5) with reduced generation of acids,- Backsheets (11 -10) having a high permeability to acids.;The present text describes also innovative backsheets comprising FPP layers and/or adapted Polyamide layers allowing achieving a relative thermal endurance or a RTI of 105°C or more.;A innnovative encapsulant is also described having excellent additives retention, transparency and allowing for reduced potential induced degradation of PV modules.