EVA Film Ultra Fast Cure EU307

Is Eva a good encapsulant for PV panels?

As a further side note, the use of EVA as encapsulant for PV panels came from the U.S. JPL Low-Cost Silicon Array Program in the late 1970s. However, JPL did warn in their development that EVA could have such problems under those harsh conditions.

What is Eva used for?

For PV applications, the EVA contains up to 28–33 wt% of vinyl acetate, compounded with additives such as curing agents, ultra violet (UV) absorbers, photo antioxidants and thermo antioxidants . To inhibit degradative reactions, some additives are added to the usual EVA.

How does Eva encapsulation affect PV module aging?

PV module aging demands on optical coupling between the EVA encapsulant and PV cells in which the polymer acts as protection against environmental stress. The major external parameters which influence the structural EVA integrity are temperature, and UV radiation content from sunlight transmitted through the EVA encapsulant.

What happens if Eva encapsulant is degraded?

Degradation of EVA encapsulant generates unsaturations and carbonyl bonds which affect the optical properties of EVA and decrease the efficiency of modules . The opacity index (attenuation coefficient) is increased by the generation of chromophores, partially blocking the transmitted light to the solar cell.

What are the advantages and disadvantages of Eva encapsulation?

Kim et al. (2016) reported as an advantage the low cost of EVA and as a disadvantage its vulnerability to UV radiation . Polymers such as PDMS, PVB, TPU and Ionomer have appeared as good alternatives to EVA and were tested by Hasan and Afrif (2014) for better encapsulation of PV modules.

What are the methods of Eva degradation analysis?

Peike et al. (2011), the most common methods for the EVA degradation analyzes are destructive methods such as thermogravimetric analysis, thermal analysis or measurements of transmission and reflection.