Photovoltaic panels with aging backsheet

Does aging affect PV backsheet performance?

As discussed previously, the actual aging environment may have more complex aging mechanisms, and these mechanisms may be interrelated. Although some test standards such as IEC 61215 have been proposed and are constantly revised, they are not enough to reliably predict the long-term performance of PV backsheet.

Does electrical-induced degradation affect PV backsheet performance?

Electrical-induced degradation is also an important factor that affects PV backsheet easily during the operation of PV system. Since 2011, the influence of electrical-induced degradation on the performance of PV backsheet has received considerable attention, which provides significant theories and methods for subsequent research.

What is a PV backsheet?

Figure 1 a shows the structure of the PV modules. Backsheets are commonly used in PV modules for providing excellent electrical insulation and mechanical properties. (5−8) PV backsheets always are subjected to UV light, heat, humidity, and so on, which can result in aging and performance loss, (9) as shown in Figure 1 b.

What is a photovoltaic backsheet?

Backsheets constitute the rear side outermost layer of protection for the active components of standard photovoltaic (PV) modules. One typical backsheet type is comprised of an opaque multi-layer laminated polymeric sheet on the rear side of the module. A thicker core layer provides insulating properties and mechanical strength.

Does encapsulant and backsheet affect electrical output power of PV test modules?

Based on experimental results, the influence of the type of encapsulant and backsheet (i) on the electrical output power of PV test modules and (ii) on the aging-related electrical and material degradation under accelerated stress tests was estimated using statistical modelling approaches.

Why do we need a backsheet for PV modules?

In addition, the backsheet can allow acetic acid to pass through effectively to reduce internal corrosion, and the excellent optical properties of such backsheets can also improve the output of PV module. The future of the co-extrusion process for the production of backsheets requires a high degree of attention.