Eva Discoloration Solar Panels

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Eva discoloration solar panels.

Solar panel discoloration solar panel blemishes. Essentially an acetic acid formation is the problem but not too blame. Acetic acid and other volatile organic components are also produced from the. When a low quality eva is used the structure of the eva is altered when exposed to heat and uv radiation.

We ll get to that. The eva discoloration is caused by the formation of polyconjugated c c sub n sub double bonds of various lengths. Eva or ethylene vinyl acetate is used as an encapsulant in crystalline silicon pv modules. First let s talk about what solar panel discoloration is and why it occurs.

Browning in the modules happen when certain additives used to prevent browning and enhance uv tolerance start to disappear after losing strength against uv rays. There are two main. Solar panel discolouration yellowing and browning occurs when exposed to sunlight in the first few years. Identifying early stage discoloration in the ethylene vinyl acetate eva copolymer encapsulants used for crystalline solar module lamination can spot panel degradation before power output is.

Discoloration itself may not be directly related to power performance of pv modules.