Eva Discoloration Solar Panels

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Eva discoloration solar panels.

Eva browning is defined as a change in color of the eva film. When a low quality eva is used the structure of the eva is altered when exposed to heat and uv radiation. Solar panel discolouration yellowing and browning occurs when exposed to sunlight in the first few years. Discoloration itself may not be directly related to power performance of pv modules.

Acetic acid and other volatile organic components are also produced from the. Not my job you had one job. First let s talk about what solar panel discoloration is and why it occurs. There are two main.

Eva or ethylene vinyl acetate is used as an encapsulant in crystalline silicon pv modules. 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. As a result the eva starts turning to a yellow or brown colour. Solar panel discoloration solar panel blemishes.

However discolored eva encapsulant is reported to cause a loss of light transmission to the solar cells leading to loss in power production by up to 0 5 a year by average or up to 1 a year in subtropical climates and this loss can be as high as 10 a year in case of mirror concentrated pv systems in desert conditions.