Eva Discoloration Solar Panels

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.

Eva discoloration solar panels.

Solar panel discolouration yellowing and browning occurs when exposed to sunlight in the first few years. When a low quality eva is used the structure of the eva is altered when exposed to heat and uv radiation. 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. Not my job you had one job.

Discoloration itself may not be directly related to power performance of pv modules. Essentially an acetic acid formation is the problem but not too blame. First let s talk about what solar panel discoloration is and why it occurs. 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.

As a result the eva starts turning to a yellow or brown colour. We ll get to that. Eva browning is defined as a change in color of the eva film. There are two main.

Eva or ethylene vinyl acetate is used as an encapsulant in crystalline silicon pv modules.