Solar Panel Temperature Lose Efficeincy

Photovoltaic modules are tested at a temperature of 25 degrees c stc about 77 degrees f and depending on their installed location heat can reduce output efficiency by 10 25.

Solar panel temperature lose efficeincy. For example when the temperature coefficient is minus 0 5 percent it means that efficiency decreases by 0 5 percent for every degree above 25 c or every 33 8 degrees above 77 f. As the temperature of the solar panel increases its output current increases exponentially while the voltage output is reduced linearly. Here are some of the factors that influence the panel s temperature. The hotter a panel gets the less power it generates the ambient temperature temperature coefficient of the actual panel and the type of installation are all factors that affect the yield potential of a solar power system.

Within the scope of the solar panel s temperature coefficient the primary way to mitigate loss in efficiency is through the reduction in the temperature of your solar panels. The temperature coefficient tells us the rate of how much will solar panel efficiency drop when the temperature will rise by one degree celsius 33 8 f. A field experiment in the united kingdom revealed a drop of 1 1 of. If you have solar panels with an efficiency rating of 17 percent and a temperature coefficient of 0 45 they will lose 0 45 of their efficiency for every degree above 25 c.

The energy production efficiency of solar panels drops when the panel reaches hot temperatures. If the surface temperature of your roof increases to 30 c 86 f your solar panel s efficiency will fall to 16 7 percent. The effect of high temperatures. The effect of temperature on solar panel performance.