Good Solar Panel Temperture Coefficient

Solar module power loss.

Good solar panel temperture coefficient.

The closer the temperature coefficient is to zero the better the panel will perform when the temperature rises. It denotes the change in power for 1 degree change in kelvin or celsius both are the same on a unit level above 25 c. The maximum power temperature coefficient listed for sharp solar panels is 0 49 per c. For example sunpower s solar panels all have a temperature coefficient of 0 37 c.

As a solar panel increases in temperature the power output of the solar panel decreases. This would equal a loss of 0 86 watts 0 49 x 175 watts of power output for each degree. The effect of temperature on the solar panel s power is measured by its thermal coefficient expressed as k or c. 40 c x 0 41 16 4 which means that the module loses 16 4 in power output when the cells reach 65 c.

What this means is that for every 1 c above 25 c sunpower s solar panels decrease in efficiency by 0 37. Generally monocrystalline solar cells have a temperature coefficient of 0 5 degc. Most panels have a temperature coefficient of between 0 2 c to 0 5 c when tested under standard laboratory conditions where ambient temperature is set to 25 c. This means a mono solar panel will lose half of one percent of its power for every degree the temperature rises.

A negative sign indicates the direction of the change. Most solar panels have a temperature coefficient of around 0 3 c to 0 5 c. 16 4 x 260w 42 64w.