Siliken Atakama ATK-P60, Instructions For Use Manual

Page: 20 / 34

19
The voltage and current dependence with temperature is defined by a
linear function. On one hand the voltage decreases as the temperature
increases at a ratio of – 2.15 mV/ ºC per cell in series. On the other, the
current increases at +3.50 mA/ºC. Therefore, of the 7.5 to 8 amps that
the module is capable of generating at 77º F / 25°C, the current increases
slightly with each degree centigrade of increase in the module temperature,
while the voltage decreases.
In general, we observe a decrease of the photovoltaic module power as
the operating temperature increases, at a ratio of -0.47%/ºC. For example,
a module of 220 Wp will lose 0.95 Wp for every additional °C in the cells.
The module operates at between 122 and 158 ºF / 50 and 70°C when
it generates electricity with radiation of between 800 and 1100 W/m
2
and a wind speed of less than 1 m/s.
Current-voltage curves