What temperature correction factor is used for voltage calculation in photovoltaic systems?

In photovoltaic systems, the temperature correction factor is crucial for accurately calculating voltage, particularly because solar panels can exhibit varying performance based on temperature fluctuations. The correct factor of 1.25 is used to account for the reduction in voltage that occurs as temperatures rise. This factor ensures that when higher temperatures are encountered, which can decrease the output voltage of the solar cells, the calculations reflect the performance more realistically.

Using a correction factor of 1.25 helps in designing and sizing electrical systems accurately. It ensures that the system can handle these variations and operate efficiently under different environmental conditions. Factors like efficiency and safety margins are critical in electrical installations, and applying this specific factor helps to maintain optimal system performance and reliability, protecting both equipment and users.

In contrast, the other values do not align with standard practices for temperature corrections in photovoltaic systems. Each of those numbers may be appropriate in different contexts or calculations, but for voltage calculations in photovoltaic applications, 1.25 is recognized as the accurate temperature correction factor.