System_String Size

[Kanagavel K]

Dear PVsyst Team,

The string range in PVsyst is displayed according to the design temperature settings, if I’m not mistaken. After adjusting the design temperature to match only the minimum GHI available hours, the string range shows a larger size. This also match with our string sizing calculation. It would be beneficial if PVsyst could automatically recognize and adjust the design temperature based on the GHI available hours.

 

[Linda Thoren]

Hello,

Indeed, in the Project settings you can define Site-dependent design parameters and the "Lower temperature for Absolute Voltage limit" ensures that an error message is triggered if this limit is exceeded. This value is typically set based on the coldest recorded temperature over the past 10 years to protect system components. Adjusting this value can indeed affect the maximum number of modules allowed in series. However, PVsyst does not currently adjust this setting automatically.