Mismatch Loss

[Shashank Sharma]

What is the difference between 'Module Mismatch' and 'String Voltage Mismatch' ?

[André Mermoud]

We name "Module Mismatch" the mismatch between modules in a PV array.

However this is highly dominated by the mismatch due to current differences (i.e. within a string).  Because the current of the string is driven by the current of the weakest module in the string.

The mismatch in voltage between 2 strings with "reasonable" voltage differences (some few percents) is very low.

You have a tool for analyzing this in PVsyst, button "Detailed losses" => "Module quality - LID  -Mismatch",  page, button "Detailed study".