Different modules makes in a string

[RAMVEA]

Hi all,

We have a case where there is 2 strings 21 in each string with different module makes , so the voltage flowing through the strings will be some where 800 & 815 respectively. so will there be any flow in reverse current in the 800 V string.

if there is any reverse current flow, what value of current will be flowing.

Until what voltage difference, the reverse current may flow.