Resting input voltage curiosity.

[mtdoc]

I realize that it is normal to display a low resting input voltage when dark.  I think I read somewhere that is should be about 1/2 of battery voltage.  With my first Array and Classic that is true. The resting input voltage is at about 30 for my 48 V system.

Here's the curious thing.  My second array with a second Classic connected to the same battery bank shows a resting input voltage of 14. 

They both work great. No worries, just curious.  Why the difference?   

[boB]

I realize that it is normal to display a low resting input voltage when dark.  I think I read somewhere that is should be about 1/2 of battery voltage.  With my first Array and Classic that is true. The resting input voltage is at about 30 for my 48 V system.

Here's the curious thing.  My second array with a second Classic connected to the same battery bank shows a resting input voltage of 14. 

They both work great. No worries, just curious.  Why the difference?

Sometimes the input source just happens to load the input down some.  I have seen some Classics that went down much lower
than 14 volts from a 24 volt battery.  I think it was the PV array.  Also, a large array may tend to load the input down more.
Especially older PV modules with a bit more leakage.

boB