Array Oper V X X G T Battery Charge V Y Y

[bendesa1962]

Hello,

During the design of a stand alone system I get the orange warning 

"Array Oper V X X G T Battery Charge V Y Y, This will result in not optimal use of the PV modules (MPP loss)"

It's not clear what this means?  What do I need to do to solve this?

Many thanks

Kind regards

Ben