Reason for me to define unbalanced MPPT is cause I don't have equal proportion of two modules sub-arrays, I have two different types of modules in ratio of 10:90(for example), then I have to divide my MPPT in "unbalanced" way. When i define the two different modules I take them as two sub array on same inverter, one as main and other as secondary; But yet again this is showing two inverters instead of one, although the output is calculated as per one inverter only.