The left picture above shows the traditional module layout design for a detached house. Roof area 1 and area 2 are shaded.  To avoid the impact of the limiting factors on the overall energy yield, modules will not be installed in the shaded areas.  Moreover, modules can be installed in only two directions because the inverter has only two MPPTs. 

The right picture shows the Smart Module Controller solution. With optimizers, modules can be installed in the shaded areas  without affecting the energy yield of other modules in the string, and modules with different orientations can be connected to  the same string. This simplifies system design, maximizes installed capacity and increases energy yield