Low voltage networks are expected to see massive transformations in the next decades. The aim for a carbon neutral economy asks for high level penetration of renewables, where PV production in LV networks is an important part of the overall solution. The RES high penetration becomes however also a threat for grid operation, through challenges such as keeping voltage level in the accepted band, avoiding grid congestion and reverse power flow or ensuring an acceptable low level of energy losses. The paper analyses specific scenarios and suggests measures to address these limitations, by comparing business as usual operation with more advanced microgrid operation and the use of grid-side storage.