OLAR photovoltaic (PV) resources are the most commonly observed form of distributed generation at the residential customer premises in low voltage (LV) distribution networks. Depending on their capacity, the rooftop solar PV units share the proportions of loads connected at the AC mains of residential households. Serving part of the loads locally by PV resources help to reduce stress on the distribution feeder and can improve system performance by reducing feeder loss and releasing system capacity. At the same time, integration of PV resources at a high penetration level can impose several challenges for distribution network operators. Voltage rise problem has been reported as one of those major concerns [1-3].