Generating electricity using fossil fuels can increase global warming. To reduce the use of fossil fuels, the implementation of Renewable Energy becomes a choice. One example is a Photovoltaic (PV) installation connected to a grid. The addition of on-grid PV on the load side may provide an undesirable effect for low voltage distribution networks where there are a lot of customers. The most possible effect as PV grid supplies during full sunlight is increasing voltage. This condition may cause severe damage to electrical appliances. The purpose of this work is to analyze changes in power quality parameters, especially for the voltage that occurs as PV supplies full power when irradiation in the range of 90%-100%. A 4 kWp (kilo Watt peak) solar power generation is installed at the salt processing business in Pati Regency, Central Java. The behavior analysis of the low voltage network is proposed to be carried out by the ETAP 12.6 software. During the work, the presence of tapping of the nearest transformer is considered. The experimental results are expected to lead to the indication of the impact of PV on-grid supplies on the low-voltage network.