Summary: The article presents the influence of photovoltaic sources on selected parameters characterizing the operating conditions of a low voltage network. A cable network supplying residential consumers was chosen for the analyzes (the network is part of the CIGRE test network). The simulations were carried out by using the OpenDSS software, for two levels of installed capacity in photovoltaic micro-installations. The influence of photovoltaic generation on voltage levels, current flows, and energy losses was analyzed.