The rapid growth of photovoltaic (PV) penetration on low voltage (LV) distribution systems is creating new challenges for utilities worldwide. In this context, this paper assesses the performance of Volt-var and Volt-Watt controls for planning and operation perspectives. These controls are tested in PV generators deployed on 419 real Brazilian LV systems in scenarios with massive PV penetration. The results are evaluated on how well the controls can improve the following aspects: hosting capacity (planning); mitigation on overvoltage violations (operation); and reduction of LV systems with customers experiencing overvoltages (operation). Additionally, the negative impacts of the controls, e.g., energy curtailment and increase of technical losses, are analyzed. For the hosting capacity, the Volt-Watt control outperformed, accommodating 46 more PV generators, but it presented an energy curtailment up to 12.5%. For the operational perspective, the Volt-var control has a slightly better performance, but it increased the technical losses up to 3.5%. This discussion is generalized with the assessment of 116,232 LV systems.