This paper describes a method to determine the Hosting Capacity (HC) for solar Photovoltaics (PV) in distribution networks. The method uses hourly load data and roof-top PV power production simulation data in a commercial Network Information System (NIS). The HC – defined as the maximum amount of new PV that can be connected without endangering the reliability or quality for other customers - is monitored for each node in the network with different proportions of the buildings having PV installations. The times- series of PV power generation are influenced by both local weather conditions and shading to ensure that only profitable installations are simulated. The method captures the variability of load and production and enables simultaneous evaluation of several of the most common mitigation actions in networks with high PV penetration. Presented is a case study of a network with 51 secondary substations and 534 customer networks in central Sweden. With PV applied to 10% of the best roof locations, some local voltage issues arise. With limited mitigation actions at critical locations the network can host as much of 30% of the best roof-top locations having PV.