Due to the fundamental changes in the energy system, electricity load profiles in residential areas are expected to change profoundly in the coming decades. Until now, the effects of the energy transition for the power system are mainly studied using synthetic load profiles. In this paper, load measurements from three different newly built residential areas were used to study the (local) impact of an increasing penetration of PV panels and heat pumps. Using these measurements, the bottlenecks and opportunities due to these technologies are identified. The results can be used to reflect and possibly optimize the residential load models used by distribution system operators for network planning, allocation and reconciliation processes