In the case of solar power, the decentralisation of power sources, for instance through rooftop installations, will also require substantial investments in the distribution network. In the case of wind power, the distance of production sites from the centres of consumption requires large investments in electrical transmission. While the diversification of renewable supply, interconnections with adjacent regions, storage and demand management can all play helpful roles in mitigating intermittency, the most cost-efficient solution at least in the medium-term is likely to remain the use of dispatchable capacity for electricity generation. There exist also additional systemic impacts on electricity systems stemming from the introduction of renewables such as the declining of electricity prices, the reduction of load factors for established plants and the de-optimisation of existing production structures.