Capacity-dependent tariffs and residential energy management for photovoltaic storage systems

Due to the rising energy prices and the decreasing production costs of photovoltaic systems and accumulators, the use of energy storage in private households will inevitably become more and more attractive. If their mode of operation is only focused on maximizing the owner´s self-sufficiency such storage does not improve the overall system. In this paper, a capacity-dependent tariff which is added to the retail prices is proposed, as an incentive for a grid-benefiting storage operation. The advantages compared to an uncoordinated storage operating mode are investigated. In particular, it can be demonstrated how extreme residual loads are reduced and the overall load profile of the household is smoothed by the use of an optimized storage. The annual cost savings for a private household as a result of the chosen energy price structure are shown as well.