The political and social aim of a climate-neutral transformation of the energy industry is inextricably linked by the need for a massive extension of renewable electric power generation capacity. Beyond this indisputable point, the question arises in which way the energy demand can be covered during periods without sufficient renewable energy generation. This question is currently answered differently in the European and global context. While on one side the continued use of fossil fuels in combination with CO2 storage is seen as a solution, the other side relies on short-term electricity storage and synthetic fuels for long-term storage. Cogeneration, which has been propagated in recent decades, must be reconsidered from this point of view. However, both variants are associated with an increase in new technology equipment. Currently, the integration of a heat pump (HP) into the previously Combined Heating and Power (CHP)-fed heating networks for covering the heat demand in times of regenerative surplus is particularly obvious in order to reduce the consumption of fossil fuels and CO2 emissions. This publication proposes further integration of a reversible heat pump Organic Rankine Cycle (ORC) unit, creating a prosumer. In this context, "Power and Heat Prosumer" stands for a power plant network optimized for bi-directional power-driven operation coupled with a heating network. The enhancement of a HP to a reversible system is comparatively simple for scroll and screw compressors up to the single-digit MW range through the integration of a working fluid pump as well as slight adaptations to both the low-temperature heat exchanger and the peripheral equipment. The objective of using the prosumer is not only to supply heat from renewable electricity for the heating network, but also electricity during periods of renewable electricity shortage. The ORC operating mode thus increases flexibility and conversion efficiency. The application potential is illustrated by a case study of a typical 2 MW local heating network. With study data for the year 2045, the usefulness of the ORC operating mode can be validated. The overall economic goal, however, is to reduce the necessary addition of conventional peak load generation capacity through these small technical efforts. The maximum reduction potential consists of the capacity of installed reversible HPs multiplied by the ORC efficiency. In combination with a thermal storage, this results in the additional functionality of a Carnot battery, which can reduce the needed short-term storage capacity by the same amount.