Several years have passed since the introduction of the institute of prosumer into the legal system of the Republic of Serbia. The development of regulatory framework and technologies of photovoltaic panels, as well as the decline in investment costs and the increase in electricity prices, have resulted in a great interest in the construction of photovoltaic systems on commercial and residential buildings in the Republic of Serbia. We are witnessing an increasing number of requests for connection of prosumers to the electricity distribution system and generally an increasing total installed capacity for the production of electricity from renewable sources, of which a certain part consists of prosumers. The existing legislation establishes the method of calculating electricity of prosumers. The regulations clearly regulates the way of balancing electricity of prosumers, as well as the relationship between the prosumer with the supplier or operator of the electricity distribution system. In expert circles, there are frequent debates about whether it is possible to improve the existing model of electricity calculation of prosumers and the way on which this improvement can be carried out. This paper will present a new model of calculating electricity of prosumers. Existing legislation will also be analysed in order to enable the improvement of the regulatory framework for the purpose of implementing the proposed solutions. The paper will analyse an example of electricity consumption at the level of a household. There will also be an analysis of the possibilities of the observed household for acquiring the prosumer status. A comparative overview of the calculation of electricity to prosumers will be presented according to the existing legal model of electricity calculation as well as the model that is presented within this paper. Finally, the impact of the proposed alternative model on the prosumer, supplier, balance-responsible party and distribution system operators will be analysed, as well as their mutual relations.