Abstract
Energy consumers can invest in photovoltaic (PV) panels and become prosumers. The benefit of such an investment depends on the regulatory framework. We consider a population of heterogenous consumers, with respect to both the cost of decentralized production and their degree of self-consumption.it is efficient to have investment by low-cost and high self-consumption profiles. We determine the optimal tariff in the presence of heterogenous prosumers. Net metering fails to screen consumers on the self-consumption dimension. Net purchasing can lead to the efficient investment if the tariffs are non-Coasian that is fixed fees exceed the grid operator's fixed costs.