In this publication the validity of the implementation and operation of the microinstallations of the renewable energy sources about a power of 3 kW for a photovoltaic installation of roof and wind power plant. Examples of the technical solution researched types of micro-installations have been proposed. It was estimated the value of inputs to execute and run the installation, computed the profits from the sale of electricity produced. Return time is specified to be incurred for the execution of the installations.