The work describes the analysis of electricity supply to a rather unusual facility - the Stary Sobieski clean water reservoir located in Gdansk, in the direct neigbourhood of Gdansk University of Technology, which was adapted for museum purposes. It is a very large-volume facility, entirely underground, so constant air treatment is required there to ensure the comfort of visitors and service, as well as the safety of exhibits what generates significant maintenance costs when powered from the municipal electricity network. The variant of building a wind farm with selling surplus energy to the grid was analyzed. All analyzes and calculations were carried out on the basis of precisely identified conditions of the model object, results of direct geological research and current meteorological datas. The great value of this work is that Meteorological data are strictly local and allow for operational analysis both in the long and short term - in the scale of one year with an accuracy of one day. The formal and legal aspects related to the location of the wind farm within the urban space have been widely analyzed. An interesting environmental aspect was also discussed, related to the location of the object on the migration route of bats and the occurrence of bat wintering grounds in the vicinity. The analysis takes into account the following conditions: a) the current trend in the field of distributed cogeneration and the inclusion of small generators in the PPS, b) fulfillment by Poland of its treaty obligations in the field of phasing out primary fuels and developing renewable energy sources, c) the pro-ecological strategy of the owner of the facility, d) activity profile of the Gdańsk University of Technology, adjacent to the facility, conducting research and teaching in the field of ecology and renewable energy.