Small-scale farms are nowadays a common part of the agriculture system in Slovakia. Projects based on the renewable energy sources could be a possibility for the farmers to develop their farms. The objective of this work is to propose a solution of such RES based project to a farmer operating in the specific condition of the Middle Slovakia. For these purpose three alternatives have been chosen. All three alternative solutions focus on the sources currently available in the farm. After stating the amounts of energy that can be produced with the specific technology an economic model of calculating the net present value was applied. Two from the assessed alternatives are not recommendable due to the negative net present value calculated over the project life time.