The experience proves that solar power installations worldwide are growing rapidly. Renewable energy sources other one as solar energy has the potential to reduce the ecological footprint. The converter that utilizes renewable energy technologies and methods are constantly evolving with their spread, purchasing goods are becoming more and more favorable. In this study the measurement of the time period March 1-31 is presented at a waterworks. During the measurement, hourly recordings were taken. During the study, load power, generated power, grid power, specific electricity consumption, electricity consumed distribution, and the energy cost were determined.