We decided to try our hand at producing electricity. Against the trend of investing in photovoltaics that has prevailed for some time, we decided to use hydropower. 1 kW of installed power in photovoltaic systems it gives about 1 MWh of energy annually, while from 1 kW of installed power on the river, about 5 MWh of energy can be obtained per year. Taking into account that for 1 MWh of energy from a solar power plant, PLN 245 can be obtained, and for the same amount of energy from a hydropower plant PLN 520, we decided to invest in hydropower. The first step was to purchase a small hydropower plant in Kolbudy. The power plant is located on the Reknica River, 25 km on west of Gdańsk. The power plant was built on a weir with a damming height of 5.8 m and was equipped with two turbines: a fully automatic Francis turbine and a much smaller Banki turbine. The average annual water flow is 450 l/s. This set of turbines produces approximately 50 mWh of electricity sold to the energy network annually, that is as much as 8-10 households use annually. With a theoretical river power of 25 kW and a usable power of 17 kW, the river is currently being produced 5 kWh/h on average, which is less than 1/3 of the available power. After the modernization of the power plant planned for the coming year and the installation of a modern Kaplan turbine with a much higher efficiency, we will double our energy production. We are publishing more information on this on the new website www.tce-energy.com.