IVENDO Solar company deals with all the information that an investor needs. In addition, our representatives are able to answer any questions regarding design, implementation, modules, and even PV panel installation. Among other things, the energy efficiency of small power plants depends on the last mentioned. An important factor influencing this parameter is the roof's position relative to the world orientation. In Poland, it is best to orient the roof towards the south. Roof angles and terrain obstacles that can cause periodic shadows are also important. If photovoltaic panels are partially or completely shaded, their production capacity is weakened. This translates into finances for a house or company, as well as an extended investment return period. Also, shading does not guarantee maximum system efficiency. Therefore, the installation of solar panels on sloping roofs should be carefully planned and prepared.