In this video we show how to plan or change row Spacing or maintenance Walkways for PV systems on flat roofs in K2 Base. Maintenance walkways are needed to reach each desired module row for cleaning and/or maintenance, or to deliberately create more space between them. Thus, an employee should be able to move around in these spaces. In K2 Base, this is basically set via the row spacing in the control panel. However, it can also be realised via thermal separations or separate module fields.