Software for the planning, analysis and simulation of photovoltaic systems - both grid-connected and stand-alone. A professional tool for planners, engineers and energy specialists, PV*SOL can also be used for education purposes by universities and research institutes. The calculations are based on an hourly data balance and results can be presented in graphic form, in a detailed project report or in a results summary. The system components (PV module, inverter and consumption profiles) are loaded as units from the systems database. The database can be easily extended to include user-defined components.