Phil calculate home builders and owners optimal planning of photovoltaic systems. Thanks to their detailed data collection and calculation, the web app is also suitable for use in the professional field. Step by step you share with Phil the relevant data for its calculations. The solar calculator requires, among other things the location of the building concerned and length specifications to the roof. Interruptions in the roof surface such as windows, chimneys, dormers and similar concerns, the wizard with one. Furthermore, provides users with a database of more than 35,000 photovoltaic modules from manufacturers all over the world to help. When you have found something suitable for his needs here, Phil automatically determines the optimal distribution of elements on the roof surface. In addition, the calculator gives an indication of whether the feeding excess energy into power grids is worth or not. Finally, Phil produced a clear analysis in the form of a PDF document. By the way: In order to save the calculations for re-uses a free application from the manufacturer is required.