With power categories ranging from 5.0 to 20.0 kW, the transformerless Fronius Symo is the three-phase inverter for systems of every size. Owing to the Superflex Design, the Fronius Symo is the perfect answer to irregularly shaped or multi-oriented roofs. symo range (5,6,7,8.2,10,12.5,15,17.5,20)