With matching interfaces, Fronius system solutions not only communicate with the systems of the PV system operator, they also communicate with the utility companies and the grid operators. The data recorded by the inverter, such as the power of feeding in and the grid voltage, helps it to assess the state of the grid and respond as necessary. Grid operators can access Fronius inverters in photovoltaic systems remotely and control them accordingly. If a communications link is not available, Fronius inverters can activate intelligent, grid-supporting functions independently. Both these options increase the capacity of the grids for renewable energy and contribute to grid stability. The development of the energy supply world continues unabated. When intelligent and communicative functionalities need upgrading at a later date to meet future requirements, this will be easily done with a software update or a plug-in card. Existing Fronius system solutions are therefore not just compatible with the Smart Grids we have today, they will also be compatible with future technologies. For the system operator, this means they are extremely future-proof.