.The design and function of the Fronius IG Plus unit offers a maximum level of safety, both during installation as well as in operation. The Fronius IG Plus provides operator and equipment protection through: a) galvanic isolation b) monitoring the grid

 The Fronius IG Plus is equipped with a high frequency transformer that ensures galvanic isolation between the DC side and the grid, thus ensuring the highest possible safety.

 Whenever conditions in the electric grid are inconsistent with standard conditions for example grid switch-off, interruption, etc.), your Fronius IG Plus unit will immediately stop operating and interrupt the supply of power into the grid

 The Fronius IG Plus unit transforms the direct current generated by the solar modules into alternating current. This alternating current is fed into your home system or into the public grid and synchronized with the voltage that is used there.

 The Fronius IG Plus has been designed exclusively for use in grid connected photovoltaic systems. It cannot generate electric power independent from the grid.

 The Fronius IG Plus is fully automatic. Starting at sunrise, as soon as the solar modules generate enough power, the automatic control unit starts monitoring voltage and frequency. As soon as there is a sufficient level of irradiance, your solar inverter starts feeding energy to the grid. The control system of the Fronius IG Plus unit ensures that the maximum possible power output is drawn from the solar modules at all times. This function is called MPPT (Maximum Power Point Tracking).

 As dusk starts and there is no longer sufficient energy available to feed power into the grid, the Fronius IG Plus unit shuts down the grid connection completely and stops operating. All settings and data recorded are saved.

 The Fronius IG Plus is designed for various system upgrades, e.g.:

• Upgrades that enable Fronius IG Plus to communicate with external system upgrades as well as other inverters
• Datalogger and modem interface, Ethernet/Internet connection (for using a PC to record and manage data from your photovoltaic system)
• Various large-format displays
• Living room display (Fronius Personal Display)
• Sensors (e.g. for temperature, irradiance, energy meter, wind speed)
• Interface cards

The temperature controlled, variable speed fan with ball bearing support of the Fronius IG Plus provides:

• optimal inverter cooling
• efficiency increases
• cooler components, thus improving service life
• least possible energy consumption and noise level

 Should there be insufficient heat dissipation in spite of the fan operating at maximum speed (for example inadequate heat transfer away from the heat sinks) the power will be derated for protection of the Fronius IG Plus unit.

 Derating the power reduces the output of the Fronius IG Plus unit for a short period sufficient to ensure that the temperature will not exceed the admissible limit.  Your Fronius IG Plus unit will remain ready for operation as long as possible without any interruption.