1 GENERAL INFORMATION
The Energy Management Function on the Fronius Datamanager essentially allows the power produced from the
solar system to “divert” to a load instead of exporting it to the grid.
The Fronius Datamanager comes built-in in the inverter series Fronius Galvo, Primo, Symo, Eco and can be
retrofitted to Fronius IG, IG Plus, and CL. The Fronius Datamanager is available as card or box.
A key feature allows an external load to be turned ON or OFF depending on the amount of power the inverter is
producing or according to the amount of production being consumed on-site.
Using a Fronius Smart Meter (energy meter) in the installation allows the consumption to be taken into account
and therefore a load can be switched on whenever there is surplus power available that can be used on site
instead of feeding it into the grid. This increases the self-consumption ratio. Without the energy meter in the
system loads can be controlled accordingly to the output power of the inverter.
The Energy Management Function puts out one signal. It can be potentially used to switch electric hot water
heater, heat pump, pool pump, air conditioner, bore pump, etc.
This document describes how to use the functionality and setup of the Energy Management Function of the
Fronius Datamanager.
1.1 System design
1.1.1 Switching loads via external relay
The digital output signal of the Datamanager controls an external relay which switches the load. The energy
meter measures the loads in order to calculate the available surplus power.
Figure 1 – Energy management function on external relay and energy meter
Fronius inverter with
Datamanager
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