Fronius Quick Guide - Energy Management Function on Fronius Datamanager 2.0 AU Technical Article [EN]
Fronius Datamanager 1.0 and Datamanager 2.0
(c) Fronius Australia Pty. Ltd, 2015 1/14
Load
Grid
Modbus RTU (RS 485)
kWh
Fronius
Smart Meter
Fronius inverter with
Datamanager
Digital signal
output
Ext. Relay
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 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
(c) Fronius Australia Pty. Ltd, 2015 2/14
Load
Grid
Fronius inverter with
Datamanager
Digital signal
output
Ext. Relay
Load with
signal input
Grid
Modbus RTU (RS 485)
kWh
Fronius
Smart Meter
Fronius inverter with
Datamanager
Digital signal
output
1.1.2 Switching loads via external Relay without energy meter
The digital output signal of the Datamanager controls an external relay, which switches the load. The treshold to
switch ON/OFF can be set accordingly to the output power of the inverter.
Figure 2 – Energy management function on external relay
1.1.3 Switching loads via external signal input
Loads with an external signal input may be connected to the digital signal output of the Datamanager. Therefore
no additional equipment is required. This setting can be used with or without an energy meter.
(c) Fronius Australia Pty. Ltd, 2015 3/14
Figure 3 – Energy management function on load with signal input and energy meter
L
N
E
OFF
MAN
AUTO
–
I/O 1
Fronius inverter with
Datamanager
External Relay
1.2 Wiring Detail
The following diagram shows a typical wiring example using an external relay and an override switch that allows
the additional, manual control of the load.
Figure 4 – Example connection diagram
This circuit consists of an overide switch (1) where the load can be switched manually and the power outlet (2), which the
load can be connected to. With the external relay (3) the loads will be switched on/off controlled by the settings of the
Fronius Datamanager (4).
The output on the Datamanager is on I/O port 1 and the Minus pole (or GND on Datamanger 1.0). For further
details see next chapter.
(c) Fronius Australia Pty. Ltd, 2015 4/14
I/O 1
GND
2 DATAMANAGER HARDWARE
2.1 Datamanager Version 1.0
Datamanger version 1.0 was inbuilt in Fronius Galvo and Symo inverters until end of 2014. Inverters with a
serial number lower than 25490000 are equipped with version 1.0.
Figure 5 - Datamanager 1.0 – card & plug
Internal view: Schematic connection of the Fronius Datamanager 1.0 I/O ports
Diagram on left:
(1) Internal Power supply,
(2) Internal current limit,
(3) Fronius Solar Net IN connection socket
Figure 6 - Datamanager 1.0 – card & plug
The physical connection of the energy management signal on the card is on pin I/O 1 as the positive and the
GND as minus. See Figure 5 and Figure 6.
Switching capacity of the digital outputs of the Datamanager 1.0 plug-in card: 3.2 W, 10.7 V in total for all 4
digital outputs.
Switching capacity when supplied by an external power supply with min. 10.7 – max. 24 V DC, connected to
Uint / Uext and GND: 1 A, 10.7 – 24 V DC (depending on the external power supply) per digital output.
(c) Fronius Australia Pty. Ltd, 2015 5/14
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