Fronius Energy Package, Operating Instructions Manual, Page: 13 / 148

Fronius Symo Hybrid
Device concept Device design:
(1)
Housing cover
(2) Inverter
(3) Mounting bracket
(4) Connection area including DC
main switch
(5) Data communication area
(6) Data communication cover
The hybrid inverter converts the direct current generated by the PV modules into
alternating current. This alternating current is synchronized with the grid voltage
and fed into the public grid. Moreover, the solar energy can also be stored in a
connected battery for later use.
The hybrid inverter has been developed specifically for use in grid-connected
photovoltaic systems. A backup power mode is possible if the cabling is set up
accordingly.
Thanks to its design and operating principle, the inverter is extremely safe both
to install and to operate.
The inverter monitors the public grid automatically. In the event of abnormal grid
conditions, the inverter ceases operating immediately and stops feeding power
into the grid (e.g. if the grid is switched off, if there is an interruption, etc.).
The grid is monitored by monitoring the voltage, frequency and islanding condi-
tions. The inverter switches to backup power mode if it has been cabled up ac-
cordingly.
Operation of the inverter is fully automatic.
The inverter is designed to draw as much power from the PV modules as possible.
Depending on the operating point, this power is either stored in the battery, fed
into the grid or used for the household network in backup power mode.
As soon as the energy provided by the PV modules is no longer sufficient, the
power from the battery is fed into the home. Depending on the setting, power
may also be obtained from the public grid in order to charge the battery.
If the inverter becomes too hot, it automatically reduces the current output
power or charging power, or switches to backup power mode in order to protect
itself.
Reasons for the inverter becoming too hot include the ambient temperature be-
ing too high or inadequate heat dissipation (e.g. if it is installed in a switch cabinet
without suitable heat dissipation).
IMPORTANT!
The battery must only be switched on when the inverter is in
Standby mode.
13
EN