Fronius Energy Package, Operating Instructions Manual, Page: 79 / 148

Testing backup
power mode
NOTE!
Danger from immediate inverter operation in backup power mode without a con-
nection to the grid having been previously established.
During grid-connected operation, the inverter recognises and stores the direction
of phase rotation in the household network.
Without a grid connection, no information is available regarding the direction of
rotation and the inverter feeds energy with a default direction of rotation.
This can cause the three-phase consumers in the household network to experi-
ence errors.
Backup power mode should be tested once it has been installed and set up for
the first time. A battery state of charge of over 30% is recommended when in
test mode.
A description of how to perform the test operation can be found in the chapter
"Backup power checklist" of the document "Fronius Energy Package - Examples
of backup power switchover".
79
EN