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 experience
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".
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