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3.2 System components
The sonnenProtect 1300-AU-IN-ATS comprises of an electrical switching arrangement that is installed and
contained within the main (top) unit of the sonnenBatterie eco 9.43 system. The power supply from the
accessory consists of a cable existing from the top of the main unit. This cable will be terminated into the
protective device of a backup load supply which has to be supplied, installed, connected and tested by the
installer. The arrangement will supply dedicated circuits / appliances which are to be backed up in the event of
a power failure to a load required not exceeding 1300W.
4 Function
4.1 Basic principle
The power output of the sonnenProtect supplies electrical power both in grid and emergency operation. The
storage system with sonnenProtect accessory automatically toggles between grid operation to emergency
operation. The switchover time between grid and emergency operation is stated in the technical data.
4.2 Grid operation no grid outage
If the public electricity grid is not experiencing an outage, the backup load circuits connected to the
sonnenProtect backup supply will be continuously supplied with electrical power. This electrical power is drawn
directly from the grid and the batteries of the storage system are not discharged by the usage of the
sonnenProtect arrangement.
4.3 Emergency operation grid outage
The sonnenBatterie storage system automatically detects grid outages and disconnects from the public
electricity grid. The power output from the sonnenProtect arrangement is supplied with electrical power from
the battery capacity until the backup buffer of the storage system batteries is depleted. Once the backup buffer
put of the sonnenProtect is no
longer supplied with electrical power.
1 Total capacity
2 Available electrical power in grid operation
3 Backup buffer
4 Minimum state of charge
The storage system switches back to grid operation with a delay, after a grid outage. This can take a few minutes.
During this time the output of the sonnenProtect is supplied with power in emergency operation.