Sonnen sonnenBatterie 10, Installation Instructions Manual, Page: 68 / 100

9 | sonnenProtect 4000 (optional)
68 / 100 Installation instructions sonnenBatterie 10
Recommended procedure for the electrical installation
Carry out the steps in the following order to ensure the smooth electrical installation of
the sonnenProtect:
1. Read sections Electrical consumers in backup operation [P. 68] and Implementing the
backup circuit(s) [P. 69] and, together with the operator of the storage system and
the sonnenProtect, define how the backup circuit or circuits are to be set up. The on-
site circumstances must always be taken into account during this process, because with
electrical installations where there are few separate circuits, it can be difficult to integ-
rate all of the desired electrical consumers in the backup circuit or to integrate only the
consumers which should be supplied with backup power.
2. Carry out the necessary revision work on the distributor in the building. It is essential to
ensure that all electrical cables meet local and national regulations in terms of their di-
mensioning and that they are suitably fuse-protected (e.g. with a
miniature circuit
breaker (MCB) .
3. If the backup circuit or circuits are installed accordingly, the sonnenProtect can be
connected and the necessary additions can be made to the storage system (see the
following sections).
4. When all steps have been implemented and the electrical installation is complete, con-
tinue with section Commissioning the sonnenProtect [P. 74].
9.6.1 Installing the backup circuit(s)
9.6.1.1 Electrical consumers in backup operation
Before installation, the installer must explain or clarify with the operator the following
points:
• Backup operation does not offer the same output as grid operation.
• Three-phase current is not available during backup operation (as only one phase is sup-
plied with power).
• Which electrical consumers should be supplied with power in backup operation? The
current paths in the building network must be installed in such a way that the consumers
which are relevant in the event of a grid outage are connected to an independent circuit
(backup circuit). The electrical consumers which are crucial for the operator in backup
operation are relevant here. Different consumers which may be important during a grid
outage are specified in the sample calculation presented below.
• How much capacity of the storage system should be reserved as an backup buffer? The
following example, in which a utility room and other important functions within a single-
family home are to be supplied with power, can be used to determine this. This example
is based on a grid outage lasting one hour (the individual power consumption values are
estimated values).
Electrical consumer Power consumption
[kW]
Active during grid
outage
[h]
Electrical work
[kWh]
Lighting 0.5 1 0.5
Freezer 0.6 0.25 0.15
Heating 0.7 0.25 0.175
Router, telephone 0.01 1 0.01