SMA AUTOMATIC SWITCH BOX L - Manual (Page 21)

SMA Solar Technology AG Electrical Connection
Installation Guide AS-BoxL-IEN084410 21
5.3 Connecting the PV System
Cable requirements
The cable type and laying method must be suitable for the application and location of use. Select the
cable according to the upstream fuse on the grid side.
For a Sunny Backup system with a generator, also pay attention to the rating of the generator feed-
in. If the generator feed-in at the "X6/Generator" connection terminal has a greater rating than the
supply cable from the feed-in meter (upstream of "X5/PV Meter"), then you must dimension the output
cable from the PV System (X4/PV system) to this higher fuse value.
Cable protection
The Automatic Switch Box does not replace the distributor box or fuse box of the PV
system. For purposes of fuse protection and isolation, install a line circuit breaker between
the Automatic Switch Box and the PV system. Be sure to observe all standards applicable
at the installation site.
Connecting other energy sources
Instead of a PV system, you can connect other energy sources (e.g. small wind turbine
systems) to the Automatic Switch Box. In any case, make sure that a counter with the
corresponding tariff is connected to the Automatic Switch Box.
The utility grid operator will not permit a mixture of energy sources (connecting a PV system
and a small wind turbine system) because the feed tariffs of various energy sources differ.
Object Description Value
A Cable cross-section Max. 16 mm
2
B Strip insulation 13 - 15 mm