Electrical Connection of the Automatic Switch Box S
SMA Solar Technology AG
76
SBU2200-TEN083320
Technical Description
The dimensioning of the output cable is to be selected according to the routing conditions, the PV
power output and the upstream fuse on the grid side (see also X1/PV Meter connection).
With regard to short-circuit protection, the Sunny Boys and Sunny Backup 2200 devices do not need
to be taken into account as, due to their design, they cannot endanger the cables if a short circuit
occurs. In the event of a short circuit, only short-circuit currents from the grid require fuse protection.
Overload protection is always guaranteed if, as can be assumed, the cables which you route to the
PV system are designed for at least the feed-in power of the PV system.
8.2.3 Sunny Backup 2200 (X3/Sunny Backup)
Connect the X3/Sunny Backup connection to
the Sunny Backup 2200. Use a conductor
cross-section of max. 6 mm². The terminals
are designed as spring-type terminals. The
nominal AC current is 25 A.
NOTICE!
Device fault due to incorrect connection of other feed-in generators.
Only Sunny Boys, and no other feed-in generators, may be connected to the X2/PV System
terminal strip if the Automatic Switch Box S is connected via X1/PV Meter to a feed-in
counter which is tariffed for PV power. It is also not allowed to connect loads to the X2/PV
System terminal strip, or to the cable which runs from this terminal strip to the PV system.
