Sunny Island 4500
Installation & Operating Instructions
BWRI45-13-EE0304
- 46 -
SMA Regelsysteme GmbH
Fused interrupter to
disconnect the Sunny Island
max. 25 mm
2
e.g.
80 A
Sunny Island
L -
L +
F1
Battery
input
e.g.
60 V/ 350 Ah
Fig. 3.5:
Connection of battery to the Sunny Island
Never remove the battery cable during operation. Always switch the
inverter off first.
The battery cables should be as short as possible. Long cables re-
duce efficiency as well as the tolerable overload and have effect on
the battery management.
In order to obtain always reliable battery-related measured values the Sunny Island
has to be the only device in the system that is connected to the battery directly.
External devices connected to the battery (e. g. DC loads or battery
chargers) will cause the Sunny Island’s battery management to fail!
If the Sunny Island was ordered with terminal blocks instead of circuit breakers on the
DC connection, it has to be assured that currents are limited to a certain value and
time in case of failure. This is possible by installing a separate double pole circuit
breaker (63 A, B-characteristic or similar) between the battery and each Sunny Is-
land.