Sunny Island 4500
Installation & Operating Instructions
BWRI45-13-EE0304
- 67 -
SMA Regelsysteme GmbH
3.7 Connection with Sunny Boy and Sunny Boy Control
To establish the recommended communication connection via RS485 (COM2) from
the Sunny Island to the Sunny Boy Control and Sunny Boy, all devices have to be
equipped with an RS485 interface. This option can be requested when ordering a
device. Devices that have already been installed can be upgraded with RS485 com-
munication later. This requires a special conversion kit.
The RS485 connection between the three devices, as already described in Chapter
3.6, not only makes possible configuration of the Sunny Island, but also defined
power limitation of the Sunny Boys as well as data recording with Sunny Data or
Sunny Boy Control.
If a Sunny Boy Control is installed later, pay attention to the required settings, jump-
ers etc. as described in the manual for the Sunny Boy Control.
3.7.1 Simple Connection at COM2 Interface
An RS485 G1 Piggy Back is required to upgrade the Sunny Island with a communica-
tion connection via the RS485 interface (COM2) later. Balancing and termination at
the Sunny Island should be provided as shown in Fig. 3.22
In this plant layout this interface of the Sunny Island (COM2-RS485) is used for con-
trolled power limitation of the Sunny Boys to ensure controlled full charging of the
storage battery.
