SUNNY ISLAND 5048 - Technical Description - Wind & Sun Ltd.

SMA Solar Technology AG Electrical Connection
6.4 Additional Connections
For installing the connections described below, feed the cables through the specified holes in the
rubber connection block. Plugs for sealing the RJ45 communication cable for internal and external
communication are provided in the cable insert upon delivery. Combining plugs allows you to
establish 0 to 4 feed-throughs (2 plugs without a feed-through, 1 with 1 feed-through and 2 with 2
feed-throughs). Remove any of these to connect the communication cable.
6.4.1 Battery Temperature Sensor
A battery temperature sensor must be connected for operating the Sunny Island (included in the scope
of delivery). In case of a fault (short circuit, cable break), the Sunny Island operates in a safe setting,
which over time leads to insufficient battery charging. A warning indicating that the defective battery
temperature sensor should be replaced immediately is displayed.
The KTY type battery temperature sensor with a 10 m connection cable measures the temperature of
the connected battery. This is necessary since the optimum charging voltage for a battery strongly
depends on the temperature. Further information is provided in section 13.4 ”Charge Control”
(page 99).
NOTICE!
Destruction of the battery and battery temperature sensor.
• Only use the battery temperature sensor included in the scope of delivery.
• Fasten the battery temperature sensor to the outside of one of the battery cells.
Choose a place where the heat generation during operation is the greatest.
Battery Temperature Sensor in a Cluster
A battery temperature sensor is provided with each Sunny Island. Only one battery
temperature sensor is required for a cluster. It is connected to the corresponding master.
Technical Description SI5048-TB-TEN110340 39