6 Electrical Connection
SMA America, LLC
50
SI4548_6048-US-TB_en-13
Technical description
6.4 Additional Connections
For installing the connections described below, feed the lines through the specified holes in the cable
support sleeve. Plugs for sealing the RJ45 data cable for internal and external communication are
provided in the cable insert upon delivery. Through a combination of the plugs there are up to four
feed-throughs (2 plugs without a feed-through, 1 plug with 1 feed-through and 2 plugs with
2 feed-throughs). Insert the necessary plugs with feed-through to attach the data cables.
6.4.1 Battery Temperature Sensor
The battery temperature sensor measures the temperature of the connected battery. This is necessary
since the optimum charging voltage for a battery strongly depends on the temperature
(see Section 13.4 "Charge Control", page 109).
The battery temperature sensor must be connected for the operation of 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 deep discharge of the battery. A warning indicating that the
defective battery temperature sensor should be replaced immediately is displayed.
Summary of Contents for Sunny Island 4548-US
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