Connecting The Battery - SMA Sunny Island 2012 Technical Description

Sunny Island Electrical Connection
t = disconnection time in seconds
I
SC
S = cross section of the conductor in mm²
A grounding conductor of 10,000 mm² cross-section is thus adequate for short-circuit currents up to
16 A.

7.2.2 Connecting the Battery

Connect a suitable battery to the DC side (see section 20 "Technical Data" (Page 197)).
WARNING!
Risk of lethal electric shock when the battery is connected!
Connect the NH fuse to the BatFuse-A.01 bracket or close the DC fuse disconnector only
after completing all installation work on the island grid system.
The DC connection must be made observing all valid regulations (e.g., DIN EN 50272-2, "Safety
requirements for Batteries and Battery Systems - Part 2: Stationary Batteries").
WARNING!
Danger of burns or even death due to arcing and short-circuiting when
connecting the battery.
• All safety and maintenance instructions provided by the battery manufacturer must
be heeded.
• Use special (insulated) tools to mount and install the battery.
• Please observe the correct cross-section and polarity of the leads connected to the
battery.
DC Cables
The DC cables should be as short as possible (in any case < 30 m). Long cables and
insufficient cable cross-sections reduce the system efficiency as well as the overload
capabilities. Do not lay the battery feed cables under plaster or in armored plastic pipes.
High currents flow through the battery cables, so they can become very warm.
44 SI2012_2224-TEN082311
= max. battery current (short circuit) in Amperes
SMA Solar Technology AG
Technical Description