6 Electrical Connection
SMA Solar Technology AG
Operating manual
SBSxx-10-BE-en-11
39
Position
Designation
L
Grounding point for grounding the battery/batteries
M
Jacks
BAT1
to
BAT4
for the connection of the battery communication ca-
ble and the communication cable of the automatic transfer switch
N
Jack
DISPLAY
for the LED assembly connection in the enclosure lid of the
Connection Unit
O
Terminal blocks for DC connection
P
Auxiliary battery (3.6 V, 2600 mAh, size: AA / 14500)
After switching the black-start switch, energy is made available from the
auxiliary battery in order to switch the battery and therefore also the in-
verter on when they are in sleep mode. The auxiliary battery is designed
to function for the entire service life of the product and must not be re-
placed when used in the usual manner.
6.2
AC Connection
6.2.1
Requirements for the AC Connection
Cable requirements:
☐ External diameter: 18 mm
☐ Conductor cross-section: 4 mm² to 16 mm²
☐ Insulation stripping length: 18 mm
☐ Sheath stripping length: 250 mm
☐ The cable must be dimensioned in accordance with the local and national directives for the
dimensioning of cables. The requirements for the minimum wire size derive from these
directives. Examples of factors influencing cable dimensioning are: nominal AC current, type of
cable, routing method, cable bundling, ambient temperature and maximum desired line losses
(for calculation of line losses, see the design software "Sunny Design" from software
version 2.0 at www.SMA-Solar.com).