© 2016 Sensata Technologies
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Appendix B – Battery Information
•
Parallel
Wiring
Wiring the batteries in parallel increases the total run time the batteries
can operate the AC loads. A parallel connection combines overall battery
capacity by the number of batteries in the string. Even though there are
multiple batteries, the voltage remains the same. In the example below
(Figure B-2), four 12 VDC/100 AHr batteries are combined into a single
12 VDC/400 AHr battery bank.
12 volt battery bank (total capacity = 400 AHrs)
overcurrent
protection
12 volts
(100 AHrs)
12 volts
(100 AHrs)
12 volts
(100 AHrs)
12 volts
(100 AHrs)
to
12 VDC
inverter
•
Series-Parallel
Wiring
A series-parallel con
fi
guration increases both voltage (to match the
inverter’s DC requirements) and capacity (to increase run time for
operating the loads) using smaller, lower-voltage batteries. In the
example below (Figure B-3), four 6 VDC/200 AHr batteries are combined
into two strings resulting in a 12 VDC/400 AHr battery bank.
Figure B-2, Parallel Battery Wiring
overcurrent
protection
String
2
String
1
12 volt battery bank (total capacity = 400 AHrs)
to
12 VDC
inverter
6 volts
(200 AHrs)
6 volts
(200 AHrs)
6 volts
(200 AHrs)
6 volts
(200 AHrs)
Figure B-3, Series-Parallel Battery Wiring
