Figure B-2, Parallel Battery Wiring; Figure B-3, Series-Parallel Battery Wiring - Magnum Energy MMS Series Owner's Manual

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.
(100 AHrs)
(100 AHrs)
(100 AHrs)
(100 AHrs)
12 volt battery bank (total capacity = 400 AHrs)

Figure B-2, Parallel Battery Wiring

Series-Parallel Wiring – A series-parallel confi 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.
(200 AHrs)
String 1
(First)
String 2
(200 AHrs)
(Last)
12 volt battery bank (total capacity = 400 AHrs)

Figure B-3, Series-Parallel Battery Wiring

© 2017 Sensata Technologies
Appendix B – Battery Information
12 volts
12 volts
12 volts
12 volts
6 volts 6 volts
(200 AHrs)
6 volts 6 volts
(200 AHrs)
overcurrent
protection
To
12 VDC
Inverter
overcurrent
protection
To
12 VDC
Inverter
45