Magnum Energy MMS-E Series - Manual (Page 47)

© 2011 Magnum Energy, Inc. 40
Appendix C - Battery Information
C3.2 Parallel Wiring
Wiring the batteries in parallel increases the total run time the batter-
ies 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 C3-2), 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
Figure C3-2, Parallel Battery Wiring
C3.3 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 C3-3), four 6 VDC/200 AHr batteries are com-
bined into two strings resulting in a 12 VDC/400 AHr battery bank.
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 C3-3, Series-Parallel Battery Wiring