Samlexpower SEC-1260A Owner's Manual page 9

Parallel Connection
Battery 4 Battery 3
+
12V 12V
When two or more batteries are connected in parallel, their voltage remains the same but
their AH capacities add up. Fig. 2 above shows 4 pieces of 12 V, 100 AH batteries
connected in parallel to form a battery bank of 12 V with a capacity of 400 AH. The four
positive terminals of Batteries 1 to 4 are paralleled (connected together) and this common
positive connection becomes the positive terminal of the 12 V bank. Similarly, the four
negative terminals of Batteries 1 to 4 are paralleled (connected together) and this common
negative connection becomes the negative terminal of the 12 V battery bank.
Series – Parallel Connection
12 V String 2
Battery 4 Battery 3
+
6V 6V
Fig 3. Series-Parallel Connection
Figure 3 above shows a series – parallel connection consisting of four 6V, 200 AH batteries
to form a 12 V, 400 AH battery bank. Two 6 V, 200 AH batteries, Batteries 1 and 2 are
connected in series to form a 12 V, 200 AH battery (String 1). Similarly, two 6 V, 200 AH
batteries, Batteries 3 and 4 are connected in series to form a 12 V, 200 AH battery (String
2). These two 12 V, 200 AH Strings 1 and 2 are connected in parallel to form a 12 V, 400 AH
bank.
Battery 2
Battery 1
+ + +
12V 12V
Fig 2. Parallel Connection
12 V String 1
Battery 2 Battery 1
+ + +
6V 6V
Page 8
Cable A
+
12V Charger
Cable B
Cable A
+
12V Charger
Cable B