Samlex Solar SCC-30AB Owner's Manual page 17

Negative terminal of Battery 3 is connected to the Positive terminal of Battery 2. The
Negative terminal of Battery 2 is connected to the Positive terminal of Battery 1. The
Negative terminal of Battery 1 becomes the Negative terminal of the 24V battery
bank.
Parallel Connection
Solar Charge Controller
SCC30-AB (rear view)
When two or more batteries are connected in parallel, their voltage remains the same
but their Ah capacities add up. Fig. 3.3 above shows 4 pieces of 12V, 100 Ah batteries
connected in parallel to form a battery bank of 12V 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 12V 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 12V
battery bank.
Series – Parallel Connection
Solar Charge Controller
SCC30-AB (rear view)
Figure 3.4 above shows a series – parallel connection consisting of four 6V, 200 Ah
batteries to form a 12V, 400 Ah battery bank. Two 6V, 200 Ah batteries, Batteries 1
and 2 are connected in series to form a 12V, 200 Ah battery (String 1). Similarly, two
6V, 200 Ah batteries, Batteries 3 and 4 are connected in series to form a 12V, 200 Ah
battery (String 2). These two 12V, 200 Ah Strings 1 and 2 are connected in parallel to
form a 12V, 400 Ah bank.
GENERAL INFORMATION: BATTERIEs
Cable "A"
PV +
PV -
BAT +
BAT -
Cable "B"
Fig. 3.3. Parallel Connection
Battery 1
Cable "A"
PV +
PV -
BAT +
6V Battery
BAT -
Cable "B"
Fig. 3.4. Series-Parallel Connection
Battery 1 Battery 2
12V Battery 12V Battery
String 1
Battery 2 Battery 3
6V Battery 6V Battery
Battery 3 Battery 4
12V Battery 12V Battery
String 2
Battery 4
6V Battery
3
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