Samlex Solar SRV-100-30A Manuel D'utilisation page 19

PV +
PV -
BAT +
BAT -
SECTION 9 |
Solar Charge Controller
SCC-30AB (rear view)
Series – Parallel Connection of Batteries
PV +
PV -
BAT +
BAT -
Solar Charge Controller
SCC-30AB (rear view)
Figure 9.3 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.
!
CAUTION!
When 2 or more batteries / battery strings are connected in parallel and are then connected to the
Solar Charge Controller SCC-30AB (See Figs. 9.2 and 9.3 given above), attention should be paid to
the manner in which the Solar Charge Controller is connected to the battery bank. Please ensure
that if the Positive output cable of the Solar Charge Controller (Cable "A") is connected to the
Positive battery post of the first battery (Battery 1 in Fig. 9.2) or to the Positive battery post of the
first battery string (Battery 1 of String 1 in Fig. 9.3), then the Negative output cable of the Solar
Charge Controller SCC-30AB (Cable "B") should be connected to the Negative battery post of the
last battery (Battery 4 as in Fig. 9.2) or to the Negative Post of the last battery string (Battery 4 of
Battery String 2 as in Fig. 9.3). This connection ensures the following:
• The resistances of the interconnecting cables will be balanced.
• All the individual batteries / battery strings will see the same series resistance.
• All the individual batteries will charge at the same charging current and thus, will be charged to
the same state at the same time.
• None of the batteries will see an overcharge condition.
12V Battery
Typical Battery Connections
Cable "B"
Battery 1
Cable "A"
6V Battery
Cable "B"
Fig. 9.3: Series-Parallel Connection
12V Battery
String 1
Battery 2
6V Battery
12V Battery 12V Battery
String 2
Battery 3 Battery 4
6V Battery 6V Battery
SAMLEX AMERICA INC. | 19