SamplexPower PST-600-12

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30 | SAMLEX AMERICA INC. SAMLEX AMERICA INC. | 31

7.15.3 Series – Parallel Connection

200 Ah

12V String 1 12V String 2

Battery 1 Battery 3Battery 2 Battery 4

200 Ah

12V Inverter

or 12V Charger

Cable “A”

Cable “B”

Fig. 7.4 Series-Parallel Connection

Figure 7.4 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 connect-

ed 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.

7.15.4 Wiring Order in Parallel Connection of Batteries

CAUTION!

When 2 or more batteries / battery strings are connected in parallel and are

then connected to inverter/charger (See Figs 7.3 and 7.4), attention should be

paid to the manner in which the inverter/charger is connected to the battery

bank. Please ensure that if the Positive output cable of the inverter/charger

(Cable “A”) is connected to the Positive battery post of the rst battery

(Battery 1 in Fig 7.3) or to the Positive battery post of the rst battery string

(Battery 1 of String 1 in Fig. 7.4), then the Negative output cable of the

inverter/charger (Cable “B”) should be connected to the Negative battery

post of the last battery (Battery 4 as in Fig. 7.3) or to the Negative Post of the

last battery string (Battery 4 of Battery String 2 as in Fig. 7.4). 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/discharge at the same charging/

discharging current and thus, will be charged/discharged to the same state at

the same time.

- None of the batteries will see an overcharge/overdischarge condition.

SECTION 7 | General Information - Battery Related

SamplexPower PST-600-12 - Page 31