Samlex Solar SCC-30AB Mode D'emploi page 21

PERCENTAGE OF
FULL CHARGE
100%
90%
80%
70%
60%
50%
40%
30%
20%
10%
0%
Table 3.3. State of Charge versus Standing Voltage – 12 V Battery
Check the individual cell voltages. If the inter cell voltage difference is more than a
0.2 V, the battery will have to be equalized. Please note that only the non-sealed /
vented / flooded / wet cell batteries are equalized. Do not equalize sealed / VRLA type
of AGM or Gel Cell Batteries.
Battery Efficiency
A lead-acid battery has an efficiency of only 75% - 85%. The energy lost appears as
heat and warms the battery. This means that the Ampere Hour (AH) energy required
to charge a battery to its full rated capacity will be approximately 120% to 130%
higher than the AH capacity rating of the battery.
Depth of Discharge and Battery Life
The more deeply a battery is discharged on each cycle, the shorter the battery life.
Using more batteries than the minimum required will result in longer life for the
battery bank. A typical life cycle chart is given in the Table below:
DEPTH OF DISCHARGE
% OF AH CAPACITy
10
50
80
100
It is recommended that the depth of discharge should be limited to 50%.
GENERAL INFORMATION: BATTERIEs
STANDING VOLTAGE OF
12 V NOMINAL BATTERy
12.63 V
12.6 V
12.5 V
12.3 V
12.2 V
12.1 V
12.0 V
11.8 V
11.7 V
11.6 V
= / < 11.6 V
CyCLE LIFE OF
GROUP 27 / 31
1000
320
200
150
T
able 3.4. Typical Cycle Life Chart
CELL VOLTAGE (12 V BATTERy
HAS 6 CELLS IN SERIES)
2.105 V
= / < 1.93 V
CyCLE LIFE OF
GROUP 8D
1500
480
300
225
3
2.10 V
2.08 V
2.05 V
2.03 V
2.02 V
2.00 V
1.97 V
1.95 V
1.93 V
CyCLE LIFE OF
GROUP GC2
3800
1100
675
550
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