Samlexpower EVO-2212E Owner's Manual - 1.4.7

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SAMLEX AMErICA INC.  |  19

   fig 1.4  charging / Discharging curves for typical flooded lead Acid battery

1.4.7 

reduction in usable capacity at higher Discharge rates – typical in 

inverter Application

As stated earlier, the Ah capacity of automotive battery is normally applicable at a discharge rate 

of 20 hours. As the discharge rate is increased as in cases where the inverters are driving higher 

capacity loads, the usable Ah capacity reduces due to “Peukert Effect”. This relationship is not 

linear but is more or less according to the Table 1.9. 

SECTIOn 1  |  

Safety Instructions & general Information 

Typical Flooded Lead-Acid Battery Chart - 80˚F / 26.7˚C

Battery V

oltage in VDC

Battery State of Charge in Percent (%)

0         10        20       30       40        50        60       70        80        90      100      110     120     130

16.5

16.0

15.5

15.0

14.5

14.0

13.5

13.0

12.5

12.0

11.5

11.0

10.5

10.0

9.5

9.0

C/5

C/40

C/20

C/10

DISCHARGE

CHARGE

C/20

C/3

C/5

C/10

C/100

33.0

32.0

31.0

30.0

29.0

28.0

27.0

26.0

25.0

24.0

23.0

22.0

21.0

20.0

19.0

18.0

24V 12V