G.R.E.C.- Battery Care

Discharging

    Discharging batteries is entirely a function of your particular application.

    However, below is list of helpful items:

    *Shallow discharges will result in a longer battery life

    * 50% (or less) discharges are recommended

    * 80% discharge is the maximum safe discharge

State of Charge

Specific Gravity Corrected to 80o F

12 Volt battery

24 Volt battery

48 Volt battery

Volts per Cell

100%

1.277

12.73

25.4

50.93

2.12

90%

1.258

12.62

25.24

50.47

2.08

80%

1.238

12.50

25.00

49.99

2.07

70%

1.217

12.37

24.74

49.49

2.05

60%

1.195

12.24

24.48

48.96

2.03

50%

1.172

12.10

24.20

48.41

2.01

40%

1.148

11.96

23.92

47.83

1.98

30%

1.124

11.81

23.63

47.26

1.96

20%

1.098

11.66

23.32

46.63

1.93

10%

1.073

11.51

23.02

46.03

1.89

0

  

10.5

21

42

1.75

    WARNING: Do not equalize AGM - VRLA batteries

    * Verify charger has necessary AGM - VRLA setting

    *Set charger to VRLA voltage settings

*Do not overcharge VRLA batteries. Overcharging will dry out the electrolyte and damage battery.

12 volt charging

Battery Type

Abs. voltage

Float voltage

Absorption hours
       

Gel/AGM

14.4

13.8

8

AGM (fastest recharge)                                      

14.6

13.8

8

Flooded deep discharge

14.4

14.0

5

Flooded lead calcium

14.8

14.0

5

Flooded tubular plate (traction battery)

15.0

14.0

5

1. Perform an open-circuit voltage test only if the battery has not been charged within the past 24 hours.

2. Remove negative battery cable.

3. Read the voltage across the negative and positive posts with a voltmeter. Record the result.

4.Reconnect the battery cable.