Battery capacity is affected by ambient temperature.  Capacity is maintained in warmer temperatures, but cycle life is reduced.  Cooler ambient temperatures will reduce battery capacity, but cycle life is improved.


Note: Cycle life loss of ~50% is expected for every 10˚C over 25˚C(77˚F)


MULTIPLIER FOR COLD TEMPERATURES

EXAMPLE:

1000 AH battery bank operating temp -9˚C (15˚F)

1.63 X 1000 = 1630ah

 

TEMPERATURE °F
TEMPERATURE °CMULTIPLIER

80°

26.7°

1.00

75°

23.9°

1.00

70°

21.2°

1.02

65°

18.3°

1.04

60°

15.6°

1.07

55°

12.8°

1.10

50°

10.0°

1.13

45°

7.2°

1.17

40°

4.4°

1.22

35°

1.7°

1.27

30°

-1.1°

1.37

25°

- 3.9°

1.42

20°

- 6.7°

1.51

15°

- 9.4°

1.63

10°

- 12.2°

1.77

- 15.0°

1.95

- 17.8°

2.17

- 5°

- 20.6°

2.21

- 10°

- 23.3°

2.25