Electrolyte Freezing

The freezing point of the electrolyte depends on the specific gravity of the electrolyte. A fully charged battery will not freeze until the ambient temperature is below -54°C (-65°F). However, a battery with a low state of charge may freeze at temperatures as high as -7°C (20°F). Ensure that the battery maintains a nominal state of charge in order to prevent electrolyte freezing and permanent battery damage.