Translations:Simplified energy storage sizing and selection/17/en

The minimum Ah value (Step 2) must be adjusted for the minimum temperature that the batteries will reach during operation. The temperature of lead acid batteries has a significant effect upon performance. When lead acid batteries reach a temperature below 25°C, their usable capacity begins to decline. This can lead to batteries being deeply discharged and damaged, therefore the size of the energy storage system should be adjusted to ensure that there is adequate energy available at the minimum expected indoor temperature for the location. The temperature correction factor is just an estimation that allows the energy storage system to be increased in size to account for lower temperatures.

Temperature correction factors for various battery types at varying temperatures: