The specific SOC threshold is not given, but as a guideline, lead-acid batteries should generally maintain above 50% SOC and lithium-ion batteries above 20% SOC to avoid damage and maintain battery life, especially in cold conditions.
When operating below 32°F (0°C), system batteries should not be allowed to discharge below a certain State of Charge (SOC), but the specific threshold value is missing in the provided information. It is known that battery performance tends to degrade in cold conditions and may require a higher minimum SOC to operate effectively.
In general, lead-acid batteries should not be discharged below 50% SOC, while lithium-ion batteries can typically be discharged down to 20% SOC without significant issues. However, these values can vary based on the specific type of battery and the manufacturer's recommendations. When batteries are discharged below their recommended SOC, it can lead to reduced battery life and potential damage.