The way I understand it, there is a hard and fast LCV which will protect the battery from long slow drain (radio or dome light on) and still allow for surge loads while the battery is at a decent SOC.
The timed combination allows you to set a higher threshold which only applies when the drain that is causing the temporary lower voltage (based in the internal resistance of the battery) is happening for a limited time only. Trivial example is cigarette lighter that might take 10A for only a minute.
More serious example would be a winch that draws high amperage but only for a few minutes at a time, dropping the measured voltage but not immediately changing the battery SOC by much.
If the voltage hits the hard limit, the time window will be ignored.
The timed combination allows you to set a higher threshold which only applies when the drain that is causing the temporary lower voltage (based in the internal resistance of the battery) is happening for a limited time only. Trivial example is cigarette lighter that might take 10A for only a minute.
More serious example would be a winch that draws high amperage but only for a few minutes at a time, dropping the measured voltage but not immediately changing the battery SOC by much.
If the voltage hits the hard limit, the time window will be ignored.
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