question

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larryg asked

SmartShunt Tail Current Calculation?

From SmartShunt Manual, Section 7.1.4:

The “Tail current” parameter is expressed as a percentage of the battery capacity.

As I understand it, the unit of "tail current" is Amps; the unit of battery capacity is Amp-Hours. A percentage of Amp-Hours is still Amp-Hours.

How does the SmartShunt calculate an amperage from a percent of battery capacity?

BMV Battery Monitor
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1 Answer
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pwfarnell answered ·

Theoretically, the tail current the the percentage of the 1C charge rate of the battery (the current flow required to charge the battery in 1 hour), so if you have 400 Amp-hour of batteries, the 1C charge rate is 400 Amps and if your tail current is 1% then it is 4 Amps. This makes the units correct, but simply it is the percentage of the numerical value of the battery capacity.

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