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h2009 avatar image
h2009 asked

Is it possible to convert battery SOC to time

Hi there

I’m looking to see if anyone has a method to convert SOC on the battery to estimated run time left on battery, ideally based on live/5/10/15/30 minute load averages.


Ideally to display on VRM.


I assume there must be away to calculate this like Tesla converts SOC to miles


Thanks.

VRMNode-REDbattery capacity
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mvas avatar image
mvas answered ·

Run Time Minutes = Battery Ah x ( %SOC - Min%SOC ) x 60 / Amps

Where Amps is instaneous or avg amps over some previous time frame

Min%SOC is the minimum %SOC you won't go below. 10%, 20%, etc for LiFePO4. 40% for Lead Acid?

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kai-fuchs avatar image
kai-fuchs answered ·

The shunts have this function build in, in was expecting they would show it in VRM too...

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pwfarnell avatar image pwfarnell commented ·

The time to go is displayed in VRM when the battery is discharging ss calculated by the BMV or SmartShunt.

screenshot-20230723-073139-kindlephoto-707344446.png


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