Absorption to Float triggered at 40% or 60% of SoC (Multi + BMS + VE Smart Lithium LiFePo4 300ah Battery)

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esteban-moreno asked Jan 7, '22

Absorption to Float triggered at 40% or 60% of SoC (Multi + BMS + VE Smart Lithium LiFePo4 300ah Battery)

Multiplus is going from ABSORPTION to FLOAT charging state when the SoC is at 40% o 60%, which should actually been triggered when the battery is fully charge, if I'm not wrong.

Multiplus settings are the recommended ones for Lithium batteries. So floating is at 13.5v and absorption is at 14.2v.

- Could it be the Absorption time?

Any help would be really appreciate!!! thanks in advance to this great community.

Lithium Battery float

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esteban-moreno commented · Jan 07, 2022 at 02:51 PM

Adding the lapsus between the different charging states from today! It should be 1Hr of absorption and the 1hr of interval until the next absorption, right? thanks.

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klim8skeptic ♦ esteban-moreno commented · Jan 07, 2022 at 03:22 PM

Why are you not using the Smart Shunt as the battery Soc meter?

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esteban-moreno klim8skeptic ♦ commented · Jan 07, 2022 at 05:23 PM

The smart shunt is in place! it shows 0.01 always, but actually it's passing the information on the advance reports in the VRM. Actually I search why it's showing like that and I did not found an actual explanation. Do you know what could it be?

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esteban-moreno esteban-moreno commented · Jan 07, 2022 at 05:26 PM

Here is the SHUNT information, which is the same SoC that is on the multiplus dashboard!

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klim8skeptic ♦ esteban-moreno commented · Jan 07, 2022 at 10:30 PM

It might be worth checking via remote console that the Smart shunt has been selected as the battery monitor.

Settings > system setup > battery monitor. Select Smart Shunt.

Which device should I use for Soc calculation?

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Answer 1 · 2022-01-07T17:55:29Z

rdcat answered · Jan 07, 2022 at 05:55 PM

Is your smartshunt correctly calibrated / zero'd?
If that voltage is wrong, then all else will be wrong
Multiple adsorbtion is bad for Lithium. less time is better.

If you have DC loads or solar, then the SOC meter (battery monitor) in the Multi should be OFF.

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