Victron Lifepo4 never goes to float. Is this a problem?

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sweyn asked Sep 1, '22

Victron Lifepo4 never goes to float. Is this a problem?

My system is all Victeon. CerboGX, Victron Smart LiFePO4 200Ah, Multiplus, Lynx Smart BMS MPPTs etc and everything is controlled by DVCC so as far as I’m aware it should be self managing, but it just sits in Absorbtion from the Multiplus output once the battery is full.

Is this fine?

I’m worried that it will damage the battery to be constantly in Absorbtion for months on end.

BMS multiplus ve.bus float

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Answer 1 · 2022-09-01T14:50:59Z

Stefanie (Victron Energy Staff) answered · Sep 01, 2022 at 02:50 PM

@Sweyn

Yes, that's how it works. Just ignore that and look at the voltage rather than the charge mode. It is voltage controlled by your GX device.

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sweyn commented · Sep 01, 2022 at 02:58 PM

Ah, ok. I didn’t realise that it could change voltage within the mode.

Thanks!

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Stefanie (Victron Energy Staff) ♦♦ sweyn commented · Sep 01, 2022 at 05:18 PM

We are virtually in the middle of the transition from lead-acid to LiFePo4 era. Therefore, there are still the terms like bulk, absorption and float. The Lynx Smart BMS and DVCC are already changing that a bit. The compatible chargers (MultiPlus, SmartSolar) are now informed of so-called voltage targets. For a 12.80V Lithium Smart battery this is either 13.50V or 14.20V (see screenshot - also depending on the SoC threshold in the settings for the Lynx Smart BMS). So the chargers no longer follow a charging algorithm but a Voltage target, but still show Bulk, Absorption and sometimes Float to some extent. The day will come when this will hopefully finally disappear.

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