Absorption and Float values with BSL batteries

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jean-paul-1 asked Apr 26, '24

Absorption and Float values with BSL batteries

HI,

I have just replaced my lead batteries with lithium from BSLBATT. I have an OFF-GRID system with 3x Victron Multiplus, 3x SMA inverter (on AC-out), 2x Victron MPPT

Reading through all documentation, the exact required settings for absorption and float voltages are not consistent. The installation manuals and the text on the Victron website.

Absorption values I find in different documents: 54, 54.8 (if used off-grid) or 55 in ESS

Float values 55 volt

The values are also different for the Multiplus and the MPPT's

It doesn't say anything about the equalisation voltage ? Anyone knows this ?

Can someone tell me the exact values if used in OFF-GRID configuration?

Thank you,

Jean-Paul

bslbatt

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Answer 1 · 2024-04-26T14:25:54Z

Alexandra answered · Apr 26 at 02:25 PM

@Jean-Paul

Use the lithium profile and adjust values. Lithiums do not use equalisation. If you are seeing that then the wrong chemistry has been selected.

If you scan the QR code they have manual for victron.

Otherwise the setting on the victron bsl page work as well. There is only a slight difference between them.

I have used both quite fine with the BMS talking to the system it all works out.

Victron & BSLBATT Lithium batteries also lists BSLS own manual.

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Answer 2 · 2024-04-27T12:01:52Z

jean-paul-1 answered · Apr 27 at 12:01 PM

@ Alexandra

The LIthiums are selected, no doubt.

The question about equalisation is because in the MPPT the equalisation voltage is there, not in the Multiplus.

I've used the settings on the Victron website, these are most likely the most reliable and for now it seems to work fine.

I have another problem but I will post a seperate question about that

Thks

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