BMV resetting each morning?

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teamflames asked Dec 18, '21

BMV resetting each morning?

Hi all, I am new here. I recently had some upgraded solar work done and had an mppt charger added (not Victron). Since then my SOC seems to be 100% each morning and this seems hard to believe considering we are using power overnight. I can’t find anything in settings that resets SOC at a particular time, could something else be causing it?

Thanks

BMV Battery Monitor SOC

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Answer 1 · 2021-12-18T21:23:51Z

Stefanie (Victron Energy Staff) answered · Dec 18, 2021 at 09:23 PM

Hi @teamflames,

please post your BMV settings (screenshots).

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Answer 2 · 2021-12-19T00:12:35Z

teamflames answered · Dec 19, 2021 at 12:12 AM

Hi Stephanie

Since posting I have changed some settings. Increased charged voltage to 14v and decreased tail to 2.1% based on some YouTube videos I have seen.
SOC is showing 100% but I think that is because I accidentally pressed the manual synchronisation button?

56311502-93bd-4d0b-ba71-882cb230b371.png (182.8 KiB)

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Stefanie (Victron Energy Staff) ♦♦ commented · Dec 19, 2021 at 08:10 AM

Hi @teamflames,

looks like you have a Lithium setup. Don't know what the settings have been before, but they look ok now. In most cases 'Charged voltage' is set wrong and will cause early or late synchronising. You could raise 'tail current' up to 4%.

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kevgermany ♦♦ Stefanie (Victron Energy Staff) ♦♦ commented · Dec 19, 2021 at 08:49 AM

There's an mppt in there.

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Stefanie (Victron Energy Staff) ♦♦ kevgermany ♦♦ commented · Dec 19, 2021 at 09:44 AM

Yes, I noticed. But this should not be the cause for early synchronisation at given 'charged voltage' parameter. Even if it does, it then happens on a fully charged battery.

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