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dgmar-ni asked

Low battery alarm but DOD over 90%

Good day,

A system that triggers low battery alarm and it has new batteries that have a high SOC. Last night it turned off suddenly. Here you are pics of the alarm log showing the time (00:35:13) and also the SOC: (90% at 23:55)

1706798777297.png

What can be happening in this case? Any help will be appreciatted.

SOClow battery warning
1706798777297.png (317.6 KiB)
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snoobler avatar image snoobler commented ·
Please provide more information.


I can't imagine a battery at 47V being at 90% SoC.


What battery?


What device is reporting SoC?


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dgmar-ni avatar image dgmar-ni snoobler commented ·

The system has been renewed with a battery bank 24 units AGM 220Ah 12V (BAT412201084).

The system has two Quattros 5kVA 48V and the batteries have been monitoring with the BMV-702. I am not sure if the battery meter needs calibration or I am missing a parameter that is not properly adjusted.

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dgmar-ni avatar image
dgmar-ni answered ·

Good day,

The system has been charging in parallel solar with the grid (in spite the grid is not reliable one phase drops under 90V AC) but it is close to reach 56.6V:

1707158877426.png


I have a question if you can answer about the solar charger as only one string has power. Is not a problem of loosed connection or bad MC4:

1707159799366.png


No signal of smoking or burned on connection ports for PV1 or PV2 inside the controller.

Any clue?


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1707159799366.png (29.3 KiB)
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