Victron MPPT Passed PV Voltage to Battery

Hi All,

As the title says, I suspect a Victron SmartSolar MPPT 100/50 has passed PV voltage direct to the attached battery and subsequent system, causing a failure of the BMS, a very badly damaged battery with massively swollen cells, and also damage to other components such as lights etc.

The suspicion is backed up via data on the VRM portal whicho shows the MPPT output being close to 70V for a number of hours, and the SmartShunt also reporting the same.
This is all on a 12.8V system.

@Guy Stewart (Victron Community Manager) @Johannes Boonstra (Victron Energy Staff)
Is there anyone I can talk about this, to provide the data and images of the issue - as I think this will end up being a significant insurance claim.

2 |3000

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klim8skeptic ♦ commented · 5 days ago

@fitmydashcam_ltd you might want to upload some screen shots.

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fitmydashcam-ltd klim8skeptic ♦ commented · 5 days ago

Exported direct from VRM.

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screenshot-2024-07-22-at-104753.jpg (96.3 KiB)

screenshot-2024-07-22-at-104814.jpg (30.8 KiB)

nickdb ♦♦ fitmydashcam-ltd commented · 5 days ago

You have confirmed that the charger is actually set to 12V and not 48V.

There is a 10V difference between the PV voltage and the battery.

I would export settings and chart trends from the mppt itself. If it had a fault it would be reported there.

In any case, it sounds like you should open a support case as this is unlikely to be something the community can assist with.

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fitmydashcam-ltd nickdb ♦♦ commented · 5 days ago

As shown by the smartshunt data, there is almost no difference between the reported voltage at the MPPT input and the smartshunt.
I am trying to export, and get hands on the unit, but its in a different country - so a bit tricky at present.

I'll open a support case.