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Nico Bayer avatar image
Nico Bayer asked

Pylontech Internal Failure at low SOC (13%) solved?

Hi

When my battery gets to an low SOC (13%) it starts outputting "Internal Failure" Error messages.
Between 15% and 10% SOC the error appears and disappears every few minutes.
At 5% SOC the error is continous until the battery is charged up againe.

My System:
8x Pylontech US3000C
3x Multiplus2 48/5000 in 3 Phase
2x MPPT250/100
1x Fronius symo 15kw
Cerbo GX

The System is connected to the grid running ESS.

Is this error normal at that low SOC?

The system is running for 3 months now without problems. It´s the first time now reaching these low SOC, so the error did not appear until now.

Pylontecherror
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3 Answers
nickdb avatar image
nickdb answered ·

This is a question better asked of Pylontech support.

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wkirby avatar image
wkirby answered ·

This is normal at very low state of charge. I see this behaviour in my system too.
1633435367124.png

Taken from the Victron - Pylontech compatibility page here:
https://www.victronenergy.com/live/battery_compatibility:pylontech_phantom#internal_error_shown_on_battery_status


1633435367124.png (23.9 KiB)
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Nico Bayer avatar image
Nico Bayer answered ·

I just upgraded my system from 8x us3000c to 12x us3000c. The new Modules have the firmware v2.6, the old v2.2
I use a new module with firmware v2.6 as master. With that i get a lot more information of the battery on my CerboGX.


This also solves the "Internal Failure" Error messages . The system now reports the number of modules that are offline and does not report an error when the SOC reaches 10%.

Can somebody confirm that?

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Related Resources

Victron Pylontech battery compatibility guide

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