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peterkulisek avatar image
peterkulisek asked

Pylontech US5000 low voltage

Hello,


please can somebody help me how to solve problem with low voltage on one battery? I installed brand new pylontech US5000 with MPII as ESS, bud one of the batteries (n.2) is not working because of 2.33V on one of the cells.

Battery n.2 is few seconds online and then few seconds offline.

(Linkport connection is correct - I tried change master battery)


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Thank you a lot for advices,


Peter

Pylontech
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img-7294.png (550.3 KiB)
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2 Answers
Alexandra avatar image
Alexandra answered ·

@PeterKulisek

Not very much you can do. This is a warranty case.

Return to supplier.

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Matthias Lange - DE avatar image
Matthias Lange - DE answered ·

Looks like a HW issue.
You should contact the seller from whom you bought the batteries.

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dennibu avatar image dennibu commented ·
  • Hallo @Matthias Lange - DE , es könnte nicht sein, dass die Spannungen der beiden (Nagelneuen) Akkus so weit auseinander liegen, dass das BMS den zu hohen „Ausgleichstrom“ abschaltet. Oben sieht man nur einmal beide 5000er (min. max. weit auseinander) und einmal die 1.Batterie mit rund 3,4V. 2,33V ist schon sehr tief aber wenn alle Zellen der Batterie 2 um 2,3V liegen würde ich versuchen die 2 Batterien auf 3,4 zu bekommen? Sag's direkt, wenn ich blödsinn schreibe.
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gazza avatar image gazza dennibu commented ·

I also was thinking along the same lines?
@PeterKulisek what happens if you Only use the suspect new battery with the "Keep Battery Charged mode"? Or, if you are not happy with this suggestion. Turn the batteries OFF. Disconnect the batteries from the ESS system, remove the CAN bus connection to the GX so that the batteries are just connected to each other via the respective ports. Then turn on the batteries and press the red SW of the battery you want to be master? Do they begin to balance?

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Matthias Lange - DE avatar image Matthias Lange - DE ♦ dennibu commented ·
If I understand it correctly than both batteries are new, not just one.
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