No loading or unloading of multiplus 2. Battery low although high voltage.

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ak-flocke4 asked Aug 28, '23

No loading or unloading of multiplus 2. Battery low although high voltage.

My system (Multiplus II GX, 48V with pylontech US3000c) was running 1 year wo problems. After I changed battery type from LiFePo4 to Pb-acid and back to LiFePo4 I got low battery alarm. Since that moment there was no ESS relais test done anymore. I loaded the battery up to 50V and more (by direct charge) but still "low battery" alarm.

The Switch is on "I". I did many resets (AC off / Switch Off - also pos. "II" tried) but no change / no reaction of "ESS relay test" (no clicking of relais on Switch or power ON). Communication to battery is via CAN-Bus, it works fine and BMS has no alarms or failure.

Any Help available? Thanks!

ESS low battery warning

5

2 |3000

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ejrossouw commented · Aug 28, 2023 at 07:37 AM

Have you changed the battery settings as per https://www.victronenergy.com/live/battery_compatibility:pylontech_phantom ? How many batteries and which MP?

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ak-flocke4 ejrossouw commented · Aug 28, 2023 at 08:34 AM

Thank you, but as I told, the system was running perfect for 1 year with all numbers set nearly same as described in your Link (also battery cut off values on low voltage around 46V. Sustain 48V + 1.2V offset.

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ak-flocke4 ejrossouw commented · Aug 28, 2023 at 08:48 AM

Bettry: 1 Pylontech US3000c

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seb71 commented · Aug 28, 2023 at 08:19 AM

After I changed battery type from LiFePo4 to Pb-acid and back to LiFePo4

Do you still have the ESS Assistant?

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ak-flocke4 seb71 commented · Aug 28, 2023 at 09:05 AM

I think I still have ESS Assistant / Multiplus uses it as I can see and change all parameters in the remote console (or what do you mean with "have the assistant"?). I changed minimal some numbers and uploaded new VEconfig file AFTER the problem occured, but also no change in reaction.

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Modifications Space

Node Red Space

Answer 1 · 2023-08-30T18:36:28Z

ak-flocke4 answered · Aug 30, 2023 at 06:36 PM

My Problem was solved by updating OS and Firmware on latest version. Unbelievable!...But I am lucky!

2 |3000

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