3 - Phase Victron Quattro, 10 x Pylontech US3000C not discharging

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thomaslederer asked Nov 7, '23

3 - Phase Victron Quattro, 10 x Pylontech US3000C not discharging

Hi there,

I have a problem since the last few days with my installation.

I have a 3 phase system with victron quattros and 10 US 3000c Pylontech batteries connected with an pylontech lv-hub. The system worked fine for about half a year now, but since the last few days, the pylontech batteries do not discharge lower than 40% SOC. In the overview the Pylontech battery is in idle mode and shows on ESS #1: "SOC is low" and on ESS #2: "BatteryLife is active".

I have seen that the active SOC limit indeed is set to those 40% also. But I do not really understand why this happens, as the battery was charged up to 100% by the mppt chargers during the day, as you can see in the attachments.

Picture of the whole installation:

Image of the battery stack with lv-hub:

Battery in the dashboard overview:

Battery SOC (last 30 days):

Battery SOC (last 7 days):

ESS settings:

Any help would be very appreciated.

Many thanks in advance.

MultiPlus Quattro Inverter Charger battery charging Pylontech

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jp-miata answered · Nov 08, 2023 at 07:39 AM

Look at the manual and search for BatterLife, this feature increases the SOC limit, till the battery is once fully charged. I would turn it on ESS -> Mode -> Optimized (without BatteryLife)

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Answer 1 · 2023-11-09T06:49:18Z

thomaslederer answered · Nov 09, 2023 at 06:49 AM

Ok perfect thanks a lot. And the statement on the dashboard, where #ess1 says, that it has a low SOC can be ignored by me?

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jp-miata commented · Nov 09, 2023 at 08:20 AM

Yes, it's for you an info, that the battery is not drained longer by the Multiplus, and the MPPT's will charge only the battery. I am not sure if its 5, 10 or 15 percent over min SOC before it switches over in normal operation.

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thomaslederer jp-miata commented · Nov 09, 2023 at 02:39 PM

ah ok thanks a lot for your answers

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