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Daily 2 second imbalance and other unusual alarms

Strange alarms.pdf

Assistance or suggestions required.

See screenshots in pdf attached

I am getting a cell imbalance alarm which clears after 2 seconds every day.
I am receiving Warning Low temperature alarms at 31.9C
I have also wonderful high charge current alarm at -0.8A

Setup;
Multiplus II 48/5000/70-50 ID 2623 V497ESS setup
AC Coupled Fronius Primo 5.0 (with 4420W of PV)
4 x new Pylontech US3000C
1 x Lynx Distributor
Cerbo GX. V2.89
SmartSolar MPPT 150/45 A073 with V1.59 (with 1980W of PV)

The system acts and behaves correctly but the alarms don't make sense.

VE Config file;

TAB: GeneralSystem frequency 50Hz


Shore current 23.0 A

Overruled by remote checked

Dynamic current limiter unchecked

External current sensor connected (see manual) checked

State of charge when Bulk finished 95.0 %

Battery capacity 296 Ah

Charge efficiency 0.95 TAB: Grid

Country / grid code standard Spain: RD 1699/2011 | UNE 206007-1:2013IN


LOM detection AC input 1 Type B (grid code compliant)

Cos phi at point 1 1.00

Reactive power regulation Use a fixed Cos PhiTAB: Inverter

PowerAssist unchecked


Inverter output voltage 230 V

Inverter DC shut-down voltage 44.00 V

Inverter DC restart voltage 48.00 V

Low DC alarm level 48.00 V

Do not restart after short-circuit (VDE 2510-2 safety) unchecked

enable AES uncheckedTAB: Charger

Enable charger checked


Weak AC input unchecked

Stop after excessive bulk unchecked

Lithium batteries checked

Configured for VE.Bus BMS unchecked

Charge curve Fixed

Absorption voltage 52.00 V

Float voltage 51.00 V

Charge current 70 A

Repeated absorption time 1.00 Hr

Repeated absorption interval 7.00 Days

Absorption time 1 HrTAB: Virtual switch

TAB: Usage

Virtual switch usage Do not use VS

TAB: Assistants

TAB: Assistant Configuration

ESS (Energy Storage System) (size:1744)


*) System uses LiFePo4 with other type BMS

(This can be either a BMS connected via CAN bus or a BMS system in which the

batteries are protected from high/low cell voltages by external equipment.)

*) The battery capacity of the system is 296 Ah.

*) Sustain voltage 48.00 V.

*) Cut off voltage for a discharge current of:

0.005 C= 46.00 V

0.25 C= 46.00 V

0.7 C= 46.00 V

2 C= 46.00 V

*) Inverting is allowed again when voltage rises 1.20 V above cut-off(0).

*) The solar converter will start reducing its output power at 50.20 Hz.

Output power will be reduced to minimum when the frequency is 52.70 Hz.

The converter will disconnect when the frequency is higher than 53.00 Hz.

*) Total installed PV inverter power is 5000 Watts.

Total installed PV panel power is 4420 Watts.

*) Relevant VEConfigure settings:

- Battery capacity 296 Ah.

- PowerAssist unchecked

- Lithium batteries checked

- Dynamic current limiter unchecked

- Storage mode unchecked



Total size of all assistants including the required

(hidden) system assistants is: 1817

Multiplus-IIESSPylontech
strange-alarms.pdf (982.4 KiB)
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1 Answer
ponzoa avatar image
ponzoa answered ·

Is anyone able to assist or seen anything similar? Anyone?

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