Hi all. My off grid system comprises of:
Multiplus 3000 II-GX
Smart Shunt
Victron MPPT with 3.4kw solar PV
12kwh Powerplus lithium batteries.
Recently the Multiplus has been shutting down on 'Low SOC', as displayed on the screen. It seems to cut out way before the battery voltage gets close to the low voltage cutoff which I have programmed at 50.0v. Today it cut out at 51.75v, which is close to 60% SOC.
Does anyone have any ideas as to why it cuts out so early? Please see the programmed settings I pulled from the Multiplus just below.
TAB: General
System frequency 50Hz
Shore current 8.0 A
Overruled by remote checked
Dynamic current limiter unchecked
External current sensor connected (see manual) unchecked
State of charge when Bulk finished 95.0 %
Battery capacity 250 Ah
Charge efficiency 0.95
TAB: Grid
Country / grid code standard Australia A: AS/NZS 4777.2:2020 stand alone app. M (no N-bypass)
AC input 1 Above selected gridcode plus LOM B (compliant)
TAB: AS/NZS4777.2:2020 Australia A (Stand alone appendix M)
Volt-Watt curve voltage V1 207.0 V
Max charge power at V1 20 %
Volt-Watt curve voltage V2 215.0 V
Max charge power at V2 100 %
TAB: Inverter
PowerAssist unchecked
Inverter output voltage 230 V
State Of Charge shut-down 20.0 %
State Of Charge restart 25.0 %
Inverter DC shut-down voltage 50.20 V
Inverter DC restart voltage 51.00 V
Low DC alarm level 50.60 V
Do not restart after short-circuit (VDE 2510-2 safety) unchecked
enable AES unchecked
TAB: Charger
Enable charger checked
Weak AC input unchecked
Stop after excessive bulk unchecked
Lithium batteries checked
Disable VSense (for diagnostic purposes) unchecked
Configured for VE.Bus BMS unchecked
Charge curve Fixed
Absorption voltage 57.60 V
Float voltage 57.60 V
Charge current 35 A
Repeated absorption time 4.00 Hr
Repeated absorption interval 7.00 Days
Absorption time 4 Hr
TAB: Virtual switch
TAB: Usage
Virtual switch usage Do not use VS
TAB: Assistants
TAB: Assistant Configuration
Assistants not used
TAB: Advanced
limit internal charger to prioritize other energy sources unchecked
