Hey Team, I'm also faced this issue with same
SunBoost 6KW VM-VI Twin model from
Alibaba and same flickering issue in my inverter and they provide same type
wifi card which is only connect with
smart life with limited features even
i order again a motherboard with control card still no solution for flickering and SunBoost Alibaba team can't accept this according to Sunboost issue in my grid side voltage but I have another Company Hybrid inverter which works too smooth on same location.
At present firmware in my both control card maybe issue in firmware with this motherboard
U1 6010
U2 3917
I test this inverter in multi-scenarios
1) When inverter running
only on battery output is so smooth no light flickering and humming noise from old transformer based inverter. (No Grid & Solar connected).
2) Now
Inverter running on battery when i connect grid and inverter starts charging immediately lights starts flickering and humming noise from old inverter this time i set charging Solar and Utility. (Battery + Grid Connected)
3) When my home lights connected to Grid directly and I connect inverter with same GRID at present no Solar and Battery connected I change charging mode and grid feed mode.
-> When settings change to ( Charging mode -
Solar and Utility with Grid Feed Enable) same issue and also disturb grid side voltage because my home lights direct connected to grid still lights flickering and humming noise from old inverter.
-> When settings change to (Charging mode -
Solar Only with Grid Feed Enable) now no flickering on lights and humming noise is too low from old inverter.
-> When settings change to ( Charging mode -
Solar and Utility with Grid Feed Disable) now no flickering on lights and humming noise is too low from old inverter.
-> When settings change to (Charging mode -
Solar Only with Grid Feed Disable) now no flickering on lights and humming noise is too low from old inverter.
The main issue is Grid Voltage fluctuations when Inverter is connected that's why lights flicker even i have DSO if required anything i will provide.
Please help for this issue and if possible please provide any suitable OLD/NEW Firmware for this inverter with flash process.
Check attached both motherboard reference
View attachment 271058
Thank you to all team members for their valuable support and time contribution. Your efforts are greatly appreciated!