Kz_

I think I might have figured out what exactly causes the issue, but not the solution. I don't know if other users face this, but the voltage indicator varies greatly depending on whether the battery is charging or discharging. for example, it can show 12.9V while charging, but if charging stops and immediately starts discharging, it could go down to 12.3V and vice versa. Not sure what to say about this behavior, but I always observe this. Now, if the system is recovering from a low DC voltage disconnection, based on whatever value is in setting 19. The system will briefly reboot perfectly, but soon afterward, the voltage will have seemed to go down as it normally does, but now to a value below setting 19 again, prompting the system to shut down.

yes, there is always more than 50W of load at any one time

I'll try this. I never understood this setting, so i left it in the default state

01. Output source priority selection -- SBU 05. solar supply priority – LBU 06. overload bypass – bye, bypass enabled 07. autorestart when overload occurs – enabled 08. autorestart when overtemperature occurs – enabled 10. charger source priority – CSO 11. maximum charging current – 60A 13. maximum utility charging current – 10A 14. battery type – USE 17. bulk charging current (CV voltage) – 14.0V 18. floating charging voltage – 13.6V 19. low DC cut off voltage – 12.0V 20. battery stop discharging when grid is available –- 12.1V 21. battery stop charging when grid is available -- 12.5V 27. Record Fault code – FON 28. Solar power balance – SBD 29. power saving mode – SEN

the situation appears when the grid is not available. If a similar situation appears when the grid is available, this problem doesn't arise, as you said, it will flash on the screen but work as usual

any ideas here? this still bothers me. additional observations: The inverter will shut down at the low DC voltage mark. which is expected. The inverter will attempt to restart at the first sign of daylight. But this light is not enough to sustain the system so it will shut down soon after, after a few minutes. at this point, the inverter will continue charging the batteries but not inverting. This situation persists until I attempt to manually clear the fault code. switching off for a few minutes.

To clarify it does work up to charge but does not invert power to the AC side. So, I'll find it charging but not supplying power

Yes, I guess I could add a circuit breaker. Though I was hoping for a way to wake up the device automatically when the sun is up

Yes, it is a LiFePO4. The BMS doesn't shutdown. I've avoided that by making sure the cutoff voltage is well above the BMS shutdown voltage. The shutdown is on the MUST inverter after it records a 'fault', normally when this happens, I have to manually disconnect the inverter from the battery for the inverter itself to restart inverting, which I'd like to avoid Thanks.

on my MUST hybrid inverter; If my battery runs out and results in a fault "battery voltage is too low", my expectation would be that after the sun comes and starts charging again via solar, the inverter should be able to switch itself on again. This is not happening and I am not able to configure this desired behavior via the settings. any ideas?

What does it mean when the inverter shows blank one the section where it's meant to show the battery Amperes? I suppose it shows a negative sign during charging and positive during discharing